Date: Fri, 12 Sep 2003 12:36:26 -0400 From: Chuck Swiger <cswiger@mac.com> To: Douglas Carmichael <dcarmich@mail.ourservers.net> Cc: freebsd-questions@freebsd.org Subject: Re: Long-running connections stop working through a FreeBSD 5.1R firewall/NAT box... Message-ID: <3F61F60A.1010903@mac.com> In-Reply-To: <00A25C47.FAD60D53.8@mail.ourservers.net> References: <00A25C47.FAD60D53.8@mail.ourservers.net>
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Douglas Carmichael wrote: > HTTP connections across the firewall work fine (ie. web browsing) and I can > maintain a connection to a streaming radio station just fine from my > PowerBook inside the firewall, but AIM, ICQ, and Yahoo Messenger seem to > stay up for a while and then just unexpectedly disconnect (the client > has to reconnect). What could be the problem? You're using NAT. NAT implementations have a finite number of dynamic rules available and/or time out old connections, thus dropping long-running persistent connections. (That behavior isn't desirable, but is "normal" for NAT....) -- -Chuck
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