On Fri, Oct 06, 2006 at 09:10:33AM +0100, Brett Parker wrote:
On Fri, Oct 06, 2006 at 08:46:40AM +0100, cl@isbd.net wrote:
Do ping and traceroute use UDP? If so it would seem that UDP is working OK but that TCP isn't.
Ping is ICMP, traceroute is UDP, grab tcptraceroute... if that doesn't work then you've got a TCP problem, this is *not* routing, though, as ICMP and UDP can traverse, this limits it to a firewall, and I'd assume that it's your gateway device.
The gateway is a router, already in use by two or three other systems on the network with no problems. That was my first thought in fact so I checked that the router firewall setup was the same for the new Linux box as for the other systems - it is.
I have checked repeatedly that the system with a problem has got the router's IP address as its default gateway too. (Anyway as non-TCP works surely the gateway must be set right)
Everything is on the same 192.168.1.0 subnet, the router (i.e. gateway) is 192.168.1.254. There are happily working Windows and Linux systems at 192.168.1.11, 192.168.1.1 and 192.168.1.4. The system that is not working is at 192.168.1.64. I have had other Linux distributions working OK in the same box at the same IP address so it's almost certainly something adrift in the installation itself I suspect.
(N.B. I have DHCP turned off for everything and fixed IP for all my systems)