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Routers and resolv.conf: [was: extremely slow to ssh out from my machine]



Following on from...

On Sun, 2005-02-27 at 20:51 +0000, michael wrote:
> On Sun, 2005-02-27 at 20:45 +0000, michael wrote:
> > On Sun, 2005-02-27 at 21:32 +0100, Jan C. Nordholz wrote:
> 
> Jan & co
> > > 
> > > Hm, your resolv.conf mentions the host 192.168.0.1 as primary
> > > DNS server... this is giving problems later on... are you sure
> > > that there's a DNS server running (and responding) there?
> > 
> > 192.168.0.1 is the IP of my router/modem...
> > Here's what the resolv.conf looks like
> > search
> > nameserver 192.168.0.1
> > nameserver 212.1.130.32
> > 
> > 
> > 
> > {snip}
> > 
> > > I'd suggest checking the DNS server on 192.168.0.1, or at least
> > > temporarily swapping the order in /etc/resolv.conf, so the one
> > > that's most likely to respond is listed first.
> > > 
> > 
> > I've just tried that and restarted sshd but that hasn't helped (does it
> > required a full reboot or something else like resolver or named?)
> > 
> aha - checking what the DNS IP is from my router and putting that as the
> first nameserver makes it works much faster!
> 

Upon reboot I noticed that the /etc/resolv.conf is rebuilt. Looking at
the router (a D-Link) config again I see it has entries
 Configuration -> ProxyDNS   212.85.249.130 
 Configuration -> DHCP configuration on LAN  Primary DNS=192.168.0.1
 Configuration -> DHCP configuration on LAN  Secondary DNS=212.1.130.32
which lead to a /etc/resolv.conf of
  $ cat /etc/resolv.conf
  search
  nameserver 192.168.0.1
  nameserver 212.1.130.32

giving the probs for ssh as before. Could some kind soul clarify to me
the diffs between the 3 entries in the router config and why the
proxyDNS doesn't appear in the resolv.conf?

Thanks, Michael





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