[opensuse] I need to find what is a certain IPv6 address in my LAN
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Content-ID: <alpine.LSU.2.20.1603192035250.14097@Grypbagne.inyvabe> Hi, I just told my router to send log entries to a computer on my lan, and it is talkative: <3.4> 2016-03-19T20:24:50+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <3.4> 2016-03-19T20:24:57+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <3.4> 2016-03-19T20:25:06+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <3.4> 2016-03-19T20:25:12+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <3.4> 2016-03-19T20:25:20+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <3.4> 2016-03-19T20:25:31+01:00 router radvd 675 - - message repeated 2 times: [ our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4] I only found a post in google with a similar message, and I don't see much in it: <http://w3foverflow.com/question/bridged-vm-guest-does-not-get-ipv6-ra-prefix-from-host/> As a first step, I try to find what machine is that in my LAN. I can ping it: Telcontar:~ # ping6 -I eth0 "fe80::8cae:84ff:fe43:27d4" PING fe80::8cae:84ff:fe43:27d4(fe80::8cae:84ff:fe43:27d4) from fe80::221:85ff:fe16:2d0b eth0: 56 data bytes 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=1 ttl=64 time=1.79 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=2 ttl=64 time=0.501 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=3 ttl=64 time=0.471 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=4 ttl=64 time=0.489 ms ^C - --- fe80::8cae:84ff:fe43:27d4 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3003ms rtt min/avg/max/mdev = 0.471/0.812/1.790/0.565 ms Telcontar:~ # I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to http://[fe80::8cae:84ff:fe43:27d4]/ in Firefox, following advice in Google. But Firefox says: +++..... The address isn't valid The URL is not valid and cannot be loaded. Web addresses are usually written like http://www.example.com/ Make sure that you're using forward slashes (i.e. /). ....++- Chrome, instead, says: +++..... This site can’t be reached The webpage at http://[fe80::8cae:84ff:fe43:27d4]/ might be temporarily down or it may have moved permanently to a new web address. ERR_INVALID_ARGUMENT ....++- I know we have talked about this previously, but I can't locate the posts. How then are IPv6 addresses entered into a browser, or is it not supported? More importantly, how do I locate that machine? I tried nmap, but no go: +++..... Telcontar:~ # nmap -A -T4 -6 "fe80::8cae:84ff:fe43:27d4" Starting Nmap 6.40 ( http://nmap.org ) at 2016-03-19 20:37 CET Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn Nmap done: 1 IP address (0 hosts up) scanned in 2.00 seconds Telcontar:~ # ....++- which is false, it responds to ping. I also tried ssh/telnet: Telcontar:~ # ssh [fe80::8cae:84ff:fe43:27d4] ssh: Could not resolve hostname [fe80::8cae:84ff:fe43:27d4]: Name or service not known Telcontar:~ # ssh "[fe80::8cae:84ff:fe43:27d4]" ssh: Could not resolve hostname [fe80::8cae:84ff:fe43:27d4]: Name or service not known Telcontar:~ # The man page says to use brackets. :-? - -- Cheers Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlbtrmsACgkQtTMYHG2NR9WH5wCeJGVDEL0CqOq9pq/A05Yo6nOQ zg4AniIt3itBxYF+7RKO+tTgDBQ6arMB =2ZEB -----END PGP SIGNATURE-----
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to
http://[fe80::8cae:84ff:fe43:27d4]/
in Firefox, following advice in Google. But Firefox says:
+++..... The address isn't valid
When using the link local addresses, you have to specify the interface. Also, that address contains a modified version (fffe added to the middle and bit 7 inverted, IIRC) of the device MAC address. You could check the MAC addresses of the various devices. You might also check your arp cache, to see if there's an IPv4 address that corresponds to the MAC address. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 2016-03-19 21:03, James Knott wrote:
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to
http://[fe80::8cae:84ff:fe43:27d4]/
in Firefox, following advice in Google. But Firefox says:
+++..... The address isn't valid
When using the link local addresses, you have to specify the interface.
How? etho http://[fe80::8cae:84ff:fe43:27d4]/ invalid. http://[fe80::8cae:84ff:fe43:27d4]/ eth0 gets info on getting new tab. (about:newtab) etho http://[fe80::8cae:84ff:fe43:27d4]/ not understood. So? How do I type that into firefox or chrome? What's the syntax for specifying the interface? :-?
Also, that address contains a modified version (fffe added to the middle and bit 7 inverted, IIRC) of the device MAC address. You could check the MAC addresses of the various devices. You might also check your arp cache, to see if there's an IPv4 address that corresponds to the MAC address.
Telcontar:~ # ping6 -I eth0 "fe80::8cae:84ff:fe43:27d4" PING fe80::8cae:84ff:fe43:27d4(fe80::8cae:84ff:fe43:27d4) from fe80::221:85ff:fe16:2d0b eth0: 56 data bytes 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=1 ttl=64 time=0.491 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=2 ttl=64 time=0.473 ms ^C --- fe80::8cae:84ff:fe43:27d4 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1000ms rtt min/avg/max/mdev = 0.473/0.482/0.491/0.009 ms Telcontar:~ # arp Address HWtype HWaddress Flags Mask Iface moria.valinor ether 00:01:02:03:04:05 C eth0 bilbo.valinor ether 00:1e:0b:08:4c:cb C eth0 192.168.74.119 ether 00:0c:29:5f:45:90 C vmnet8 AmonLanc.valinor ether 00:03:0d:05:17:fc C eth0 router.valinor ether f8:8e:85:64:78:f2 C eth0 Telcontar:~ # I don't see any "27d4" in there. Maybe the router arp table: IP address Flags HW Address Device 10.128.0.1 Complete e0:97:96:bc:89:ca eth0.3 192.168.1.15 Complete 00:03:0d:05:17:fc br0 192.168.1.5 Complete f8:1a:67:91:f4:22 br0 192.168.1.132 Complete 5c:51:88:8f:3b:18 br0 192.168.1.201 Complete 90:ef:68:3a:0c:b8 br0 192.168.1.14 Complete 00:21:85:16:2d:0b br0 Nope. :-? -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)
Carlos E. R. wrote:
On 2016-03-19 21:03, James Knott wrote:
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to
http://[fe80::8cae:84ff:fe43:27d4]/
in Firefox, following advice in Google. But Firefox says:
+++..... The address isn't valid
When using the link local addresses, you have to specify the interface.
