conf/56031: ipfw hangs on every invocation

Robert Watson rwatson at
Tue Sep 2 09:20:23 PDT 2003

The following reply was made to PR conf/56031; it has been noted by GNATS.

From: Robert Watson <rwatson at>
To: "James F.  Hranicky" <jfh at>
Cc: FreeBSD-gnats-submit at, admin at,
	freebsd-bugs at
Subject: Re: conf/56031: ipfw hangs on every invocation
Date: Tue, 2 Sep 2003 12:10:28 -0400 (EDT)

 On Tue, 2 Sep 2003, James F.  Hranicky wrote:
 > Let me know if I can provide any more info. 
 This seems to suggest it's really just the userland application spinning,
 not a hang in the kernel.  Could you try using truss to see if, once it
 starts spinning, it's making system calls, or just stuck entirely in
 Assuming it's purely a userspace problem (perhaps triggered by
 syntactically poor output from the kernel), the next thing to do is
 probably to instrument your ipfw binary with either printfs or debugging
 symbols and see where in its execution it is spinning.  Could you include
 a list of your IPFW rules also, please?  I wonder if the kernel or
 userland tool contains a bug that is causing it to misbehave for some
 specific ruleset.
 Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
 robert at      Network Associates Laboratories

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