Date: Wed, 26 Oct 2005 13:06:29 +0400 From: dawnshade <dawnshade@mail.ru> To: freebsd-stable@freebsd.org, anton@nikiforov.ru Subject: Re: pf and short packets Message-ID: <200510261306.29888.dawnshade@mail.ru> In-Reply-To: <435F4135.9000405@nikiforov.ru> References: <435E85AB.3070701@nikiforov.ru> <200510261220.32300.dawnshade@mail.ru> <435F4135.9000405@nikiforov.ru>
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On Wednesday 26 October 2005 12:41, Anton Nikiforov wrote: > dawnshade wrote: > > On Wednesday 26 October 2005 12:08, Anton Nikiforov wrote: > >> On Tuesday 25 October 2005 23:21, Anton Nikiforov wrote: > >>>>tcpdump -n -e -ttt -x -i pflog0 host 127.0.0.1 > >>>>000034 rule 0/3(short): pass out on lo0: IP 127.0.0.1.514 > > >>>>127.0.0.1.643: . ack 30 win 65535 > >>>> 0x0000: 4600 002c 6605 4000 0306 11c5 7f00 0001 > >>>> F..,f.@......... 0x0010: 7f00 0001 0100 0000 0202 0283 8129 5dab > >>>> .............)]. 0x0020: 5db7 f2f2 5010 ffff 7dce 0000 > >>>> ]...P...}... 000034 rule 0/3(short): pass out on lo0: IP 127.0.0.1.514 > >>>> > >>>>127.0.0.1.643: . ack 30 win 65535 > >>>> 0x0000: 4600 002c d21d 4000 0306 a5ac 7f00 0001 > >>>> F..,..@......... 0x0010: 7f00 0001 0100 0000 0202 0283 8129 5dab > >>>> .............)]. 0x0020: 5db7 f2f2 5010 ffff 7dce 0000 > >>>> ]...P...}... > >>>> > >>>>The rule for this packet is not a "log" one, but the sign (short) is > >>>>what i cannot understand. > >>> > >>>Read 'man 1 tcpdump' about key "-s". > >>>You command must be like "tcpdump -s 1000 -n -e -ttt -x -i pflog0 host > >>>127.0.0.1" > >>> > >>>Change value 1000 to appropriate. > >> > >>Hi, and thanks for the replay, > >>but my question is not about how to use tcpdump (i know -s key), but > >>what to do with pf to make this packets pass through. > >>When my pf is up i cannot rsh to ipcad, but when it is down - everything > >>is working just fine. > >>I need this rsh to get my ip statistics. > > > > sorry, i misunderstand you. > > can you provide output 'pfctl -sr -g' (at leat sensitive rules before > > number 34) > > Hello and thanks again for the replay. > Here is the output of pfctl -sr -g. > @0 scrub in all fragment reassemble > [ Skip steps: i=end f=end p=end sa=end sp=end da=end dp=end ] > [ queue: qname= qid=0 pqname= pqid=0 ] > @1 scrub out all random-id fragment reassemble > [ Skip steps: i=end d=end f=end p=end sa=end sp=end da=end dp=end ] > [ queue: qname= qid=0 pqname= pqid=0 ] > @0 pass quick on lo0 all > [ Skip steps: p=4 sp=802 da=2 dp=17 ] > [ queue: qname= qid=0 pqname= pqid=0 ] > I was "playing" with this rule and used to install it in different ways > and places. I have no idea what to do with this. > I was turning off scrubbing, everything beloew. With no result. > > All the rest is not about lo0, but here they are (34 out of 9849): > > @1 block drop in quick inet from 192.168.11.1 to any > @2 block drop in log quick on fxp0 inet from any to 224.0.0.0/3 > @3 block drop out log quick on fxp0 inet from 224.0.0.0/3 to any > @4 block drop in log quick on fxp0 inet proto tcp all flags FPU/FPU > @5 block drop in log quick on fxp0 inet proto tcp all flags FS/FSRA > @6 block drop in log quick on fxp0 inet proto tcp all flags /FSRA > @7 block drop in log on fxp0 proto tcp all > @8 block drop in log on fxp0 proto udp all > @9 block drop out log on fxp0 proto tcp all > @10 block drop out log on fxp0 proto udp all > @11 block drop in log on fxp0 proto icmp all > @12 block drop out log on fxp0 proto icmp all > @13 block return-rst in log on fxp0 proto tcp all > @14 block return-rst out log on fxp0 proto tcp all > @15 block return-icmp(port-unr, port-unr) in log on fxp0 proto udp all > @16 block return-icmp(port-unr, port-unr) out log on fxp0 proto udp all > @17 block drop in log on fxp0 proto tcp from any to any port = pop3 > @18 block drop in log on fxp0 proto tcp from any to any port = loc-srv > @19 block drop in log on fxp0 proto tcp from any to any port = profile > @20 block drop in log on fxp0 proto tcp from any to any port = netbios-ns > @21 block drop in log on fxp0 proto tcp from any to any port = netbios-dgm > @22 block drop in log on fxp0 proto tcp from any to any port = netbios-ssn > @23 block drop in log on fxp0 proto tcp from any to any port = microsoft-ds > @24 block drop in log on fxp0 proto udp from any to any port = pop3 > @25 block drop in log on fxp0 proto udp from any to any port = loc-srv > @26 block drop in log on fxp0 proto udp from any to any port = profile > @27 block drop in log on fxp0 proto udp from any to any port = netbios-ns > @28 block drop in log on fxp0 proto udp from any to any port = netbios-dgm > @29 block drop in log on fxp0 proto udp from any to any port = netbios-ssn > @30 block drop in log on fxp0 proto udp from any to any port = microsoft-ds > @31 block drop out log on fxp0 proto tcp from any to any port = pop3 > @32 block drop out log on fxp0 proto tcp from any to any port = loc-srv > @33 block drop out log on fxp0 proto tcp from any to any port = profile > @34 block drop out log on fxp0 proto tcp from any to any port = netbios-ns > > Just in case: > # pfctl -sr -g | grep lo0 > @0 pass quick on lo0 all maybe this link help you.: http://groups.google.com/group/fido7.ru.unix.bsd/msg/187bf3d7de6e3eab?dmode=source Sorry to other subscribers - it in russian. short fix problem: replace 'pass quick all lo0' to 'pass qucik all allow-opts lo0'
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