Date: Sat, 22 Feb 2014 22:13:06 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Nicolas DEFFAYET <nicolas-ml@deffayet.com> Cc: FreeBSD Net <freebsd-net@freebsd.org>, "Andrey V. Elsukov" <bu7cher@yandex.ru> Subject: Re: IPsec filtertunnel broken on FreeBSD 10 Message-ID: <CAJ-VmomHdstgnBDvg6Zisxn3xchTmPoUTf9PmEkY1HTs288yAw@mail.gmail.com> In-Reply-To: <1393109280.11968.3.camel@fr-wks3.corp.novso.com> References: <1391725273.22934.16.camel@fr-wks3.corp.novso.com> <1392417340.10711.5.camel@fr-wks3.corp.novso.com> <52FEA4F5.5010702@yandex.ru> <52FEA5A2.3050106@yandex.ru> <1392641917.21759.1.camel@srv31.corp.novso.com> <53020F0F.9050809@yandex.ru> <1392648453.22762.2.camel@srv31.corp.novso.com> <5304DA80.6010403@yandex.ru> <1393109280.11968.3.camel@fr-wks3.corp.novso.com>
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Hi, Please make sure you file a PR and loop andre@freebsd.org into it too. thanks, -a On 22 February 2014 14:48, Nicolas DEFFAYET <nicolas-ml@deffayet.com> wrote: > On Wed, 2014-02-19 at 20:23 +0400, Andrey V. Elsukov wrote: > Hello, > > After very long testing, i have discovered the route cause. > Testing is not easy as there is a dependency between kernel and > userland, it's not like on a Linux where the kernel is not depend of > userland. > Broken userland can generate false-positive result. > > The revision 254519 break the firewall with IPsec. > http://svnweb.freebsd.org/base?view=revision&revision=254519 > > "Move the global M_SKIP_FIREWALL mbuf flags to a protocol layer specific > flag instead. The flag is only used within the IP and IPv6 layer 3 > protocols. > > Because some firewall packages treat IPv4 and IPv6 packets the same the > flag should have the same value for both." > > It seem that some code doesn't have been updated for allow firewall to > work with IPsec. > > > FreeBSD 10.0-CURRENT #0 r254518 (10-userland) > ------------------------------- > # ipfw -a list > 00010 6 326 allow log logamount 10000 tcp from 192.168.0.1 to > 192.168.0.2 dst-port 22 via re0 in > 00020 0 0 allow log logamount 10000 tcp from 192.168.0.2 to > 192.168.0.1 dst-port 22 via re0 out > 65535 5149 411660 allow ip from any to any > => ipfw counters are ok for inbound > > Feb 22 22:16:44 host2 kernel: ipfw: 10 Accept TCP 192.168.0.1:51691 > 192.168.0.2:22 in via re0 > => ipfw see the connection > > 22:18:16.127112 IP 192.168.0.1 > 224.0.0.5: OSPFv2, Hello, length 44 > 22:18:21.042325 IP 192.168.0.1 > 192.168.0.2: > ESP(spi=0x00003039,seq=0xc15a), length 92 > 22:18:21.042548 IP 192.168.0.2 > 192.168.0.1: > ESP(spi=0x00003039,seq=0x6), length 92 > 22:18:21.042785 IP 192.168.0.1 > 192.168.0.2: > ESP(spi=0x00003039,seq=0xc15b), length 84 > 22:18:21.074818 IP 192.168.0.2 > 192.168.0.1: > ESP(spi=0x00003039,seq=0x7), length 116 > 22:18:21.174651 IP 192.168.0.1 > 192.168.0.2: > ESP(spi=0x00003039,seq=0xc15c), length 84 > => traffic is encrypted by IPsec > > > FreeBSD 10.0-CURRENT #0 r254519 (10-userland) > ------------------------------- > # ipfw -a list > 00010 0 0 allow log logamount 10000 tcp from 192.168.0.1 to > 192.168.0.2 dst-port 22 via re0 in > 00020 0 0 allow log logamount 10000 tcp from 192.168.0.2 to > 192.168.0.1 dst-port 22 via re0 out > 65535 3132 249778 allow ip from any to any > => ipfw counters are not increased! > > nothing in log > => ipfw DO NOT see the connection! > > 22:22:05.890386 IP 192.168.0.1 > 192.168.0.2: > ESP(spi=0x00003039,seq=0xc165), length 92 > 22:22:05.890565 IP 192.168.0.2 > 192.168.0.1: > ESP(spi=0x00003039,seq=0x6), length 92 > 22:22:05.890793 IP 192.168.0.1 > 192.168.0.2: > ESP(spi=0x00003039,seq=0xc166), length 84 > 22:22:05.922544 IP 192.168.0.2 > 192.168.0.1: > ESP(spi=0x00003039,seq=0x7), length 116 > 22:22:06.022056 IP 192.168.0.1 > 192.168.0.2: > ESP(spi=0x00003039,seq=0xc167), length 84 > => traffic is encrypted by IPsec > > > Many thanks > > -- > Nicolas DEFFAYET > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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