[sf-lug] resolver problem

[Alex Kleider]

I've got a vexing little problem with which perhaps someone on this
list might be able to help.

My ubuntu 14.4 system has been booting without network configuration
which I have been _assuming_ was due to a failed wifi module.
So I switched to an ethernet cable connection which seems to work sort
of!

Chromium works but Firefox seems not to "see" the internet!
So I stopped using Firefox and switched to Chromium.

Then I had occasion to push something to github and got into
problems:

git push
fatal: unable to access 'https://github.com/alexKleider/debk.git/':
Could not resolve host: github.com

ping github.com   # succeeds; (although last quad varies)
PING github.com (192.30.252.130) 56(84) bytes of data.
64 bytes from github.com (192.30.252.130): icmp_seq=1 ttl=53 time=86.9 
ms
64 bytes from github.com (192.30.252.130): icmp_seq=2 ttl=53 time=87.7 
ms
64 bytes from github.com (192.30.252.130): icmp_seq=3 ttl=53 time=87.2 
ms
64 bytes from github.com (192.30.252.130): icmp_seq=4 ttl=53 time=87.6 
ms
64 bytes from github.com (192.30.252.130): icmp_seq=6 ttl=53 time=87.0 
ms
64 bytes from github.com (192.30.252.130): icmp_seq=7 ttl=53 time=87.5 
ms
^C
--- github.com ping statistics ---
7 packets transmitted, 7 received, 0% packet loss, time 5999ms
rtt min/avg/max/mdev = 86.967/87.428/87.797/0.391 ms

dig github.com @127.0.0.1 +short

; <<>> DiG 9.9.5-3ubuntu0.7-Ubuntu <<>> github.com @127.0.0.1 +short
;; global options: +cmd
;; connection timed out; no servers could be reached

dig github.com @10.0.0.2 +short   # My router
192.30.252.131

I'm able to get around the problem by adding the line
192.30.252.131 github.com
to my /etc/hosts file

But I'd sure like to know the root of the problem and fix it if
possible.

Thanks for any help anyone might be able to provide.

Alex