Date: Tue, 13 Aug 2024 09:28:18 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 269770] libalias udp redirect_port temporary translation failure Message-ID: <bug-269770-227-uxzR8bv4zJ@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-269770-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269770 Peter Much <pmc@citylink.dinoex.sub.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |donner@FreeBSD.org --- Comment #6 from Peter Much <pmc@citylink.dinoex.sub.org> --- Hunting it down - the problem is a race condition: libalias has an internal representation of a flow (called a "temporary link"). These can expire and get deleted - the logic when and how this happens is unintellegible, but there is a time gap between expiry and deletion. When another packet arrives from outside during this time gap - which is unlikely in TCP, but likely with UDP (like syslog sending another message after some pause, or VPN restarting after reboot) - libalias finds the old "temporary link", detects that it is already expired, and deletes it - but does then not anymore check for a configured portforward for this flow. So the newly installed "temporary link" is without portforwarding, and will continue to exist until perchance traffic ceases and it might get expired. -- You are receiving this mail because: You are the assignee for the bug.home | help
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