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 From:  Fred Wright <fw at well dot com>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Problems with NAT in pb23r570??
 Date:  Wed, 14 Jan 2004 14:39:32 -0800 (PST)
On Thu, 8 Jan 2004, Chad R. Larson wrote:
> At 01:09 PM 1/8/2004, Michael Iedema wrote:
> >Mine worked flawlessly.
> >I used smartFTP with the following output.  There was a rather long pause 
> >in getting the listing and its presence is noted in the message log.
> 
> That frequently is the result of Domain Name Service (DNS) being 
> misconfigured.  The FTP server does a reverse lookup on the incoming IP 
> address so that it can make a pretty log entry.  Eventually it times out 
> the lookup and continues.  I think the FreeBSD default timeout is 10 
> seconds.  If you see delays connecting to a server that are in multiples of 
> 10 seconds, it is a good bet that the server doesn't have you in its 
> /etc/hosts table =and= doesn't have an accessible name server configured.

That could be, or one can also see that symptom with a server that
attempts to get ident information and has the connection attempt ignored
rather than refused or accepted.  In that case the delay is typically
around 30 seconds (the usual no-response timeout for a TCP initila SYN).

					Fred Wright