Date: Thu, 02 Jun 2011 00:02:18 +0200 From: "Bartek W. aka Mastier" <mistrzipan@gmail.com> To: freebsd-pf@freebsd.org Subject: PF some packets are falling into block, some are not Message-ID: <4DE6B6EA.3030708@gmail.com>
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I want to just block few classes that must be blocked. It seems like it's partly working , but not all packets are accessible. And moreover I cannot connect from outside. What is wrong? My FreeBSD is 7.3-Stable my wan interface is vlan300 and vlan352 is for an user. The rule for blocking is: Code: rule 28/0 block in log on vlan352 from 79.110.199.192/27 to <mynet> rule 29/0 block in log on vlan352 from 79.110.199.192/27 to !<mynet> I was trying also with: block in log on vlan352 from 79.110.199.192/27 to any instead of these 2 above <mynet> contains adresses of my network: 79.110.192.0/20 I used tags, because, i thought it was be the best way, considering that, that I also have non-public classes that goes through nat. In this case, the simplest one there's a public address. I'm opening the window for allowed ip with proper queuing. Passing rules are: pass quick from 79.110.199.199 to <mynet> keep state pass in quick on vlan352 from 79.110.199.199 to !<mynet> tag FROM79_110_199_199 queue 79_110_199_199D pass out quick on vlan300 tagged FROM79_110_199_199 queue 79_110_199_199U pass in quick on vlan300 from !<mynet> to 79.110.199.199 tag TO79_110_199_199 queue 79_110_199_199U pass out quick on vlan352 tagged TO79_110_199_199 queue 79_110_199_199D 79_110_199_199D is on vlan352 (specifically the physical interface em0) 79_110_199_199U is on vlan300 (em1) queue type is hfsc. But still some packets are dropped tcpdump: WARNING: pflog0: no IPv4 address assigned tcpdump: listening on pflog0, link-type PFLOG (OpenBSD pflog file), capture size 96 bytes rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 54312, offset 0, flags [DF], proto TCP (6), length 1500) 79.110.199.199.55073 > 87.239.219.82.59291: tcp 1480 [bad hdr length 0 - too short, < 20] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 56948, offset 0, flags [DF], proto TCP (6), length 1442) 79.110.199.199.55073 > 80.229.149.80.55511: tcp 1422 [bad hdr length 0 - too short, < 20] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 8242, offset 0, flags [DF], proto TCP (6), length 40) 79.110.199.199.55073 > 85.222.56.47.56705: [|tcp] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 8243, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55073 > 85.222.56.47.56705: [|tcp] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 8244, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55073 > 85.222.56.47.56705: tcp 32 [bad hdr length 0 - too short, < 20] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 8245, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55073 > 85.222.56.47.56705: [|tcp] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 8246, offset 0, flags [DF], proto TCP (6), length 40) 79.110.199.199.55073 > 85.222.56.47.56705: [|tcp] rule 28/0(match): block in on vlan352: (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55022 > 79.110.194.135.43126: [|tcp] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 8247, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55073 > 85.222.56.47.56705: tcp 32 [bad hdr length 0 - too short, < 20] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 54313, offset 0, flags [DF], proto TCP (6), length 40) 79.110.199.199.55073 > 87.239.219.82.59291: [|tcp] rule 28/0(match): block in on vlan352: (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55022 > 79.110.194.135.43126: [|tcp] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 54314, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55073 > 87.239.219.82.59291: [|tcp] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 8248, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55073 > 85.222.56.47.56705: tcp 32 [bad hdr length 0 - too short, < 20] rule 28/0(match): block in on vlan352: (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55022 > 79.110.194.135.43126: [|tcp] rule 29/0(match): block in on vlan352: (tos 0x0, ttl 64, id 54315, offset 0, flags [DF], proto TCP (6), length 52) 79.110.199.199.55073 > 87.239.219.82.59291: [|tcp] From this ip point of view, mostly all Internet connection seems to be working , dns in <my net> pool. This traffic should fall in default queue. But sometimes it stucks. Bandwidth test are showing the right result for upload and download. I cannot connect from my IP class (79.110.194.135) to this one (79.110.199.199). I haven't checked how it looks when someone announces connection from outside ( !<mynet> ).
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