[Cialug] slow route

[Cory Meyer]

Who's answering DNS PTR requests for your SSH client's IP?
ie:  ssh from 192.168.2.2 --> 172.27.1.1?

SSH-Server# dig ns 168.192.in-addr.arpa.
168.192.in-addr.arpa.   83195   IN      NS      blackhole-1.iana.org.
168.192.in-addr.arpa.   83195   IN      NS      blackhole-2.iana.org.

I noticed today that lookups against the two above are timing out.  I'm
assuming that the 2 NS servers will return NULL if they ever do respond.

http://www.iana.org/faqs/abuse-faq.htm#FAQonBlackholeServers

 -- Cory

On 8/27/07, Kevin C. Smith <kevin at linuxsmith.com> wrote:
>
> Well, here's the odd part. Anything outside works fine, inside is slow.
> Those inside are listed in my /etc/hosts files, so no DNS is needed.
> Thus, my confusion.
>
> # route
> takes 20 seconds to complete
> # route -n
> is instant
>
>
> > Does route -n work faster?  Typically, when I've had issues such as
> > these, it's DNS related.  I'll usually cheat and add host entries in /
> > etc/hosts for the hosts involved (in both the local and remote
> > server) and it's all better :)
> >
> > I've noticed this problem in particular on my "FreeBSD box with its
> > Aqua interface" when connecting to a network with no DNS / connectivity.
> >
> > -Tom
> >
> >
> >
> > On Aug 27, 2007, at 2:38 PM, Kevin C. Smith wrote:
> >
> >> Any ideas why route would slow down? It all worked fine Friday.
> >>
> >> # route
> >> Takes forever.
> >> # ssh some_local_server
> >> Takes forever.
> >> # ssh some_external_server
> >> Works as expected.
> >>
> >>
> >> --
> >> Kevin C. Smith
> >>
> >> _______________________________________________
> >> Cialug mailing list
> >> Cialug at cialug.org
> >> http://cialug.org/mailman/listinfo/cialug
> >
> > _______________________________________________
> > Cialug mailing list
> > Cialug at cialug.org
> > http://cialug.org/mailman/listinfo/cialug
> >
> >
> >
>
>
> --
> Kevin C. Smith
>
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>
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