How? [snip] So? How do I type that into firefox or chrome? What's the syntax for specifying the interface? :-?
http://[fe80::8cae:84ff:fe43:27d4%25eth0] -- Per Jessen, Zürich (4.4°C) http://www.dns24.ch/ - free dynamic DNS, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
20.03.2016 12:48, Per Jessen пишет:
Carlos E. R. wrote:
On 2016-03-19 21:03, James Knott wrote:
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to
http://[fe80::8cae:84ff:fe43:27d4]/
in Firefox, following advice in Google. But Firefox says:
+++..... The address isn't valid
When using the link local addresses, you have to specify the interface.
How? [snip] So? How do I type that into firefox or chrome? What's the syntax for specifying the interface? :-?
Out of curiosity - does it actually work with any browser (I know RFC number :) )? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Andrei Borzenkov wrote:
20.03.2016 12:48, Per Jessen пишет:
Carlos E. R. wrote:
On 2016-03-19 21:03, James Knott wrote:
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to
http://[fe80::8cae:84ff:fe43:27d4]/
in Firefox, following advice in Google. But Firefox says:
+++..... The address isn't valid
When using the link local addresses, you have to specify the interface.
How? [snip] So? How do I type that into firefox or chrome? What's the syntax for specifying the interface? :-?
Out of curiosity - does it actually work with any browser (I know RFC number :) )?
Haha, I was just wondering that myself. I can't get it to work anywhere (FF, Chrome, Opera, Konqueror, Chrom@android). -- Per Jessen, Zürich (5.2°C) http://www.dns24.ch/ - your free DNS host, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 03/20/2016 05:48 AM, Per Jessen wrote:
Carlos E. R. wrote:
On 2016-03-19 21:03, James Knott wrote:
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to
http://[fe80::8cae:84ff:fe43:27d4]/
in Firefox, following advice in Google. But Firefox says:
+++..... The address isn't valid When using the link local addresses, you have to specify the interface. How? [snip] So? How do I type that into firefox or chrome? What's the syntax for specifying the interface? :-? http://[fe80::8cae:84ff:fe43:27d4%25eth0]
What's the "25" between % & eth0 for? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
20.03.2016 14:48, James Knott пишет:
On 03/20/2016 05:48 AM, Per Jessen wrote:
Carlos E. R. wrote:
On 2016-03-19 21:03, James Knott wrote:
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
I think: maybe looking at its web page, if present or not, I could see what it is: printer, router, computer... Ok, so I try to browse to
http://[fe80::8cae:84ff:fe43:27d4]/
in Firefox, following advice in Google. But Firefox says:
+++..... The address isn't valid When using the link local addresses, you have to specify the interface. How? [snip] So? How do I type that into firefox or chrome? What's the syntax for specifying the interface? :-? http://[fe80::8cae:84ff:fe43:27d4%25eth0]
What's the "25" between % & eth0 for?
"%25" stands for "%" -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 2016-03-20 10:48, Per Jessen wrote:
Carlos E. R. wrote:
When using the link local addresses, you have to specify the interface.
How? [snip] So? How do I type that into firefox or chrome? What's the syntax for specifying the interface? :-?
This may be it, because it produces a blank page, not an error. The same as if I go to http://192.168.1.6/, which if I remember correctly, is the IP of my switch, which can be controlled only from Windows with its own software. In Linux, blank page. I tried to access it from a virtualized XP, but the silly configuration page says there is no switch in the LAN, and does not allow me to enter the IP manually. VM is running in NAT mode. Changing to bridged mode... yes, now it sees the switch. But it does not allow me to enter its configuration, it still says we are on different networks. Ok, force XP to an IP on my LAN... now I have access to the switch! But what was its password!? Ah, ok, found it. But I don't see anything of interest there for the current problem - see Florian post and my response) -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)
On 03/20/2016 08:29 AM, Carlos E. R. wrote:
But I don't see anything of interest there for the current problem - see Florian post and my response)
I thought the original problem was finding the source of the IPv6 link local packets. I don't understand how that requires a browser. As mentioned earlier, the arp or ip neighbour commands would have tied a MAC address or even IPv4 address to that packet. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday, 2016-03-20 at 09:20 -0400, James Knott wrote:
On 03/20/2016 08:29 AM, Carlos E. R. wrote:
But I don't see anything of interest there for the current problem - see Florian post and my response)
I thought the original problem was finding the source of the IPv6 link local packets. I don't understand how that requires a browser. As mentioned earlier, the arp or ip neighbour commands would have tied a MAC address or even IPv4 address to that packet.
