From owner-freebsd-questions  Tue Jun 19 14: 2:23 2001
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Date: Tue, 19 Jun 2001 21:59:23 +0100
From: Richard Smith <rdls@rdls.net>
To: Dan Armstrong <dan@beanfield.com>
Cc: freebsd-questions@freebsd.org
Subject: Re: Urgent help with Reverse Lookups and FTPD
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References: <3B2F74D7.C057B32F@beanfield.com>
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In-Reply-To: <3B2F74D7.C057B32F@beanfield.com>; from dan@beanfield.com on Tue, Jun 19, 2001 at 11:50:47AM -0400
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On Tue, Jun 19, 2001 at 11:50:47AM -0400, Dan Armstrong wrote:
> We are a small ISP, and just turned up a new webserver running Free4.3
> 
> Most of our customers live on private (192.168) addresses and I am
> getting slaughtered with phone calls that they cannot ftp into their
> sites, and it is because their ftp programs don't necessarily wait for
> Free's ftpd to timeout doing the reverse lookup, for an address that of
> course does not have any reverse information for it.  If I add their
> IP to the /etc/hosts BOOM they get in instantly.  These thousands of
> addresses are all dynamically assigned, so the hosts file fix is not
> possible on this scale.  Is there a way I can get it to stop? HELP!

Just a random thought, if you made your name server authoritative for
the zone "168.192.IN-ADDR.ARPA", it would fail the reverse lookup
immediately.

Rich.


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