really weird(?) DNS setup on linksys router running DD-WRT
Robert P. J. Day
rpjday-L09J2beyid0N/H6P543EQg at public.gmane.org
Mon Sep 21 14:34:23 UTC 2009
On Mon, 21 Sep 2009, Marcelo Cavalcante wrote:
> Why did you put nameserver 127.0.0.1 in the /etc/resolv.conf?
> 127.0.0.1 is the localhost, just loopback. It means, you're trying to use your
> own computer to resolve its names.
> It's wrong. Try to remove it from the /etc/resolv.conf and test it.
> On Mon, Sep 21, 2009 at 11:23 AM, Robert P. J. Day <rpjday-L09J2beyid0N/H6P543EQg at public.gmane.org>
> i figure i might as well bug the tlug list on this one, since the
> location is in TO.
> was helping someone install some linux software this weekend, and
> there seemed to be intermittent network problems (losing ssh login
> sessions), as well as DNS resolvability errors.
> took a look at a couple of the internal linux systems (call them
> 192.168.1.100 and 192.168.1.101), and their /etc/resolv.conf files
> nameserver 127.0.0.1
> nameserver 192.168.1.1 (the router)
> search domain1 domain2
> ok, i thought, they'll try to access the router for DNS info. but
> when i browsed over to the router, it was set up for DNS statically
> with the first two entries:
> am i just confused? that makes no sense to me. the internal
> will consult the router for DNS, while the router turns around and
> consults the internal systems? am i missing something here?
> shouldn't the router be set up to consult 3 *external* DNS servers,
> supplied by whoever their network provider is? or am i just being
i had already noticed that -- that setup is just plain strange. but
am i right in thinking that it's silly to have the linksys router
pointing *inward* for its static DNS servers? surely, if the internal
systems are consulting the router, the router should be consulting
even *further* outside the org to external nameservers. i've never
see a situation where those systems point at each other like that.
Robert P. J. Day Waterloo, Ontario, CANADA
Linux Consulting, Training and Annoying Kernel Pedantry.
Web page: http://crashcourse.ca
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