Adam wrote:
> Why is it that it took so long to get the telnet login prompt? When I do
> "telnet HostX" I got:
>
> Trying 10.1.64.69...
> Connected to HostX.
> Escape character is '^]'.
>
> ... but it stops there for some 5 minutes before I could get the following:
>
> Red Hat Linux release 5.0 (Hurricane)
> Kernel 2.0.32 on an i486
> login:
This looks like it could be a reverse DNS lookup (although they
usually only take 155 seconds to time out, it's conceivable that both
tcpd *and* telnetd are performing reverse lookups, which would double
the delay to 310 seconds, or about 5 minutes).
> Please correct me if I'm wrong:
>
> At first I thought the telnet server was doing some name lookup. So, since
> it's within the LAN, I simply put the host name of client machines into the
> server's /etc/hosts. To certain circumstances it does solve the problem (or
> is it not?).
>
> However, there are times when it doesn't. So I thought it must have been
> partly due to the problem with the link and routing. If it is so, can
> anyone of you elaborate it?
For a definitive answer, use strace on the tcpd/telnetd process, to
discover what it's actually waiting for.
--
Glynn Clements <[EMAIL PROTECTED]>
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