From owner-freebsd-questions  Wed Feb  7  9:48:26 2001
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Date: Wed, 07 Feb 2001 12:43:40 -0500
From: Bill Moran <wmoran@mail.iowna.com>
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To: Derek Bottles <derek@rchco.com>
Cc: questions@FreeBSD.ORG
Subject: Re: Slow mail services
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Derek Bottles wrote:
> 
> FreeBSD pop.rchco.com 3.4-RELEASE FreeBSD 3.4-RELEASE #0: Mon Dec 20
> 06:54:39 GMT 1999     jkh@time.cdrom.com:/usr/src/sys/compile/GENERIC  i386
> 
> I am having an issue where the system is very slow to respond to network
> requests on port 25, 110 and 23.
> 
> It is an interment issue and the service always works if the calling client
> does not time out before the response is sent. I am running ipop3d on port
> 110 and Sendmail on 25. Telnetd on 23.
> 
> I looked into DNS response as in the past I have had some issues there, but
> it seems to be working well and very fast at this time, however my internal
> network clients do not have entries in DNS.
> 
> I have the response problem with any client, Outlook, Eudora, or a Telnet
> client calling on the port 25 or 110 ports. Once the connection is up it is
> very fast.

Do you get the same speed connection from the localhost?
Do you get the same speed when connecting to the IP vs. connecting to
the hostname?

If either of those answers no, look at your DNS as the likely problem.
Usually slow connects are the result of a security-minded daemon trying
to resolve a DNS name for someone that's connecting so it can log it. If
the DNS is set wrong, it can take a while to finally give up.

-Bill


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