[opensuse] Networking Reachability Problem
Hi, I have an odd problem that I don't understand and wonder if anyone can shed some light on it. Here's the setup: - 2 systems: one runs SuSE Linux 10.0 and the other openSUSE 10.3 - Four static IP addresses assigned by my ISP (using ADSL) - An IOGear Ethernet switch connecting the DSL modem to everything else - A LinkSys WRT54G wireless router / access point w/ 4 hard-wired ports - The 10.0 box has a single ethernet port connected to the IOGear switch - The 10.3 box has two ethernet ports, one connected to the IOGear switch (and hence directly to the Internet) and the other connected by cable to the LinkSys router - The router, the 10.0 box and port of the 10.3 box wired directly to the IOGear switch each have statically configured IP addresses - Everything accessing the Internet via the LinkSys router / access point (including a couple of Macs, my TiVO and one of the ports on the 10.3 box) use DHCP. The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box. Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_. Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet? Thanks. Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, 2007-11-04 at 09:58 -0800, Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
Here's the setup:
- 2 systems: one runs SuSE Linux 10.0 and the other openSUSE 10.3 - Four static IP addresses assigned by my ISP (using ADSL) - An IOGear Ethernet switch connecting the DSL modem to everything else - A LinkSys WRT54G wireless router / access point w/ 4 hard-wired ports - The 10.0 box has a single ethernet port connected to the IOGear switch - The 10.3 box has two ethernet ports, one connected to the IOGear switch (and hence directly to the Internet) and the other connected by cable to the LinkSys router - The router, the 10.0 box and port of the 10.3 box wired directly to the IOGear switch each have statically configured IP addresses - Everything accessing the Internet via the LinkSys router / access point (including a couple of Macs, my TiVO and one of the ports on the 10.3 box) use DHCP.
The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box.
Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_.
Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet?
Thanks.
Randall Schulz The first thing I would do is /sbin/ifconfig on the 10.3 box. This will allow you to determine the real state of the ethernet ports. -- Joseph Loo jloo@acm.org
-- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
Here's the setup:
- 2 systems: one runs SuSE Linux 10.0 and the other openSUSE 10.3 - Four static IP addresses assigned by my ISP (using ADSL) - An IOGear Ethernet switch connecting the DSL modem to everything else - A LinkSys WRT54G wireless router / access point w/ 4 hard-wired ports - The 10.0 box has a single ethernet port connected to the IOGear switch - The 10.3 box has two ethernet ports, one connected to the IOGear switch (and hence directly to the Internet) and the other connected by cable to the LinkSys router - The router, the 10.0 box and port of the 10.3 box wired directly to the IOGear switch each have statically configured IP addresses - Everything accessing the Internet via the LinkSys router / access point (including a couple of Macs, my TiVO and one of the ports on the 10.3 box) use DHCP.
The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box.
Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_.
Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet?
Thanks.
Randall Schulz
Ok text pictures.... Machine A 10.3 <----->IOGear<-----> RestofWorld ^ ^ | | V V Wireless AP Router Machine B 10.0 ^ | V I assume A is routing? I would have a look at the routing table on A. My guess is that A's information on where to route its traffic is ambiguous especially if you have two addresses assigned on the same IP subnet on both ports.... IMHO If you have all 4 address on the same subnet the best solution probably is to bridge A (it will appear to only have one address). - -- ============================================================================== I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone. Bjarne Stroustrup ============================================================================== -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFHLtjXasN0sSnLmgIRAhqHAJ9ntwcHbP/c7PCWu0Ge6uThmpmM6wCgxTad fzmjrJnnXazSV06ayw9C5kA= =/U91 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 G T Smith wrote:
Randall R Schulz wrote:
Hi,
<snip>
IMHO If you have all 4 address on the same subnet the best solution probably is to bridge A (it will appear to only have one address).
