Date: Wed, 19 Jul 2017 14:02:38 +0200 From: "Muenz, Michael" <m.muenz@spam-fetish.org> To: freebsd-net@freebsd.org Subject: Re: NAT before IPSEC - reply packets stuck at enc0 Message-ID: <2d607e1a-a2c0-0f85-1530-c478962a76cd@spam-fetish.org> In-Reply-To: <911903d1-f353-d5d6-d400-d86150f88136@yandex.ru> References: <459d59f7-2895-8aed-d547-be46a0fbb918@spam-fetish.org> <a082662c-145e-0132-18ef-083adaa59c33@yandex.ru> <1c0de616-91ff-a6f9-d946-f098bc1a709f@spam-fetish.org> <911903d1-f353-d5d6-d400-d86150f88136@yandex.ru>
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Am 19.07.2017 um 12:12 schrieb Andrey V. Elsukov: > > Try to add the following rule: > > ipfw add 179 nat 1 log all from 10.24.66.0/24 to 10.26.1.1 in recv enc0 > > This rule will pass a decrypted packet to the NAT instance, that will > check in the states table should a packet be translated back or not. > > You need to have enc0 interface in UP state and sysctl variable > net.enc.in.ipsec_filter_mask should be set to 1 or 2. > > After translation on the enc0 a packet will be returned to the IPsec > subsystem, that will queue it for further processing in the netisr. > Since destination address become foreign, it will be forwarded by IP stack. > Hi, I tried this but still no luck. Packets get seen by ipfw -ta list: 00179 139 3892 Wed Jul 19 14:00:21 2017 nat 1 log ip from 10.26.2.0/24 to 10.24.66.0/24 00179 143 4228 Wed Jul 19 14:00:21 2017 nat 2 log ip from 10.24.66.0/24 to 10.26.1.1 in recv enc0 65535 5891 1716730 Wed Jul 19 14:00:21 2017 allow ip from any to any But there's nothing on the internal IF. Also played around with filter_mask and also one_pass. Also tried (as you see above) with a second nat instance where reverse is disabled. Do you have any other clue? Really appreciate your help, thanks! Michael
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