:-) Well, the first problem was identifying what host or thing was the router message talking about: <3.4> 2016-03-20T22:20:52+01:00 router radvd 675 - - our AdvManagedFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <1.4> 2016-03-20T22:20:57.082358+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <3.4> 2016-03-20T22:20:57+01:00 router radvd 675 - - our AdvManagedFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <3.4> 2016-03-20T22:21:04+01:00 router radvd 675 - - our AdvManagedFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <1.4> 2016-03-20T22:21:12.094548+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <3.4> 2016-03-20T22:21:12+01:00 router radvd 675 - - our AdvManagedFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 Using a browser was a tool. If the IPv6 address produces the same web page as another IPv4 address, then they are both from the same machine. But the real problem is stopping the messages, and Florian identified the cause. What IP is it there it does no longer really matters ;-) Now that I have combined the logs from both routers into a single file, I can see that both are complaining, rather simultanteously. - -- Cheers, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlbvFcoACgkQtTMYHG2NR9VbyQCgjOVvsn8EAdRtG+TWnd/zRUi8 mrsAnA1U8fP9oBMcyMQQpjfn8hSgLOwo =/Wl7 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 03/19/2016 08:54 PM, Carlos E. R. wrote:
Content-ID: <alpine.LSU.2.20.1603192035250.14097@Grypbagne.inyvabe>
Hi,
I just told my router to send log entries to a computer on my lan, and it is talkative:
<3.4> 2016-03-19T20:24:50+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4
You have more than one device, that sends router advertisements or dhcp answers. See man radvd -> AdvOtherConfigFlag on|off When set, hosts use the administered (stateful) protocol for autoconfiguration of other (non-address) information. The use of this flag is described in RFC 4862. and i think the flag controls how RFC 4862 section 5.6 is managed.
I only found a post in google with a similar message, and I don't see much in it:
<http://w3foverflow.com/question/bridged-vm-guest-does-not-get-ipv6-ra-prefix-from-host/>
As a first step, I try to find what machine is that in my LAN. I can ping it:
Telcontar:~ # ping6 -I eth0 "fe80::8cae:84ff:fe43:27d4" PING fe80::8cae:84ff:fe43:27d4(fe80::8cae:84ff:fe43:27d4) from fe80::221:85ff:fe16:2d0b eth0: 56 data bytes 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=1 ttl=64 time=1.79 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=2 ttl=64 time=0.501 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=3 ttl=64 time=0.471 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=4 ttl=64 time=0.489 ms ^C
Try: ip neighbour show it should show you the arp cache and the contents of the neighbour table. Matching the MAC adresses may help you find the IPv4, but only if there was IPv4 traffic recently.
On 2016-03-20 00:39, Florian Gleixner wrote:
On 03/19/2016 08:54 PM, Carlos E. R. wrote:
I just told my router to send log entries to a computer on my lan, and it is talkative:
<3.4> 2016-03-19T20:24:50+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4
You have more than one device, that sends router advertisements or dhcp answers. See man radvd -> AdvOtherConfigFlag on|off
When set, hosts use the administered (stateful) protocol for autoconfiguration of other (non-address) information. The use of this flag is described in RFC 4862.
and i think the flag controls how RFC 4862 section 5.6 is managed.
Ah, it is starting to make sense! Kind of. I do have two routers, yes. One is the actual router, connected to my ISP fibre, the other is only acting as a WiFi access point, not as router (its WAN is disconnected). But the IP that the message is reporting, fe80::8cae:84ff:fe43:27d4, happens to belong to my switch, not the router. ISP--fibre--[Main router]---[switch]---[R-W-A.P.]-- My computer is connected to the switch. On the "Router-WiFi-Access Point" I have dhcp disabled on IPv4. However, it is impossible to disable RADVD, which is used for IPv6, and is the culprit here. The configuration page says (TD-W8970): +++...................... IPv6 LAN Settings The parameters of IPv6 LAN can be configured on this page. Note: Only default group supports IPv6 now. Group: Default Address Autoconfiguration Type: (*) RADVD () DHCPv6 Server Site Prefix Configuration Type: ( ) Delegated (*) Static Site Prefix: fC00:0:0:0:: Site Prefix Length: 64 ......................++- I suppose I should switch it to "delegated". But it does not allow me to, because it wants me to enter a "Prefix delegated WAN connection", and it says "No available interface". If I click "Save", it says "No WAN connection! Please add one first." But there is no WAN, it not connected. The router is configured in Wireless Router Mode. The port that acts as "WAN" is disconnected, there is only one wire coming from the switch to one of its LAN connectors, and another going to TV top box. Ie, I use its switch side. The Wireless works just fine, in the same LAN as the wire side, which is what I want. The WAN configuration is: +++...................... EWAN Settings Connection Type: Static IP Enable IPv4: (*) IP Address: 192.168.2.1 Subnet Mask: 255.255.255.0 Gateway: 0.0.0.0 (optional) DNS Server: 192.168.1.1 (optional) Secondary DNS Server: 0.0.0.0 (optional) Enable IPv6: ( ) Default Gateway: Current connection. ......................++- I will try "Connection Type: Dynamic" with IPv6 enabled. It will be eternally in "connecting state"... However, now it allows me in the "IPv6 LAN Settings" to enable "delegated" settings. However, this does not stop the router from complaining: <3.4> 2016-03-20T13:04:17+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 And the wifi router also complains:
<1.5> 2016-03-20T13:05:03.743227+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1 <1.5> 2016-03-20T13:05:06.743370+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1 <1.5> 2016-03-20T13:05:09.743202+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1 <1.5> 2016-03-20T13:05:14.743305+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0 <1.4> 2016-03-20T13:05:17.695966+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.5> 2016-03-20T13:05:17.743162+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0 <1.5> 2016-03-20T13:05:20.743185+01:00 oldrouter - - - DHCPC: Recv no OFFER, DHCP Service unavailable <1.4> 2016-03-20T13:05:32.705996+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.4> 2016-03-20T13:05:47.717960+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.4> 2016-03-20T13:06:02.729800+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.4> 2016-03-20T13:06:17.740839+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.4> 2016-03-20T13:06:32.753723+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.4> 2016-03-20T13:06:47.764641+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.5> 2016-03-20T13:07:01.742983+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0 <1.4> 2016-03-20T13:07:02.774230+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <1.5> 2016-03-20T13:07:04.743067+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0 <1.5> 2016-03-20T13:07:07.742966+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 0 <1.5> 2016-03-20T13:07:12.742616+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1 <1.5> 2016-03-20T13:07:15.742443+01:00 oldrouter - - - DHCPC: Send DISCOVER with request ip 0.0.0.0 and unicast flag 1
I should set the WAN side to "static" and write some sensible IPv6 config, but I do not know what. +++...................... EWAN Settings Connection Type: Static IP Enable IPv4: (*) IP Address: 192.168.2.1 Subnet Mask: 255.255.255.0 Gateway: 0.0.0.0 (optional) DNS Server: 192.168.1.1 (optional) Secondary DNS Server: 0.0.0.0 (optional) Enable IPv6: (*) IPv6 Address: :: Prefix Length: 64 IPv6 Gateway: :: (optional) IPv6 DNS Server: :: (optional) Secondary IPv6 DNS Server: :: (optional) Default Gateway: Current connection. IPv6 Default Gateway: Current connection. ......................++- Any idea what could I write there as IPv6 address and length?