scratch the above... I hate mondays... - -- ============================================================================== I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone. Bjarne Stroustrup ============================================================================== -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFHLtlmasN0sSnLmgIRAuciAKCTHKu1snI5Vnrw+/HVzvWRxquJcACgvn7r 4IioTTlZgnod1AU2z25pvgE= =r11g -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Monday 05 November 2007 00:48, G T Smith wrote:
Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
Here's the setup:
- 2 systems: one runs SuSE Linux 10.0 and the other openSUSE 10.3 - Four static IP addresses assigned by my ISP (using ADSL) - An IOGear Ethernet switch connecting the DSL modem to everything else - A LinkSys WRT54G wireless router / access point w/ 4 hard-wired ports - The 10.0 box has a single ethernet port connected to the IOGear switch - The 10.3 box has two ethernet ports, one connected to the IOGear switch (and hence directly to the Internet) and the other connected by cable to the LinkSys router - The router, the 10.0 box and port of the 10.3 box wired directly to the IOGear switch each have statically configured IP addresses - Everything accessing the Internet via the LinkSys router / access point (including a couple of Macs, my TiVO and one of the ports on the 10.3 box) use DHCP.
The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box.
Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_.
Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet?
Thanks.
Randall Schulz
Ok text pictures....
...
No, that's not the set-up. Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Monday 05 November 2007 00:48, G T Smith wrote:
Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
Here's the setup:
...
The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box.
Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_.
Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet?
Thanks.
Randall Schulz
Ok text pictures....
No OK in my book. I've attached a PNG image showing the topology of my network. Randall Schulz
On Monday 05 November 2007 06:36, Randall R Schulz wrote:
On Monday 05 November 2007 00:48, G T Smith wrote:
Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
Here's the setup:
...
The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box.
Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_.
Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet?
Here's something else that may be relevant: % netstat -A inet -a |egrep LISTEN tcp 0 0 *:mysql *:* LISTEN tcp 0 0 *:sunrpc *:* LISTEN tcp 0 0 localhost:ipp *:* LISTEN tcp 0 0 localhost:smtp *:* LISTEN % netstat -A inet6 -a |egrep LISTEN tcp 0 0 localhost:8005 *:* LISTEN tcp 0 0 *:8009 *:* LISTEN tcp 0 0 *:http-alt *:* LISTEN tcp 0 0 *:www-http *:* LISTEN tcp 0 0 *:7634 *:* LISTEN tcp 0 0 *:ssh *:* LISTEN tcp 0 0 localhost:ipp *:* LISTEN tcp 0 0 localhost:smtp *:* LISTEN The server I most need to contact is Tomcat running on port 8080 ("http-alt"). Why is it listening only on inet6 addresses? Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Tue, 6 Nov 2007, Randall R Schulz wrote:
On Monday 05 November 2007 00:48, G T Smith wrote:
Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
Here's the setup:
...
The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box.
Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_.
Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet?
Thanks.
Randall Schulz
Ok text pictures....
No OK in my book.
I've attached a PNG image showing the topology of my network.
Randall Schulz
Looking at your connection diagram, it appears as though you could have a routing loop if you really have 2 connections between the 8-port switch and the 10.3 box (one direct, one via the wireless router). What firmware are you running in the WRT54G? Is it configured to support spanning-tree routing? if not, try removing one of the links to the 10.3 box (probably the one to the wireless router). The wireless clients should be able to route to the 10.3 box via the ethernet switch. -- ============================================================= Rodney Baker VK5ZTV rodney.baker@optusnet.com.au ============================================================= -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
Here's the setup:
- 2 systems: one runs SuSE Linux 10.0 and the other openSUSE 10.3 - Four static IP addresses assigned by my ISP (using ADSL) - An IOGear Ethernet switch connecting the DSL modem to everything else - A LinkSys WRT54G wireless router / access point w/ 4 hard-wired ports - The 10.0 box has a single ethernet port connected to the IOGear switch - The 10.3 box has two ethernet ports, one connected to the IOGear switch (and hence directly to the Internet) and the other connected by cable to the LinkSys router - The router, the 10.0 box and port of the 10.3 box wired directly to the IOGear switch each have statically configured IP addresses - Everything accessing the Internet via the LinkSys router / access point (including a couple of Macs, my TiVO and one of the ports on the 10.3 box) use DHCP.
