Date: Wed, 23 Jan 2013 13:10:33 GMT From: Vladimir Spiridenkov <vs@gtn.ru> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/175530: lost dynamic IPFW rule for TCP session after 5 min inactivity Message-ID: <201301231310.r0NDAXFb062129@red.freebsd.org> Resent-Message-ID: <201301231320.r0NDK0rR038298@freefall.freebsd.org>
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>Number: 175530
>Category: kern
>Synopsis: lost dynamic IPFW rule for TCP session after 5 min inactivity
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jan 23 13:20:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Vladimir Spiridenkov
>Release: 9.1-STABLE
>Organization:
ITR
>Environment:
FreeBSD vswork.itreg.ru 9.1-STABLE FreeBSD 9.1-STABLE #0 r245462M: Wed Jan 23 15:39:15 MSK 2013 vs@vswork.itreg.ru:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
there is no keepalive packets for TCP session during live time of dynamic IPFW rule
>How-To-Repeat:
root@vs# ssh 10.255.255.60
root@vs# ipfw -d show|grep -e 10.255.255.60
10200 32 7002 (299s) STATE tcp 10.10.10.44 46787 <-> 10.255.255.60 22
root@vs# sleep 275
root@vs# ipfw -d show|grep -e 10.255.255.60
10200 32 7002 (24s) STATE tcp 10.10.10.44 46787 <-> 10.255.255.60 22
root@vs# sleep 30
root@vs# ipfw -d show|grep -e 10.255.255.60
root@vs#
>Fix:
--- /usr/src/sys/netpfil/ipfw/ip_fw_dynamic.c-PREV 2013-01-15 21:03:16.000000000 +0400
+++ /usr/src/sys/netpfil/ipfw/ip_fw_dynamic.c 2013-01-23 15:27:23.356498876 +0400
@@ -1322,7 +1322,7 @@
V_dyn_keepalive_interval = 20;
V_dyn_keepalive_period = 5;
V_dyn_keepalive = 1; /* do send keepalives */
- V_dyn_keepalive = time_uptime;
+ V_dyn_keepalive_last = time_uptime;
V_dyn_max = 4096; /* max # of dynamic rules */
>Release-Note:
>Audit-Trail:
>Unformatted:
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