Date: Tue, 07 Aug 2007 14:43:48 +0200 From: "nicolas.cornu" <nicolas.cornu@ch-st-julien.fr> To: Gilberto Villani Brito <linux@giboia.org>, freebsd-pf@freebsd.org Subject: Re: PF and proxytunnel Message-ID: <46B86904.4080900@ch-st-julien.fr> In-Reply-To: <6e6841490708061110y1be829dbwf17424beb588492e@mail.gmail.com> References: <46B2DB78.7090001@ch-st-julien.fr> <6e6841490708061110y1be829dbwf17424beb588492e@mail.gmail.com>
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Gilberto Villani Brito wrote: > On 03/08/07, nicolas.cornu <nicolas.cornu@ch-st-julien.fr> wrote: > >> Hi, >> >> >> I'm quite new in the PF experience. I'm trying to set a rule which can >> permit me to log on my home machine from work by using ssh and >> proxytunnel (http://proxytunnel.sourceforge.net/) >> >> I can't make it work. Each time the firewall is up, my ssh connection is >> broken. I think it's a flag problem but I can't make it work. >> >> >> So, this is my rule (And I'm blocking everuthing by default) : >> >> " pass in quick log on $ext_if proto tcp from <work> to $ext_if port 443 >> flags S/SA keep state " >> >> The thing is in a forum, a guy asked me to try with the flag S/SA but it >> doesn't work. i tried some other fags without any succes. >> >> I also got a log of the packets which are blocked : >> >> >> >> >> 16:10:12.437424 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 0:112(112) ack 1 win >> 32844 <nop,nop,timestamp 1876831905 597750028> >> 16:10:12.437433 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 1:112(111) ack 1 win >> 32844 <nop,nop,timestamp 1876831905 597750028> >> 16:10:12.497175 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: . ack 4294967056 win >> 32767 <nop,nop,timestamp 597750123 1876831872> >> 16:10:12.506673 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: . ack 4294967104 win >> 32767 <nop,nop,timestamp 597750133 1876831886> >> 16:10:12.516765 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: . ack 4294967200 win >> 32767 <nop,nop,timestamp 597750143 1876831896> >> 16:10:12.524137 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: . ack 0 win 32767 >> <nop,nop,timestamp 597750150 1876831901> >> 16:10:12.698154 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876832166 5 >> 97750028> >> 16:10:12.879724 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597750505 1876831901> >> 16:10:13.086087 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876832554 5 >> 97750028> >> 16:10:13.174156 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597750799 1876831901> >> 16:10:13.661987 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876833130 5 >> 97750028> >> 16:10:13.761762 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597751387 1876831901> >> 16:10:14.613849 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876834082 5 >> 97750028> >> 16:10:14.937784 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597752563 1876831901> >> 16:10:16.317606 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876835786 5 >> 97750028> >> 16:10:17.289307 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597754915 1876831901> >> 16:10:17.381429 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876836850 5 >> 97750028> >> 16:10:19.309147 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876838778 5 >> 97750028> >> 16:10:21.992459 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597759619 1876831901> >> 16:10:22.964584 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876842434 5 >> 97750028> >> 16:10:29.280630 rule 0/0(match): block in on tun0: >> [work_ip_address].58926 > [home_ip_address].443: S >> 3840383586:3840383586(0) win 5840 <mss 1440,sackOK,timestamp 59776690 >> 8 0,nop,wscale 0> >> 16:10:30.075509 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876849546 5 >> 97750028> >> 16:10:31.399531 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597769027 1876831901> >> 16:10:32.279624 rule 0/0(match): block in on tun0: >> [work_ip_address].58926 > [home_ip_address].443: S >> 3840383586:3840383586(0) win 5840 <mss 1440,sackOK,timestamp 59776990 >> 8 0,nop,wscale 0> >> 16:10:38.278752 rule 0/0(match): block in on tun0: >> [work_ip_address].58926 > [home_ip_address].443: S >> 3840383586:3840383586(0) win 5840 <mss 1440,sackOK,timestamp 59777590 >> 8 0,nop,wscale 0> >> 16:10:44.097373 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876863570 5 >> 97750028> >> 16:10:50.211598 rule 0/0(match): block in on tun0: >> [work_ip_address].58797 > [home_ip_address].443: P 1:49(48) ack 0 win >> 32767 <nop,nop,timestamp 597787843 1876831901> >> 16:10:50.277124 rule 0/0(match): block in on tun0: >> [work_ip_address].58926 > [home_ip_address].443: S >> 3840383586:3840383586(0) win 5840 <mss 1440,sackOK,timestamp 59778790 >> 8 0,nop,wscale 0> >> 16:10:51.796096 rule 0/0(match): block in on tun0: >> [work_ip_address].58951 > [home_ip_address].443: S >> 3848980265:3848980265(0) win 5840 <mss 1440,sackOK,timestamp 59778942 >> 6 0,nop,wscale 0> >> 16:10:54.795329 rule 0/0(match): block in on tun0: >> [work_ip_address].58951 > [home_ip_address].443: S >> 3848980265:3848980265(0) win 5840 <mss 1440,sackOK,timestamp 59779242 >> 6 0,nop,wscale 0> >> 16:10:58.119242 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58797: FP 4294967008:112(400) >> ack 1 win 32844 <nop,nop,timestamp 1876877594 5 >> 97750028> >> 16:14:05.064569 rule 0/0(match): block out on tun0: >> [home_ip_address].443 > [work_ip_address].58951: P >> 939245923:939246035(112) ack 3848991638 win 32844 <nop,nop,timestamp >> 1877064567 597982693> >> >> >> >> >> >> >> >> >> I hope someone can help me. >> >> >> >> Regards, >> >> Nicolas >> >> >> _______________________________________________ >> freebsd-pf@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-pf >> To unsubscribe, send any mail to "freebsd-pf-unsubscribe@freebsd.org" >> >> > > I think you have a rule like: > block out $ext_if all > > Try add other rule like: > pass out quick log on $ext_if proto tcp from $ext_if port 443 to > <work> flags S/SA keep state > > > thank you. It actually worked but I replaced the port from 443 to >1024. I thought the "keep state" could permit me to use one rule instead of two... Nicolas.
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