As a first step, I try to find what machine is that in my LAN. I can ping it:
Telcontar:~ # ping6 -I eth0 "fe80::8cae:84ff:fe43:27d4" PING fe80::8cae:84ff:fe43:27d4(fe80::8cae:84ff:fe43:27d4) from fe80::221:85ff:fe16:2d0b eth0: 56 data bytes 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=1 ttl=64 time=1.79 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=2 ttl=64 time=0.501 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=3 ttl=64 time=0.471 ms 64 bytes from fe80::8cae:84ff:fe43:27d4: icmp_seq=4 ttl=64 time=0.489 ms ^C
Try:
ip neighbour show
Telcontar:~ # ip neighbour show fc00::fa1a:67ff:fe91:f422 dev eth0 lladdr f8:1a:67:91:f4:22 router STALE fe80::8cae:84ff:fe43:27d4 dev eth0 lladdr f8:1a:67:91:f4:22 router DELAY fe80::fa8e:85ff:fe64:78f2 dev eth0 lladdr f8:8e:85:64:78:f2 router STALE 192.168.74.119 dev vmnet8 lladdr 00:0c:29:5f:45:90 STALE 192.168.1.1 dev eth0 lladdr f8:8e:85:64:78:f2 REACHABLE 192.168.1.5 dev eth0 lladdr f8:1a:67:91:f4:22 STALE <==== wifi AP. 192.168.1.15 dev eth0 lladdr 00:03:0d:05:17:fc REACHABLE 192.168.1.2 dev eth0 lladdr 00:01:02:03:04:05 REACHABLE 192.168.1.6 dev eth0 lladdr 14:cc:20:ba:ba:bd DELAY <==== switch Telcontar:~ # The second one is the one.
it should show you the arp cache and the contents of the neighbour table. Matching the MAC adresses may help you find the IPv4, but only if there was IPv4 traffic recently.
I provoked some traffic to refresh some of the entries. -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)
Carlos E. R. wrote:
ip neighbour show
Telcontar:~ # ip neighbour show fc00::fa1a:67ff:fe91:f422 dev eth0 lladdr f8:1a:67:91:f4:22 router STALE fe80::8cae:84ff:fe43:27d4 dev eth0 lladdr f8:1a:67:91:f4:22 router DELAY
The fc00 address is roughly the equivalent of an RFC1918 dsitto, and it looks like it was assigned according to the rules for constructing a link-local address from the MAC. The fe80 is the link-local address, which appears have been constructed from a random MAC address?? -- Per Jessen, Zürich (8.9°C) http://www.hostsuisse.com/ - virtual servers, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
20.03.2016 15:37, Carlos E. R. пишет:
On 2016-03-20 00:39, Florian Gleixner wrote:
On 03/19/2016 08:54 PM, Carlos E. R. wrote:
I just told my router to send log entries to a computer on my lan, and it is talkative:
<3.4> 2016-03-19T20:24:50+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4
You have more than one device, that sends router advertisements or dhcp answers. See man radvd -> AdvOtherConfigFlag on|off
When set, hosts use the administered (stateful) protocol for autoconfiguration of other (non-address) information. The use of this flag is described in RFC 4862.
and i think the flag controls how RFC 4862 section 5.6 is managed.
Ah, it is starting to make sense! Kind of. I do have two routers, yes. One is the actual router, connected to my ISP fibre, the other is only acting as a WiFi access point, not as router (its WAN is disconnected).
But the IP that the message is reporting, fe80::8cae:84ff:fe43:27d4, happens to belong to my switch, not the router.
No, according to neighbor information you sent it is your wireless AP:
Telcontar:~ # ip neighbour show fe80::8cae:84ff:fe43:27d4 dev eth0 lladdr f8:1a:67:91:f4:22 router DELAY 192.168.1.5 dev eth0 lladdr f8:1a:67:91:f4:22 STALE <==== wifi AP.
ISP--fibre--[Main router]---[switch]---[R-W-A.P.]--
My computer is connected to the switch.
On the "Router-WiFi-Access Point" I have dhcp disabled on IPv4. However, it is impossible to disable RADVD, which is used for IPv6, and is the culprit here.
The configuration page says (TD-W8970):
+++...................... IPv6 LAN Settings
The parameters of IPv6 LAN can be configured on this page.
Note: Only default group supports IPv6 now.
Group: Default Address Autoconfiguration Type: (*) RADVD () DHCPv6 Server
What happens if you change it to "DHCPv6 Server"? I expect it to stop sending RA.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Content-ID: <alpine.LSU.2.20.1603202154550.14097@Grypbagne.inyvabe> On Sunday, 2016-03-20 at 16:40 +0300, Andrei Borzenkov wrote:
20.03.2016 15:37, Carlos E. R. пишет:
On 2016-03-20 00:39, Florian Gleixner wrote:
On 03/19/2016 08:54 PM, Carlos E. R. wrote:
Ah, it is starting to make sense! Kind of. I do have two routers, yes. One is the actual router, connected to my ISP fibre, the other is only acting as a WiFi access point, not as router (its WAN is disconnected).
