Bristol Digest, Vol 572, Issue 3

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Today's Topics:

1. Mysterious DNS problem (Y Martin)


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Message: 1
Date: Fri, 17 Oct 2014 19:36:09 +0000
From: Y Martin <ym2013@riseup.net>
To: bristol@mailman.lug.org.uk
Subject: [bristol] Mysterious DNS problem
Message-ID: <54416FA9.8060708@riseup.net>
Content-Type: text/plain; charset=UTF-8

Hi

I've had a mysterious problem with DNS on my Debian PC not working for
over a week now and I havent been able to fix it :-(

I was wondering if there is someone out there that can shine a light on
this mystery for me.

It happened after I installed the VPN program called bitmask and this
bitmask wiki page makes me think it is the culpret:
https://bitmask.net/en/help/vpn/linux#dns
I lodged a bitmask bug report https://leap.se/code/issues/6197

So I can ping IPs (eg. 8.8.8.8) but not URLs ("ping: unknown host
www.google.com").
----------------------------------------------------------------------
Dig and nslookup dont seem to work:

$ dig www.google.com
; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> www.google.com
;; global options: +cmd
;; connection timed out; no servers could be reached

$ nslookup www.google.com
;; connection timed out; no servers could be reached
----------------------------------------------------------------------
My /etc/nsswitch.conf seems fine:

passwd: compat
group: compat
shadow: compat
hosts: files dns
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
----------------------------------------------------------------------
I thought dpkg restoring default settings might help but it didnt:

dpkg-reconfigure isc-dhcp-client
dpkg-reconfigure bind9
----------------------------------------------------------------------
iptables isnt dropping anything on port 53
----------------------------------------------------------------------

By the way, my /etc/resolve.conf is:
nameserver 192.168.1.123 #this is my router

but Ive tried:
nameserver 8.8.8.8 #still doesnt work :-(

----------------------------------------------------------------------

Im beginning to wonder if there is such a thing as DNS gods that I
should have made some prayers and offerings to. Can anyone shine a light
on things?

Yours hopefully,

Yousef



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