[ubuntu-uk] DNS settings resetting
clanlaw at googlemail.com
Fri Jan 15 12:18:43 UTC 2010
2010/1/15 Dave Morley <davmor2 at davmor2.co.uk>:
> On Fri, 2010-01-15 at 11:38 +0000, Colin Law wrote:
>> 2010/1/15 Dave Morley <davmor2 at davmor2.co.uk>:
>> > On Fri, 2010-01-15 at 11:19 +0000, Colin Law wrote:
>> >> I am using Ubuntu 9.10 wired to a Linksys modem/router using DHCP to
>> >> get IP etc. All works fine normally and if I right click on the
>> >> connection icon in the top panel and select Connection Information I
>> >> see my IP address etc as expected, including Primary and Secondary DNS
>> >> servers as provided by my ISP.
>> >> Occasionally, however, once a day or so, the DNS values get set to
>> >> 192.168.1.1 (the router ip) and dns fails of course. If I unplug my
>> >> ethernet cable for a few seconds and plug it back in then it picks up
>> >> the dns again and all is well.
> Okay two things you can try.
> 1: find the reset button on the router, factory reset it then set it
> backup (this can be annoying)
I am somewhat loathe to do that, I think there is always some risk in
an operation like that. I would prefer to convince myself that it is
worthwhile before trying this. It seems a rather odd sort of fault in
the router just sometimes providing the wrong data but working
correctly the rest of the time.
Are DHCP requests logged anywhere on the PC?
I wonder what would be the result if the renew request failed
completely, would the PC possibly keep its IP address but reset the
DNS? Again it would be useful if I could get DHCP requests logged
> 2: Right click n-m applet and select edit connections, highlight the
> connection you wish to edit, go to ipv4 settings tab select auto (dhcp)
> address only and drop the ip address of your dns server into the dns
I see that this should solve the problem, but I would prefer to
understand what is going on and fix the root cause of the problem if
possible. Not that I am not grateful for the suggestion however. A
disadvantage of this is that I occasionally connect the laptop to a
router in a different locality, and the DNS settings would be
Thanks again for the suggestions
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