Was working fine then stopped inexplicably.
I can ping the gateway/DNS router/firewall (Untangle) using WiFi and cable using WiCd. Network Manager does not work on this computer
Firefox reports "server not found" & pinging google.com gives "unknown host".
WiCd setting show proper DNS IP, /etc/reslov.conf contains the correct IP (it was missing but I replaced it).
The DNS server/gateway (192.168.0.1) works with other computers on the local network.
From laptop (192.168.0.55)…
user@laptop:~$ cat /etc/resolv.conf # Generated by NetworkManager nameserver 192.168.0.1 user@laptop:~$ ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. 64 bytes from 192.168.0.1: icmp_req=1 ttl=64 time=0.854 ms 64 bytes from 192.168.0.1: icmp_req=2 ttl=64 time=0.875 ms user@laptop:~$ ping 192.168.0.5 PING 192.168.0.5 (192.168.0.5) 56(84) bytes of data. 64 bytes from 192.168.0.5: icmp_req=1 ttl=64 time=0.774 ms 64 bytes from 192.168.0.5: icmp_req=2 ttl=64 time=0.747 ms
From workstation (192.168.0.5)…
user@workstation:~$ ping 192.168.0.55 PING 192.168.0.55 (192.168.0.55) 56(84) bytes of data. 64 bytes from 192.168.0.55: icmp_req=1 ttl=64 time=0.754 ms 64 bytes from 192.168.0.55: icmp_req=2 ttl=64 time=0.720 ms user@workstation:~$ ping google.com PING google.com (220.127.116.11) 56(84) bytes of data. 64 bytes from nuq04s08-in-f14.1e100.net (18.104.22.168): icmp_req=1 ttl=46 time=90.6 ms 64 bytes from nuq04s08-in-f14.1e100.net (22.214.171.124): icmp_req=2 ttl=46 time=92.2 ms
user@laptop:~$ ping 126.96.36.199 PING 188.8.131.52 (184.108.40.206) 56(84) bytes of data. 64 bytes from 220.127.116.11: icmp_req=1 ttl=46 time=105 ms 64 bytes from 18.104.22.168: icmp_req=2 ttl=46 time=91.5 ms 64 bytes from 22.214.171.124: icmp_req=3 ttl=46 time=92.2 ms 64 bytes from 126.96.36.199: icmp_req=4 ttl=46 time=89.3 ms
And also from laptop (using sudo)…
root@laptop:~# ps -e | grep bind root@laptop:~# ps -e | grep net 17 ? 00:00:00 netns root@laptop:~#
The laptop is dual boot, and with the same hardware Windows has no DNS problems. Also, there are three connection methods to the internet, two WiFi APs and a wired connection. This problem occurs on all three.
Skype seems to work, having no problems connecting to its network.
This Lenovo S12 (Intel atom) laptop does not seem to play nice with Linux/Ubuntu as several custom work-arounds are required to get Ubuntu working ⋯ e.g. needing WiCd because Network Manager does not work. More here, here, here, and here.