Accessing some web sites with SuSE 7.0 does not work
Hi All, I have installed SuSE one one of my computers and have problem accessing some web sites such as www.sun.com and www.alltheweb.com. I have tried with netscape, Konqueror. lynx and telnet. lynx www.sun.com generates: looking up www.sun.com first looking up www.sun.com. making HTTP connection to www.sun.com. Alert!: Unable to connect to remote host. When trying to telnet to www.sun.com 80 I get a connection timed out telnet www.sun.com 80 Trying 192.18.97.241... telnet: connect to address 192.18.97.241: Connection timed out This means that the networking services work and the computer can resolve names to IP and I have a contact to the Internet. I do not understand this feature / bug and would appreciate if someone could help me with some suggestions :-) -- MVH/ Best regards Siavosh Akhtary Technical Account Manager Teraport Aktiebolag L. Bommen 6 SE-411 04 GÖTEBORG Sweden Phone: +46 31 745 01 10 Mobile: +46 70 569 72 61 Fax: +46 31 745 00 10 http://www.teraport.se
On Tue, Apr 17, 2001 at 01:23:27PM +0200, s.akhtary@teraport.se wrote:
I have installed SuSE one one of my computers and have problem accessing some web sites such as www.sun.com and www.alltheweb.com. I have tried with netscape, Konqueror. lynx and telnet. [snip] This means that the networking services work and the computer can resolve names to IP and I have a contact to the Internet. I do not understand this feature / bug and would appreciate if someone could help me with some suggestions :-)
Are you sure it's not an ISP routing problem? What web sites *can* you access? -- David Smith Tel: +44 (0)1454 462380 (direct) STMicroelectronics Fax: +44 (0)1454 617910 1000 Aztec West TINA (ST only): (065) 2380 Almondsbury Home: 01454 616963 BRISTOL Mobile: 07932 642724 BS32 4SQ Work Email: Dave.Smith@st.com Home Email: David.Smith@ds-electronics.co.uk
On Tue, Apr 17, 2001 at 12:27:51PM +0100, Dave Smith wrote:
On Tue, Apr 17, 2001 at 01:23:27PM +0200, s.akhtary@teraport.se wrote:
I have installed SuSE one one of my computers and have problem accessing some web sites such as www.sun.com and www.alltheweb.com. I have tried with netscape, Konqueror. lynx and telnet. [snip] This means that the networking services work and the computer can resolve names to IP and I have a contact to the Internet. I do not understand this feature / bug and would appreciate if someone could help me with some suggestions :-)
Are you sure it's not an ISP routing problem?
This is the right question. Please try: 1) dig www.sun.com You should get: ; <<>> DiG 8.3 <<>> www.sun.com ;; res options: init recurs defnam dnsrch ;; got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUERY SECTION: ;; www.sun.com, type = A, class = IN ;; ANSWER SECTION: www.sun.com. 15h16m55s IN A 192.18.97.241 ;; Total query time: 0 msec ;; FROM: home to SERVER: default -- 192.168.16.3 ;; WHEN: Sun Apr 22 23:37:29 2001 ;; MSG SIZE sent: 29 rcvd: 45 2) dig www.alltheweb.com You should get: ; <<>> DiG 8.3 <<>> www.alltheweb.com ;; res options: init recurs defnam dnsrch ;; got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUERY SECTION: ;; www.alltheweb.com, type = A, class = IN ;; ANSWER SECTION: www.alltheweb.com. 1D IN A 209.202.148.99 ;; Total query time: 42 msec ;; FROM: home to SERVER: default -- 192.168.16.3 ;; WHEN: Sun Apr 22 23:38:22 2001 ;; MSG SIZE sent: 35 rcvd: 51 3) Now, do a traceroute to each site.
What web sites *can* you access?
Let's try to narrow this down a bit. Can you reach yahoo.com? How about google.com? -- David Benfell benfell@parts-unknown.org --- Resume available at http://www.parts-unknown.org/resume.html
On Sun, 22 Apr 2001, David Benfell wrote:
On Tue, Apr 17, 2001 at 12:27:51PM +0100, Dave Smith wrote:
On Tue, Apr 17, 2001 at 01:23:27PM +0200, s.akhtary@teraport.se wrote:
I have installed SuSE one one of my computers and have problem accessing some web sites such as www.sun.com and www.alltheweb.com. I have tried with netscape, Konqueror. lynx and telnet. [snip] This means that the networking services work and the computer can resolve names to IP and I have a contact to the Internet. I do not understand this feature / bug and would appreciate if someone could help me with some suggestions :-)
Are you sure it's not an ISP routing problem?
This is the right question. Please try: /snip/ dig and traceroute suggested.
This sounds suspiciously like a problem I was having with support.hp.com a month or so ago. As it turned out, I had been trying to 'optimize' my ppp link to my ISP, and I had changed ppp.options to force an MTU smaller than the 1500 byte default. I had read that smaller MTU was more efficient on slower links. What I discovered was that some firewall designers have decided that the ICMP protocol is 'evil', probably because they once heard about flood-pinging DoS attacks. So they block all ICMP in their firewall. And the result is that 'path MTU discovery', which is a part of the REQUIRED set of IP protocols, breaks. The symptoms I saw were connection to the host, but just hanging as soon as the data began to transfer. I could get some pages, but not others. What was happening was that my pppd had negotiated an MTU with its peer, so whenever a larger packet got sent, it was rejected with a 'please fragment' request, which was summarily bit-bucketed by the overly-paranoid firewall. When I set my MTU back to the default 1500, I could again browse the HP and other sites which had been causing me problems. -- Rick Green "I have the heart of a little child, and the brain of a genius. ... and I keep them in a jar under my bed"
participants (4)
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Dave Smith -
David Benfell -
Rick Green -
Siavosh Akhtary