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From: grog@lemis.de (Greg Lehey)
Organisation: LEMIS, Schellnhausen 2, 36325 Feldatal, Germany
Phone: +49-6637-919123
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Subject: Re: Telnet delays out of 2.1.5
To: nc@ai.net (Network Coordinator)
Date: Wed, 11 Sep 1996 07:02:53 +0200 (MET DST)
Cc: questions@FreeBSD.org (FreeBSD Questions)
In-Reply-To: <Pine.BSF.3.91.960910195946.10969A-100000@alyssa.ai.net> from "Network Coordinator" at Sep 10, 96 08:03:02 pm
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Network Coordinator writes:
>
>
> We have installed 2.1.5 on two internal machines. One is a Pentium 150
> and one is a PentiumPro 200mhz. The first has 128MB of RAM and the other
> 512MB. Telneting into each box provides excellent performance, but
> whenever an FTP or telnet connection is attempted from either box, a long
> delay ensues.
>
> Trying 1.1.1.1
> Connected
> Hit ^] etc..
>
> At this point it waits approximately 20-2minutes seconds.
>
> Then everything works fine. The receiving systems are not loaded at all,
> so connections, etc should be fine. This happens between all other
> machines including other 2.1.5 machines. None of our other BSD boxes are
> doing this, and the receiving machines that are local are not even doing
> reverse DNS lookups on these incoming requests.
>
> Any ideas or something I have overlooked?

This is almost certainly a DNS problem.  Try running tcpdump while
somebody establishes a connection, and see what it's looking for.

Greg