But the IP that the message is reporting, fe80::8cae:84ff:fe43:27d4, happens to belong to my switch, not the router.
No, according to neighbor information you sent it is your wireless AP:
Telcontar:~ # ip neighbour show fe80::8cae:84ff:fe43:27d4 dev eth0 lladdr f8:1a:67:91:f4:22 router DELAY 192.168.1.5 dev eth0 lladdr f8:1a:67:91:f4:22 STALE <==== wifi AP.
Yes, but. The wireless access point does have a web page, for administrating it. On the other hand, http://[fe80::8cae:84ff:fe43:27d4%25eth0] http://192.168.1.6/ produce the same result (empty page). In fact, when I enter "http://[fe80::8cae:84ff:fe43:27d4%25eth0]" firefox converts it, after a long time, to "http://192.168.1.6/". I think it happens when I go to another tab. (Chrome refuses to open the page, it insists on browsing for that "text" instead). And "http://192.168.1.6/" is indeed the switch. However, the error reported in the router comes from talking to the oldrouter aka wifi access point, so it is very confusing.
ISP--fibre--[Main router]---[switch]---[R-W-A.P.]--
My computer is connected to the switch.
On the "Router-WiFi-Access Point" I have dhcp disabled on IPv4. However, it is impossible to disable RADVD, which is used for IPv6, and is the culprit here.
The configuration page says (TD-W8970):
+++...................... IPv6 LAN Settings
The parameters of IPv6 LAN can be configured on this page.
Note: Only default group supports IPv6 now.
Group: Default Address Autoconfiguration Type: (*) RADVD () DHCPv6 Server
What happens if you change it to "DHCPv6 Server"? I expect it to stop sending RA.
Let's try. [...] It refuses. It wants me to specify a WAN connection, and there is none. I could set the "Site Prefix Configuration Type" to static, but then I have to enter a site prefix and I have no idea what to type there. And it has to be something that does not interfer with the ISP Router to the outside. +++····························· IPv6 LAN Settings The parameters of IPv6 LAN can be configured on this page. Note: Only default group supports IPv6 now. Group: Default Address Autoconfiguration Type: ( ) RADVD (*) DHCPv6 Server Start IPv6 Address: ::7FFF(1~FFFE) End IPv6 Address: ::7FFE(1~FFFE) Leased Time: 86400 seconds (The default value is 86400) Site Prefix Configuration Type: ( ) Delegated (*) Static Site Prefix: [ ] <================================== Site Prefix Length: 64 ·····························++- I need a "Site Prefix" to make this work. Without it, it does not accept "Save" the config. The configuration on the ISP router is below (and the above should not conflict with the below config): +++····························· IPv6 LAN Auto Configuration Note: Stateful DHCPv6 is supported based on the assumption of prefix length less than or equal to 64. Interface ID does NOT support ZERO COMPRESSION "::". Please enter the complete information. For exampe: Please enter "0:0:0:2" instead of "::2". LAN IPv6 Link-Local Address Configuration (*) EUI-64 ( ) User Setting Interface Identifier: 0:0:0:1 Static LAN IPv6 Address Configuration Interface Address (prefix length is required): [_____] IPv6 LAN Applications [X] Enable DHCPv6 Server (*) Stateless Refresh Time (sec): 1440 ( ) Stateful Start interface ID: 0:0:0:21 End interface ID: 0:0:0:FE Leased Time (second): [X] Enable RADVD RA interval Min(sec): 3 RA interval Max(sec): 10 Reachable Time(ms): 0 Default Preference: Low [ ] MTU (bytes): [ ] Enable Prefix Length Relay [ ] Enable ULA Prefix Advertisement ( ) Randomly Generate ( ) Statically Configure Prefix: [_____] Preferred Life Time (hour): -1 Valid Life Time (hour): -1 [ ] Enable MLD Snooping ·····························++- This router, the ISP router, I can touch very little. The ISP does not want clients to touch it at all, in fact. It may affect cable TV settings and voice service. - -- Cheers, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlbvE/cACgkQtTMYHG2NR9VV1QCfVDob2O0qb1kpqggHl/ryrz4c VsAAnRSof7UmFfVzmlm0S/LvFoos7fJu =cG9c -----END PGP SIGNATURE-----
21.03.2016 00:19, Carlos E. R. пишет:
Content-ID: <alpine.LSU.2.20.1603202154550.14097@Grypbagne.inyvabe>
On Sunday, 2016-03-20 at 16:40 +0300, Andrei Borzenkov wrote:
20.03.2016 15:37, Carlos E. R. пишет:
On 2016-03-20 00:39, Florian Gleixner wrote:
On 03/19/2016 08:54 PM, Carlos E. R. wrote:
Ah, it is starting to make sense! Kind of. I do have two routers, yes. One is the actual router, connected to my ISP fibre, the other is only acting as a WiFi access point, not as router (its WAN is disconnected).
But the IP that the message is reporting, fe80::8cae:84ff:fe43:27d4, happens to belong to my switch, not the router.
No, according to neighbor information you sent it is your wireless AP:
Telcontar:~ # ip neighbour show fe80::8cae:84ff:fe43:27d4 dev eth0 lladdr f8:1a:67:91:f4:22 router DELAY 192.168.1.5 dev eth0 lladdr f8:1a:67:91:f4:22 STALE <==== wifi AP.
Yes, but.
The wireless access point does have a web page, for administrating it.
On the other hand,
http://[fe80::8cae:84ff:fe43:27d4%25eth0] http://192.168.1.6/
produce the same result (empty page). In fact, when I enter
Well, that's not exactly convincing. Show packet trace from client where you tried it. ...
