The following reply was made to PR kern/37174; it has been noted by GNATS.

From: Pavel Cahyna <pavel@NetBSD.org>
To: gnats-bugs@NetBSD.org
Cc: kern-bug-people@NetBSD.org, gnats-admin@NetBSD.org,
	netbsd-bugs@NetBSD.org
Subject: Re: kern/37174: ipfilter doesn't properly remove connections from NAT table
Date: Mon, 22 Oct 2007 23:14:42 +0200

 > Install NetBSD 4.0_RC3 onto a machine which does NAT for a modest sized 
 > network. ipnat -l | wc will show a constantly growing list of connections. 
 > Networks which would normally only average around 1,000 connections show 
 > more than 25,000 connections in a day or two. Networks which average 
 > around 50 connections show more than 20,000 after four or five days.
 
 Probably caused by http://releng.netbsd.org/cgi-bin/req-4.cgi?show=880
 which will be backed out soon.