Ubuntu 7.10 or later on T23 ethernet problem...

[Wookie]

Hi

I used to have 7.04 on my T23 and it worked fine. I decided to upgrade to 7.10 and can't get the ethernet network to work fully.

I can ping another machine and telnet to another machine (either local or on the internet) but that's it, I can't get on the web or email etc.

With 7.04 ethernet works fine, just not with 7.10 or later, any ideas ?

[ajkula66]

Static IP or dynamic one for your LAN connection?

[Wookie]

Static IP or dynamic one for your LAN connection?

I usually stick to static addresses, I have just tried using DHCP instead only to get the exact same problem

Thanks for your suggestion...

[Wookie]

Given up, fed up, gone back to 7.04

[lightweight]

Sure it wasn't DNS (/etc/resolv.conf)? Did you telnet and ssh to domain names or ips on the internet?

[Wookie]

Sure it wasn't DNS (/etc/resolv.conf)? Did you telnet and ssh to domain names or ips on the internet?

Fairly sure, I always use ip addresses on my local net, but I did try both names & numbers on the internet to no success, I never thought to try http on my local net. I'll have a play with a live cd later...

[Wookie]

Just tried 8.04 live CD, I can http on my local ethernet but no joy on the WWW. I set my dns as the router I use to get on the internet and secondary to my isp's dns.

[lightweight]

For clarity, you did successfully ping and telnet to the Internet, correct? I've not hunted for bug reports or anything on Ubuntu's 8 but it's an interesting problem since, as you know, http/:80 is just a TCP connection, like your telnet sessions to the Internet. There's definitely no proxy (such as Squid) on your network, correct?

Could just isolate to narrow your search. See if you can get out over port 80. There's better tools for this (netcat, dig, nmap, etc) by the way, but using old standards as I'm not sure what's in Ubuntu's base.

See if you can go out on the internets on port 80:

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telnet forum.thinkpads.com 80

If not, you're probably looking at a firewall or proxy issue, but if no dice see if it's DNS by quering your local dns server then a machine on the intarwebs:

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nslookup forum.thinkpads.com
nslookup forum.thinkpads.com 4.2.2.2

And if local fails but the external doesn't, try changing /etc/resolv.conf. It also wouldn't hurt to turn off local dns searches while at it:

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sudo cp /etc/resolv.conf /etc/resolv.bak ; sudo perl -pi -e 's/^(search|domain.*)/#$1/g' /etc/resolv.conf

You can edit or copy the file back later when done troubleshooting, or just grab a new dhcp lease.

Also isolate if its the browser: (I do not know which Ubuntu ships with.)

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wget http://forum.thinkpads.com || curl http://forum.thinkpads.com

[Wookie]

Aparently it's a problem with the ethernet driver module, e100, it's broke in the later versions of Ubuntu. Looks like I'm stuck using 7.04 for the moment.

[Wookie]

I have now tried a Dlink pcmcia card, that uses a module called "tulip" I could connect to some websites, but not to others

I can also connect to one of the web servers on my local network (using the number address) but couldn't connect to the other web server

I'll gonna reboot now and try lightweight's suggestions.

[Wookie]

Thanks for all the suggestions, since I'm using a live cd of 8.04, I can't save any of the output so I write it down and then have to reboot to connect to the internet to post this message, so a) its a slow way and b) apologies for any mistakes i make...

telnet forum.thinkpads.com 80

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connected to alto.csdatamanagers.com

(and then nothing else happens)

nslookup forum.thinkpads.com

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server: 192.168.1.1
address: 192.168.1.1#53
Non-autoritive answer: forum.thinkpads.com  canonical name=alto.csdatamanagers.com
Name: alto.csdatamanagers.com
Address: 216.229.83.236

nslookup forum.thinkpads.com 4.2.2.2

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server: 4.2.2.2
address: 4.2.2.2#53
Non-autoritive answer: forum.thinkpads.com  canonical name=alto.csdatamanagers.com
Name: alto.csdatamanagers.com
Address: 216.229.83.236

sudo cp /etc/resolv.conf /etc/resolv.bak ; sudo perl -pi -e 's/^(search|domain.*)/#$1/g' /etc/resolv.conf

Didn't make any difference that I could tell

wget http://forum.thinkpads.com || curl http://forum.thinkpads.com[/code]

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--20:43:12-- http://forum.thinkpads.com/
=> 'index.html'
Resolving forum.thinkpads.com... 216.229.83.236
Connecting to forum.thinkpads.com|216.229.83.236|:80... connected.
HTTP request sent, awaiting responce...

(and then nothing else happens)