Kubuntu can access LAN, but cannot access outside network

[Guest]

I have a strange problem -- I have set up an installation of Kubuntu 8.10 with a manual ip address:

# cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface eth0 inet static
address 192.168.0.100
netmask 255.255.255.0
gateway 192.168.0.1
broadcast 192.168.0.255

and I can ssh into the computer from the LAN (That's how it is primarily used). However, once I'm in, things start getting weird:

Pinging other computers on the LAN works ok:
user@user-laptop:~$ ping 192.168.0.103
PING 192.168.0.103 (192.168.0.103) 56(84) bytes of data.
64 bytes from 192.168.0.103: icmp_seq=1 ttl=64 time=1.37 ms
64 bytes from 192.168.0.103: icmp_seq=2 ttl=64 time=1.26 ms
--- 192.168.0.103 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1004ms
rtt min/avg/max/mdev = 1.265/1.318/1.371/0.053 ms
user@user-laptop:~$ ping 192.168.0.102
PING 192.168.0.102 (192.168.0.102) 56(84) bytes of data.
64 bytes from 192.168.0.102: icmp_seq=1 ttl=64 time=0.176 ms
64 bytes from 192.168.0.102: icmp_seq=2 ttl=64 time=0.332 ms
--- 192.168.0.102 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.176/0.254/0.332/0.078 ms

Pinging the router fails?
user@user-laptop:~$ ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
^C
--- 192.168.0.1 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 2999ms

Ping can't even resolve google:
user@user-laptop:~$ ping www.google.com # External network
^C

I can't figure out why I can see the other computers connected to the router, but not the router itself or the external network. It's not just ping, btw -- I noticed the problem trying to commit to my svn server as well. It was working fine from when I installed it about 2 weeks ago until yesterday. Nothing changed yesterday, it was just sitting, happily crunching numbers for my research all day.

Any ideas?

Dave

Any ideas

[Detonate]

Re: Kubuntu can access LAN, but cannot access outside network

It's a DNS issue. When you connect to your router with DHCP, the DNS entries in the router are automatically detected and saved on your computer in a file named /etc/resolv.conf.

When you connect with a fixed IP address this does not happen. See my post here about setting up you system to use a fixed IP and how to set up your resolv.conf file.

http://kubuntuforums.net/forums/inde...opic=3100052.0

[Guest]

Re: Kubuntu can access LAN, but cannot access outside network

Cool -- there was a mismatch between the router's DNS servers and those in resolv.conf. All's working now. Thanks!