[ubuntu-uk] DNS settings resetting

James Tait james.tait at wyrddreams.org
Fri Jan 15 23:25:23 GMT 2010


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Colin Law wrote:
>>> I have looked for clues as to why the DNS settings might be
>>> disappearing but have not found anything logged anywhere, suggestions
>>> as to where to look for information would be much appreciated.  Or any
>>> other ideas for that matter.

DHCP transactions or normally logged by dhclient in /var/log/syslog.
You should be able to grep for dhclient and see what IP address you've
been offered and by what server.  Also, NetworkManager logs the DHCP
information it gets in the same file.

> I suppose one possibility is that when the PC asks for the lease to be
> renewed the router is not providing the DNS correctly.  That seems an
> odd sort of fault however.  It has only recently started happening.

It sounds a bit like you may be getting a lease from a different server
on your network.  Has anything recently been added to the network that
could be acting as a DHCP server?  A new computer, router, access point?

Cheers,

JT
- --
- ---------------------------------------+--------------------------------
James Tait, BSc                        |    xmpp:jayteeuk at wyrddreams.org
Programmer and Free Software advocate  |       VoIP: +44 (0)870 490 2407
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