Re: telnet localhost slow, telnet 127.0.0.1 ok
Shyamal Prasad <shyamal.prasad@sbcglobal.net> wrote:
> "Rupert" == RUPERT LEVENE <levene@unix.lancs.ac.uk> writes:
> Rupert> Shyamal Prasad <shyamal.prasad@sbcglobal.net> wrote:
> >> "Rupert" == RUPERT LEVENE <levene@unix.lancs.ac.uk> writes:
> Rupert> Antony Gelberg <antony@antgel.co.uk> wrote:
> >> >> On Sat, Aug 16, 2003 at 12:25:16AM +0100,
> >> >> r.levene@lancaster.ac.uk wrote:
> >> Running strace telnet localhost 22 shows that it's trying
> >> to resolve the hostname localhost by querying the
> >> nameserver. I thought that shouldn't happen with my setup,
> >> though.
> The mystery deepens since I looked at your configs and compared with
> mine, and they are the same. The thing is, uh, when I run strace I see
> the same thing happen. I can see a query going to my local name
> server.
> I've never noticed this because (a) I don't use telnet and (b) my
> nameserver responds quickly enough that I don't notice any wierd
> delay.
> Now I'm really interested in the solution for your problem. Sorry I
> can't give you a solution ;-)
> Incidentally, ssh does not do this odd lookup and works exactly how
> I'd have expected telnet to.
Indeed. Netcat and galeon appear to do the right thing too, while
telnet, lynx and links all suffer from a delay. (I first noticed the
problem using lynx). My guess at the moment is that the combination of
a slow machine and a slow nameserver is exposing an odd bug in these
programs. Although I would be surprised if this were the case since
telnet and lynx have such a long pedigree...
Rupert
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