[networking] Computer can't see the outside world any more
Hi all, I have a debian server running as a web server on a company network. The computer has previously been set up as visible to the outside world, and everything was fine until yesterday. I noticed yesterday that our home page was showing an error saying it couldn't connect to an external database it pulls some content from. The external site was working fine, so I restarted apache (no diffference) and then restarted the computer. After restart, the computer failed to pick up an IP address from the DHCP server, /etc/networking/interfaces looks like # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet dhcp Now the strange thing is that, from logging into the server, I can ping any local address except for the DHCP server and the default gateway. I can't ping any global addresses, but this is obviously a symptom of not being able to reach the gateway. Another machine plugged into the same hub as the web server has no problem reaching any address, local or global. The guys up in IT say nothing has changed in their settings at all. There haven't been any network related changes to the server in quite a while. Where do people think I should start looking? No one here has any idea. Thanks, Gareth Adams
Re: [networking] Computer can't see the outside world any more
On Wed, 2005-08-10 at 11:19 +0100, Gareth Adams wrote: ... Now the strange thing is that, from logging into the server, I can ping any local address except for the DHCP server and the default gateway. I can't ping any global addresses, but this is obviously a symptom of not being able to reach the gateway. Another machine plugged into the same hub as the web server has no problem reaching any address, local or global. ... Where do people think I should start looking? No one here has any idea. How about setting it up with a static IP address and see if it works like that? (The DHCP server can be configured to avoid that address.) You could also try running tcpdump on another machine to see if packets from the web-server appear on the network. -- Oliver Elphick olly@lfix.co.uk Isle of Wight http://www.lfix.co.uk/oliver GPG: 1024D/A54310EA 92C8 39E7 280E 3631 3F0E 1EC0 5664 7A2F A543 10EA Do you want to know God? http://www.lfix.co.uk/knowing_god.html -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: [networking] Computer can't see the outside world any more
Never mind, we've got a phone call saying the firewall auto-blocked us, and we're now trying to work out why. Thanks for the suggestion, anyway On 8/10/05, Oliver Elphick olly@lfix.co.uk wrote: On Wed, 2005-08-10 at 11:19 +0100, Gareth Adams wrote: ... Now the strange thing is that, from logging into the server, I can ping any local address except for the DHCP server and the default gateway. I can't ping any global addresses, but this is obviously a symptom of not being able to reach the gateway. Another machine plugged into the same hub as the web server has no problem reaching any address, local or global. ... Where do people think I should start looking? No one here has any idea. How about setting it up with a static IP address and see if it works like that? (The DHCP server can be configured to avoid that address.) You could also try running tcpdump on another machine to see if packets from the web-server appear on the network. -- Oliver Elphick olly@lfix.co.uk Isle of Wight http://www.lfix.co.uk/oliver GPG: 1024D/A54310EA 92C8 39E7 280E 3631 3F0E 1EC0 5664 7A2F A543 10EA Do you want to know God? http://www.lfix.co.uk/knowing_god.html -- Gareth Adams [E] [EMAIL PROTECTED] [T] 01392 66 43 19 [M] 07903 86 00 35
