Date: Wed, 06 Jul 2016 22:11:29 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 210860] [pf] [ip6] Incorrect TCP checksums after rdr Message-ID: <bug-210860-8-biQfo5ts6I@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-210860-8@https.bugs.freebsd.org/bugzilla/> References: <bug-210860-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D210860 --- Comment #2 from Joao Vieira <vieira+fbsd@yubo.be> --- Hello Kristof, Thanks for replying. As you suggested, I tried with the following rules (replacing ::1 with GUA): table <forward_subnets> {2001:16d8:ee03::cafe:d00d/128,!::1} rdr pass log on lo0 inet6 proto tcp to <forward_subnets> -> 2a03:b0c0:1:d0::42e:f001 port 12300 pass out log route-to lo0 inet6 proto tcp to <forward_subnets> keep state but the problem persists. I tried ifconfig lo0 -lro -tso and ifconfig vtnet0 -lro -tso and after that I saw less checksum errors but still saw one on pflog0. Nothing got to the application (nc -l 2a03:b0c0:1:d0::42e:f001 1230= 0). # tcpdump -n -e -ttt -i pflog0 -vvv 00:00:00.000000 rule 0..16777216/0(match): pass out on vtnet0: (flowlabel 0xc4cbb, hlim 64, next-header TCP (6) payload length: 40) 2a03:b0c0:1:d0::42e:f001.39668 > 2001:16d8:ee03::cafe:d00d.80: Flags [S], c= ksum 0x8fdc (incorrect -> 0x78fc), seq 2180195351, win 65535, options [mss 1440,nop,wscale 6,sackOK,TS val 10681721 ecr 0], length 0 00:00:00.000093 rule 0..16777216/0(match): rdr in on lo0: (flowlabel 0xc4cb= b, hlim 64, next-header TCP (6) payload length: 40) 2a03:b0c0:1:d0::42e:f001.3= 9668 > 2a03:b0c0:1:d0::42e:f001.12300: Flags [S], cksum 0x3965 (correct), seq 2180195351, win 65535, options [mss 1440,nop,wscale 6,sackOK,TS val 10681721 ecr 0], length 0 # tcpdump -n -e -ttt -i lo0 -vvv 00:00:00.000000 AF IPv6 (28), length 84: (flowlabel 0xd1846, hlim 64, next-header TCP (6) payload length: 40) 2a03:b0c0:1:d0::42e:f001.59007 > 2001:16d8:ee03::cafe:d00d.80: Flags [S], cksum 0x18ea (correct), seq 927681= 064, win 65535, options [mss 1440,nop,wscale 6,sackOK,TS val 10630808 ecr 0], le= ngth 0 00:00:00.000125 AF IPv6 (28), length 84: (class 0x01, flowlabel 0x3450f, hl= im 64, next-header TCP (6) payload length: 40) 2001:16d8:ee03::cafe:d00d.80 > 2a03:b0c0:1:d0::42e:f001.59007: Flags [S.], cksum 0xb883 (correct), seq 3088270607, ack 927681065, win 65535, options [mss 1440,nop,wscale 6,sackOK= ,TS val 3250889069 ecr 10630808], length 0 00:00:03.022264 AF IPv6 (28), length 84: (class 0x0b, flowlabel 0x3450f, hl= im 64, next-header TCP (6) payload length: 40) 2001:16d8:ee03::cafe:d00d.80 > 2a03:b0c0:1:d0::42e:f001.59007: Flags [S.], cksum 0xb883 (correct), seq 3088270607, ack 927681065, win 65535, options [mss 1440,nop,wscale 6,sackOK= ,TS val 3250889069 ecr 10630808], length 0 00:00:00.000108 AF IPv6 (28), length 64: (hlim 64, next-header TCP (6) payl= oad length: 20) 2a03:b0c0:1:d0::42e:f001.59007 > 2001:16d8:ee03::cafe:d00d.80: Flags [R], cksum 0xb7ee (correct), seq 927681065, win 0, length 0 --=20 You are receiving this mail because: You are the assignee for the bug.=
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