RELENG_7: can't connect to Solaris


I can't connect from FreeBSD 7 box to Solaris 9. While between FreeBSD6 and Solaris 9 tcp work fine.

I run on FreeBSD, and it nod't work:
$ fetch -o /dev/null http://mail6:8274 fetch: transfer timed out

OS versions:
FreeBSD citrin.rambler.stack.net 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #0: Fri Oct 19 00:31:03 MSD 2007 citrin@xxxxxxxxxxxxxxxxxxxxxxxx:/usr/obj/usr/src/sys/GENERIC amd64
SunOS mail6 5.9 Generic_117172-07 i86pc i386 i86pc

tcpdump on freebsd side:
04:26:28.332895 81.19.65.162.57161 > 81.19.71.6.8274: S [bad tcp cksum 3038!] 3123015513:3123015513(0) win 65535 <mss 1460,nop,wscale 8,sackOK,timestamp 498561841 0> (DF) (ttl 64, id 27368, len 60, bad cksum 0!)
04:26:28.333213 81.19.71.6.8274 > 81.19.65.162.57161: S [tcp sum ok] 2890615179:2890615179(0) ack 3123015514 win 33304 <nop,nop,timestamp 622594948 498561841,mss 1460,nop,wscale 1,nop,nop,sackOK> (DF) (ttl 62, id 16035, len 64)
04:26:28.333290 81.19.65.162.57161 > 81.19.71.6.8274: . [bad tcp cksum 793f!] ack 1 win 260 <nop,nop,timestamp 498561841 622594948> (DF) (ttl 64, id 27369, len 52, bad cksum 0!)
04:26:28.334892 81.19.65.162.57161 > 81.19.71.6.8274: P [bad tcp cksum 572f!] 1:88(87) ack 1 win 260 <nop,nop,timestamp 498561843 622594948> (DF) (ttl 64, id 27370, len 139, bad cksum 0!)
04:26:28.335148 81.19.71.6.8274 > 81.19.65.162.57161: . [tcp sum ok] ack 88 win 33260 <nop,nop,timestamp 622594948 498561843> (DF) (ttl 62, id 16036, len 52)

snoop in Solaris show same:
1 0.00000 81.19.65.162 -> 81.19.71.6 TCP D=8274 S=57161 Syn Seq=3123015513 Len=0 Win=65535 Options=<mss 1460,nop,wscale 8,sackOK,tstamp 498561841 0>
2 0.00001 81.19.71.6 -> 81.19.65.162 TCP D=57161 S=8274 Syn Ack=3123015514 Seq=2890615179 Len=0 Win=33304 Options=<nop,nop,tstamp 622594948 498561841,mss 1460,nop,wscale 1,nop,nop,sackOK>
3 0.00028 81.19.65.162 -> 81.19.71.6 TCP D=8274 S=57161 Ack=2890615180 Seq=3123015514 Len=0 Win=260 Options=<nop,nop,tstamp 498561841 622594948>
4 0.00162 81.19.65.162 -> 81.19.71.6 TCP D=8274 S=57161 Push Ack=2890615180 Seq=3123015514 Len=87 Win=260 Options=<nop,nop,tstamp 498561843 622594948>
5 0.00003 81.19.71.6 -> 81.19.65.162 TCP D=57161 S=8274 Ack=3123015601 Seq=2890615180 Len=0 Win=33260 Options=<nop,nop,tstamp 622594948 498561843>


With net.inet.tcp.rfc1323=0 tcp work, but it should work with rfc1323=1 (and in FreeBSD 6 tcp to SunOS work with rfc1323=1).

net.inet.tcp.log_debug=1 and nothing about this connection logged.

--
WBR,
Anton Yuzhaninov
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