ISP--fibre--[Main router]---[switch]---[R-W-A.P.]--
My computer is connected to the switch.
On the "Router-WiFi-Access Point" I have dhcp disabled on IPv4. However, it is impossible to disable RADVD, which is used for IPv6, and is the culprit here.
The configuration page says (TD-W8970):
+++...................... IPv6 LAN Settings
The parameters of IPv6 LAN can be configured on this page.
Note: Only default group supports IPv6 now.
Group: Default Address Autoconfiguration Type: (*) RADVD () DHCPv6 Server
What happens if you change it to "DHCPv6 Server"? I expect it to stop sending RA.
Let's try. [...] It refuses. It wants me to specify a WAN connection, and there is none. I could set the "Site Prefix Configuration Type" to static, but then I have to enter a site prefix and I have no idea what to type there. And it has to be something that does not interfer with the ISP Router to the outside.
Do you actually need IPv6? If not, nothing you enter here can interfere with anything. In any case, you had site prefix already, as shown in one of your previous mail; why not use it (it had been set there all the time)?
+++····························· IPv6 LAN Settings
The parameters of IPv6 LAN can be configured on this page. Note: Only default group supports IPv6 now.
Group: Default
Address Autoconfiguration Type: ( ) RADVD (*) DHCPv6 Server
Packet trace showing RA in both cases would be definitely helpful to understand what it actually does.
Start IPv6 Address: ::7FFF(1~FFFE) End IPv6 Address: ::7FFE(1~FFFE) Leased Time: 86400 seconds (The default value is 86400)
Site Prefix Configuration Type: ( ) Delegated (*) Static Site Prefix: [ ] <================================== Site Prefix Length: 64 ·····························++-
I need a "Site Prefix" to make this work. Without it, it does not accept "Save" the config.
Use the same site prefix as was configured before.
The configuration on the ISP router is below (and the above should not conflict with the below config):
+++····························· IPv6 LAN Auto Configuration Note: Stateful DHCPv6 is supported based on the assumption of prefix length less than or equal to 64. Interface ID does NOT support ZERO COMPRESSION "::". Please enter the complete information. For exampe: Please enter "0:0:0:2" instead of "::2". LAN IPv6 Link-Local Address Configuration (*) EUI-64 ( ) User Setting Interface Identifier: 0:0:0:1
Static LAN IPv6 Address Configuration Interface Address (prefix length is required): [_____]
IPv6 LAN Applications [X] Enable DHCPv6 Server (*) Stateless Refresh Time (sec): 1440 ( ) Stateful Start interface ID: 0:0:0:21 End interface ID: 0:0:0:FE Leased Time (second):
[X] Enable RADVD RA interval Min(sec): 3 RA interval Max(sec): 10 Reachable Time(ms): 0 Default Preference: Low [ ] MTU (bytes): [ ] Enable Prefix Length Relay
[ ] Enable ULA Prefix Advertisement ( ) Randomly Generate ( ) Statically Configure Prefix: [_____] Preferred Life Time (hour): -1 Valid Life Time (hour): -1
[ ] Enable MLD Snooping
·····························++-
If the only problem is to avoid these log messages from router, you may simply reconfigure it to use DHCP + RADVD.
This router, the ISP router, I can touch very little. The ISP does not want clients to touch it at all, in fact. It may affect cable TV settings and voice service.
-- Cheers, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Content-ID: <alpine.LSU.2.20.1603211939040.14097@Grypbagne.inyvabe> On Monday, 2016-03-21 at 06:32 +0300, Andrei Borzenkov wrote:
produce the same result (empty page). In fact, when I enter
Well, that's not exactly convincing. Show packet trace from client where you tried it. ...
And you were right. See the other post when we found it was the wireless router by unplugging everything from the switch and pinging, then connecting things back...
Let's try. [...] It refuses. It wants me to specify a WAN connection, and there is none. I could set the "Site Prefix Configuration Type" to static, but then I have to enter a site prefix and I have no idea what to type there. And it has to be something that does not interfer with the ISP Router to the outside.
Do you actually need IPv6? If not, nothing you enter here can interfere with anything. In any case, you had site prefix already, as shown in one of your previous mail; why not use it (it had been set there all the time)?
Ah! I do not actually need it, but that router config page does not allow removing it. Wait, site prefix was always blank. I have entered "0:0:0:0::". Messages do not stop. <3.4> 2016-03-21T19:43:46+01:00 router radvd 675 - - our AdvManagedFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <1.4> 2016-03-21T19:43:53.768558+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <3.4> 2016-03-21T19:43:55+01:00 router radvd 675 - - our AdvManagedFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4
+++····························· IPv6 LAN Settings
The parameters of IPv6 LAN can be configured on this page. Note: Only default group supports IPv6 now.
Group: Default
Address Autoconfiguration Type: ( ) RADVD (*) DHCPv6 Server
Packet trace showing RA in both cases would be definitely helpful to understand what it actually does.
Dificult...
Start IPv6 Address: ::7FFF(1~FFFE) End IPv6 Address: ::7FFE(1~FFFE) Leased Time: 86400 seconds (The default value is 86400)
Site Prefix Configuration Type: ( ) Delegated (*) Static Site Prefix: [ ] <================================== Site Prefix Length: 64 ·····························++-
I need a "Site Prefix" to make this work. Without it, it does not accept "Save" the config.
Use the same site prefix as was configured before.
There was never anything there. I tried, if I leave it to automatics it is not filled.
