Hello. I have problem with tcp session close between cisco and freebsd Looks like that it bug in freebsd tcp stack.
CISCO state: sh tcp brief 62935208 CISCO..990 FREEBSD.513 FINWAIT1 FreeBSD state: netstat -an tcp4 57352 0 FREEBSD.513 CISCO.990 ESTABLISHED TCP session from cisco side: IP: s=CISCO (local), d=FREEBSD (FastEthernet0), len 41, sending TCP src=990, dst=513, seq=1411875745, ack=880111139, win=3983 ACK PSH FIN IP: s=FREEBSD (FastEthernet0), d=CISCO (FastEthernet0), len 40, rcvd 3 TCP src=513, dst=990, seq=880111139, ack=1411875745, win=0 ACK IP: s=CISCO (local), d=FREEBSD (FastEthernet0), len 41, sending TCP src=990, dst=513, seq=1411875745, ack=880111139, win=3983 ACK PSH FIN IP: s=FREEBSD (FastEthernet0), d=CISCO (FastEthernet0), len 40, rcvd 3 TCP src=513, dst=990, seq=880111139, ack=1411875745, win=0 ACK .... TCP session from FreeBSD side: 12:16:25.426584 IP CISCO.990 > FREEBSD.login: FP 1411875745:1411875746(1) ack 880111139 win 3714 12:16:25.426675 IP FREEBSD.login > CISCO.990: . ack 1411875745 win 0 12:16:35.121888 IP CISCO.990 > FREEBSD.login: FP 1411875745:1411875746(1) ack 880111139 win 3714 12:16:35.121976 IP FREEBSD.login > CISCO.990: . ack 1411875745 win 0 .... CISCO send ACK on FreeBSD pocket and send FIN. FreeBSD send ACK with seq w/o changes win=0 (!) and ack=cisco_seq.Cisco wait ack=cisco_seq+1 on FIN but FreeBSD box don't send this and cisco retransmit FIN. -- Zherdev Anatoly. _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