The problem (as far as I know, the _only_ problem with the whole setup) is that I cannot connect from the Internet to the 10.3 box using it's global, routable IP address, though there's no problem doing the same with the 10.0 box.
Furthermore, computers connected wirelessly to the LinkSys access point _can_ access the 10.3 box _using the global, routable IP address_.
Can anyone tell me what might be wrong with the configuration and how I might fix it so that the 10.3 box can be reached from the global Internet?
Thanks.
Randall Schulz
Do you have the routing tables for the devices? Have you done a traceroute to see where the routing goes (both directions) ? Regards Jeff -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sunday 04 November 2007 09:58, Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
...
Based on off-list correspondence with G. T. Smith, I have already removed the wire link from the broadband router to the 10.3 box. It wasn't worth the trouble it was causing and I don't have a lot of time to spend on it. My overriding concern is to make the 10.3 box reachable from the Internet. At some point, I may try to reestablish the DHCP link from the NAT side of the wireless router once I learn more about what's required to make such a topology function properly. On Wednesday 07 November 2007 02:19, Jeff Hoare wrote:
Do you have the routing tables for the devices? Have you done a traceroute to see where the routing goes (both directions) ?
Not any longer. Yesterday I removed the cable from the wireless router to the 10.3 box and disabled that interface. On Wednesday 07 November 2007 00:18, Rodney Baker wrote:
Looking at your connection diagram, it appears as though you could have a routing loop if you really have 2 connections between the 8-port switch and the 10.3 box (one direct, one via the wireless router).
Yes, I do. I did fail to mention that the wireless router is applying NAT and the DHCP-supplied IP addresses are non-routeable. The same page allows the establishment of up to twenty static routes, but I have none defined.
What firmware are you running in the WRT54G? Is it configured to support spanning-tree routing?
The main page of the configuration interface says "Firmware Version 1.00.6". On the Advanced Routing page, there are two modes Gateway and Router. It's set on Router
if not, try removing one of the links to the 10.3 box (probably the one to the wireless router). The wireless clients should be able to route to the 10.3 box via the ethernet switch.
I did that yesterday. It's working, but now I cannot access the NAT side of the wireless router from the 10.3 box, which was why I added the cable from that box to the wireless router. Thanks for the help, folks. Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Randall R Schulz wrote:
On Sunday 04 November 2007 09:58, Randall R Schulz wrote:
Hi,
I have an odd problem that I don't understand and wonder if anyone can shed some light on it.
...
Based on off-list correspondence with G. T. Smith, I have already removed the wire link from the broadband router to the 10.3 box. It wasn't worth the trouble it was causing and I don't have a lot of time to spend on it. My overriding concern is to make the 10.3 box reachable from the Internet.
At some point, I may try to reestablish the DHCP link from the NAT side of the wireless router once I learn more about what's required to make such a topology function properly.
On Wednesday 07 November 2007 02:19, Jeff Hoare wrote:
Do you have the routing tables for the devices? Have you done a traceroute to see where the routing goes (both directions) ?
Not any longer. Yesterday I removed the cable from the wireless router to the 10.3 box and disabled that interface.
One thing that's puzzled me about this correspondence is why you didn't provide any information about the interfaces or routing tables even when asked? It would have helped people help you. For people to understand how the network is set up and why it's not functioning right, it's useful to run something like: netstat -r /sbin/ifconfig /usr/sbin/traceroute <other-host-name> on each of the hosts that are involved and post the results. The method of getting similar information from a router depends on it's interface. I hope that will help anybody else with a similar problem and perhaps you if you try again. Cheers, Dave -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (6)
-
Dave Howorth -
G T Smith -
Jeff Hoare -
Joseph Loo -
Randall R Schulz -
Rodney Baker