The configuration on the ISP router is below (and the above should not conflict with the below config):
+++····························· IPv6 LAN Auto Configuration Note: Stateful DHCPv6 is supported based on the assumption of prefix length less than or equal to 64. Interface ID does NOT support ZERO COMPRESSION "::". Please enter the complete information. For exampe: Please enter "0:0:0:2" instead of "::2". LAN IPv6 Link-Local Address Configuration (*) EUI-64 ( ) User Setting Interface Identifier: 0:0:0:1
Static LAN IPv6 Address Configuration Interface Address (prefix length is required): [_____]
IPv6 LAN Applications [X] Enable DHCPv6 Server (*) Stateless Refresh Time (sec): 1440 ( ) Stateful Start interface ID: 0:0:0:21 End interface ID: 0:0:0:FE Leased Time (second):
[X] Enable RADVD RA interval Min(sec): 3 RA interval Max(sec): 10 Reachable Time(ms): 0 Default Preference: Low [ ] MTU (bytes): [ ] Enable Prefix Length Relay
[ ] Enable ULA Prefix Advertisement ( ) Randomly Generate ( ) Statically Configure Prefix: [_____] Preferred Life Time (hour): -1 Valid Life Time (hour): -1
[ ] Enable MLD Snooping
·····························++-
If the only problem is to avoid these log messages from router, you may simply reconfigure it to use DHCP + RADVD.
It is either DHCP exclusive or RADVD, in the wifi AP. The ISP router as shown above I must not touch. The ISP router is in fact using both DHCP and RADV. What I could do is flash this "oldrouter" aka wifi AP with open software - - I forgot the exact name -, which probably allows me to do this without complaints. I have done it on another brand/model. But I wanted to avoid this hassle, the experience was not uneventfull (it needed lots of resources, the control web page would not run). - -- Cheers, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlbwQfAACgkQtTMYHG2NR9W8iwCdGvaGiznlj7xZ+troAgKEZgSd 7iEAnjTYX6D6GB1WNytDlcwGCG6GhLQB =fJWD -----END PGP SIGNATURE-----
21.03.2016 21:48, Carlos E. R. пишет:
Let's try. [...] It refuses. It wants me to specify a WAN connection, and there is none. I could set the "Site Prefix Configuration Type" to static, but then I have to enter a site prefix and I have no idea what to type there. And it has to be something that does not interfer with the ISP Router to the outside.
Do you actually need IPv6? If not, nothing you enter here can interfere with anything. In any case, you had site prefix already, as shown in one of your previous mail; why not use it (it had been set there all the time)?
Ah!
I do not actually need it, but that router config page does not allow removing it.
Wait, site prefix was always blank.
Really?
Site Prefix: fC00:0:0:0::
It's from your mail.
+++····························· IPv6 LAN Settings
The parameters of IPv6 LAN can be configured on this page. Note: Only default group supports IPv6 now.
Group: Default
Address Autoconfiguration Type: ( ) RADVD (*) DHCPv6 Server
Packet trace showing RA in both cases would be definitely helpful to understand what it actually does.
Dificult...
It should multicast it on all ports; why is it difficult? You should actually see it on any ethernet port connected to this AP; just connect any system there. It may even multicast it on wireless as well.
On 2016-03-21 20:14, Andrei Borzenkov wrote:
21.03.2016 21:48, Carlos E. R. пишет:
I do not actually need it, but that router config page does not allow removing it.
Wait, site prefix was always blank.
Really?
Site Prefix: fC00:0:0:0::
It's from your mail.
Oh. :-? Ah, I see. It was set to that at one time, but after it was was erased in one of the "clicks", it remains empty. It did not occur to me to look into my own emails to see if it was always empty. But it does not work. Both routers complain:
<3.4> 2016-03-21T20:21:03+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4 <1.4> 2016-03-21T20:21:10.407283+01:00 oldrouter - - - IGMP: V2 igmp router occured! Not matching ours V3. <3.4> 2016-03-21T20:21:13+01:00 router radvd 675 - - our AdvOtherConfigFlag on br0 doesn't agree with fe80::8cae:84ff:fe43:27d4
+++····························· IPv6 LAN Settings
The parameters of IPv6 LAN can be configured on this page. Note: Only default group supports IPv6 now.
Group: Default
Address Autoconfiguration Type: ( ) RADVD (*) DHCPv6 Server
Packet trace showing RA in both cases would be definitely helpful to understand what it actually does.
Dificult...
It should multicast it on all ports; why is it difficult? You should actually see it on any ethernet port connected to this AP; just connect any system there. It may even multicast it on wireless as well.
Is that a multicast package? Oh, I see. What do I filter for? There is a lot of traffic going on. Sorry, I'm a bit thick on this O:-) -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)
Carlos E. R. wrote:
On the other hand,
http://[fe80::8cae:84ff:fe43:27d4%25eth0] http://192.168.1.6/
produce the same result (empty page). In fact, when I enter "http://[fe80::8cae:84ff:fe43:27d4%25eth0]" firefox converts it, after a long time, to "http://192.168.1.6/". I think it happens when I go to another tab.
That is likely a redirect from the webserver. Which FF are you using, I'm amazed it works with that URL.
(Chrome refuses to open the page, it insists on browsing for that "text" instead).
Yep, I saw that too. -- Per Jessen, Zürich (4.1°C) http://www.hostsuisse.com/ - dedicated server rental in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday, 2016-03-21 at 08:19 +0100, Per Jessen wrote:
Carlos E. R. wrote:
On the other hand,
http://[fe80::8cae:84ff:fe43:27d4%25eth0] http://192.168.1.6/
produce the same result (empty page). In fact, when I enter "http://[fe80::8cae:84ff:fe43:27d4%25eth0]" firefox converts it, after a long time, to "http://192.168.1.6/". I think it happens when I go to another tab.
That is likely a redirect from the webserver. Which FF are you using, I'm amazed it works with that URL.
