[plug] Strange dns/ip issue

[Julian Clark]

This happens even though I don't have a net connection.
This affects my laptop (Knoppix) install, but not my pc (Gentoo) installation.
My pc will happily know what it's IP adress is, and it knows where the
laptop is.
The laptop seems to forget itself.




On 5/17/05, Carl Gherardi <carl.gherardi at gmail.com> wrote:
> Hey Julian,
> 
> On 5/17/05, Julian Clark <clarkjj at gmail.com> wrote:
> > If I ping a name for resolution, or an ip address, I can then access
> > that address using normal http means. Unfortunately the first ping
> > takes a very long time, and it seems that normal http times out in the
> > time for this to resolve.
> 
> > I'm using dhcp at home, though I'm not sure if the appropriate config
> > files are happy or not (I'm guessing not)
> > resolv.conf has single entry pointing to router's ip address.
> >
> > Using DHCP on a friends network also, I experienced the same issue.
> >
> > Any suggestions?
> 
> This isn't linux specific, but triggers mroe often under linux.
> 
> Dont use the routers dns caching/redirection. I've found this to be
> problematic in all setups i've used previously. I think the problem
> stems from being unable to resolve the domain name of the router
> itself (something to do with preventing dns poisoning?? anyone? )ie.
> Client looks up routers ip for domain name (which the router often
> passes to the real dns server), gets nothing then does the lookup
> anyway. The timeout happens 'cos the first one takes a bit, and is
> then cached.
> 
> If you are using dhcp - set up the router to distribute the adsl
> providers dns servers to any clients and your problems should
> disappear.
> 
> HTH
> 
> Carl G
>