Date: Tue, 7 Oct 2008 12:51:13 GMT From: Henri Hennebert <hlh@restart.be> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/127920: pf : ipv6 and synproxy don't play well together Message-ID: <200810071251.m97CpDAu032730@www.freebsd.org> Resent-Message-ID: <200810071300.m97D09UJ098681@freefall.freebsd.org>
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>Number: 127920 >Category: kern >Synopsis: pf : ipv6 and synproxy don't play well together >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: Tue Oct 07 13:00:09 UTC 2008 >Closed-Date: >Last-Modified: >Originator: Henri Hennebert >Release: FreeBSD 7.1-PRERELEASE >Organization: >Environment: FreeBSD morzine.restart.bel 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #0: Sat Oct 4 17:19:46 CEST 2008 root@morzine.restart.bel:/usr/obj/usr/src/sys/MORZINE i386 >Description: My pf.conf: ---begin--- net_if="em0" set block-policy drop set debug misc set loginterface $net_if set state-policy if-bound scrub in all block in log all block out log all set skip on lo0 antispoof quick for $net_if inet pass out quick on $net_if proto { tcp, udp, icmp, icmp6 } all keep state pass in quick on $net_if proto udp from any to ($net_if) port domain pass quick inet proto icmp all icmp-type echoreq keep state pass in quick inet proto icmp all icmp-type unreach code needfrag pass in quick inet6 proto icmp6 all pass in quick on $net_if proto tcp from any to ($net_if) port ssh\ flags S/SA synproxy state (source-track rule, max-src-conn-rate 1/5,\ overload <bad_hosts> flush) pass quick on $net_if proto ipv6 pass quick on $net_if inet6 --- end --- Note the last rule which allow any IPv6 traffic! If I `ssh -4` to this box, the connection succeed. If I `ssh -6` to this box, I get a timeout and the last rule is of no use. If I comment out the rule with synproxy, `ssh -6` succeed - the last rule allow it. If I replace `synproxy state` with `keep state` everything is as expected. Henri >How-To-Repeat: see above. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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