And you were right, it was a wrong interpretation of the results. :-( The cable pulling technique was what worked. - -- Cheers, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlbwP8IACgkQtTMYHG2NR9UHyQCfV1d07Dovf9bthBk2cGc6XpgL foEAnAmbJAH/o4Vjhq28BnNUmByLeWHC =DZZ3 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 03/21/2016 02:38 PM, Carlos E. R. wrote:
The cable pulling technique was what worked.
That's why I suggested it. So, what was the source? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday, 2016-03-21 at 17:40 -0400, James Knott wrote:
On 03/21/2016 02:38 PM, Carlos E. R. wrote:
The cable pulling technique was what worked.
That's why I suggested it. So, what was the source?
It was on another mail. The oldrouter aka wifi AP. - -- Cheers, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlbwa6IACgkQtTMYHG2NR9WLRQCfZn8G8bIBOyPhs1ate7qqs1ks BpMAoJWleBv49lBY6YGfhDY17sGF4rNe =QDkQ -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 03/20/2016 08:37 AM, Carlos E. R. wrote:
But the IP that the message is reporting, fe80::8cae:84ff:fe43:27d4, happens to belong to my switch, not the router.
ISP--fibre--[Main router]---[switch]---[R-W-A.P.]--
My computer is connected to the switch.
Are you certain it's the switch? The way to check is to disconnect everything from the switch, except that computer. If those packets are still there, then they're from the switch. If not, then from some other device. Also, I find that locally administered MAC address puzzling. Why would any "out of the box" device have one? Normally you'd have to manually configure it. This used to happen years ago, to isolate networks with non-routed protocols and the configured MAC address was used for routing purposes. With routed protocols, such as IP, that is no longer necessary. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
20.03.2016 16:43, James Knott пишет:
Also, I find that locally administered MAC address puzzling.
It is not MAC, it is IPv6 address. At the end it can contain anything, nowhere is it mandated that it must be valid MAC. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 03/20/2016 09:45 AM, Andrei Borzenkov wrote:
20.03.2016 16:43, James Knott пишет:
Also, I find that locally administered MAC address puzzling. It is not MAC, it is IPv6 address. At the end it can contain anything, nowhere is it mandated that it must be valid MAC.
No, if it's a MAC address it's supposed to follow certain rules, including setting the 7th bit to one for locally managed MACs. When the MAC is used to to form an IPv6 link local address, that 7th bit will be inverted, which is why I pointed out 8c vs 8e earlier. While it's certainly possible to create a link local address by other means, the address Carlos provided included fffe in the middle of the MAC portion, which indicates the link local address was created from the MAC and not by other means. That fffe is not supposed to be used for any other purpose. I just took a look at the IPv6 addresses for my computer. It has one link local address and one unicast address, both based on the MAC address and with fffe inserted and with MAC bit 7 inverted, along with several random number based unicast addresses, without fffe inserted. Those random number addresses are generated periodically, with older ones eventually falling off the list. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 03/20/2016 10:11 AM, James Knott wrote:
20.03.2016 16:43, James Knott пишет:
Also, I find that locally administered MAC address puzzling. It is not MAC, it is IPv6 address. At the end it can contain anything, nowhere is it mandated that it must be valid MAC. No, if it's a MAC address it's supposed to follow certain rules, including setting the 7th bit to one for locally managed MACs. When the MAC is used to to form an IPv6 link local address, that 7th bit will be inverted, which is why I pointed out 8c vs 8e earlier. While it's certainly possible to create a link local address by other means, the address Carlos provided included fffe in the middle of the MAC portion, which indicates the link local address was created from the MAC and not by other means. That fffe is not supposed to be used for any other
On 03/20/2016 09:45 AM, Andrei Borzenkov wrote: purpose. I just took a look at the IPv6 addresses for my computer. It has one link local address and one unicast address, both based on the MAC address and with fffe inserted and with MAC bit 7 inverted, along with several random number based unicast addresses, without fffe inserted. Those random number addresses are generated periodically, with older ones eventually falling off the list.
This article explains the IPv6 address structure: http://packetlife.net/blog/2008/aug/4/eui-64-ipv6/ -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
Telcontar:~ # nmap -A -T4 -6 "fe80::8cae:84ff:fe43:27d4"
Starting Nmap 6.40 ( http://nmap.org ) at 2016-03-19 20:37 CET Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn Nmap done: 1 IP address (0 hosts up) scanned in 2.00 seconds Telcontar:~ # ....++-
which is false, it responds to ping.
Did you try with -Pn? I know it responded to your pings earlier but does nmap work with that option set? -- Regards, Uzair Shamim
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday, 2016-03-20 at 11:14 -0400, Uzair Shamim wrote:
On 03/19/2016 03:54 PM, Carlos E. R. wrote:
Telcontar:~ # nmap -A -T4 -6 "fe80::8cae:84ff:fe43:27d4"
Starting Nmap 6.40 ( http://nmap.org ) at 2016-03-19 20:37 CET Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn Nmap done: 1 IP address (0 hosts up) scanned in 2.00 seconds Telcontar:~ # ....++-
which is false, it responds to ping.
Did you try with -Pn? I know it responded to your pings earlier but does nmap work with that option set?
Telcontar:~ # nmap -A -T4 -Pn -6 "fe80::8cae:84ff:fe43:27d4" Starting Nmap 6.40 ( http://nmap.org ) at 2016-03-20 21:51 CET Nmap done: 1 IP address (0 hosts up) scanned in 1.93 seconds Telcontar:~ # - -- Cheers, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlbvDW4ACgkQtTMYHG2NR9UMxgCeMzmhiHX6fdGHoNNYDTazVuWO PFAAn0rGKKLnTz0nmFNq6iQQWZ24r2Jh =e8iv -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
participants (6)
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Andrei Borzenkov -
Carlos E. R. -
Florian Gleixner -
James Knott -
Per Jessen -
Uzair Shamim