Date: Thu, 12 Aug 2004 12:50:58 +0100 From: Chris Stenton <jacs@gnome.co.uk> To: FreeBSD Current <freebsd-current@freebsd.org> Subject: bad tcp cksum on outgoing packets Message-ID: <1092311458.13121.6.camel@hawk.gnome.co.uk>
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I have just been doing some debugging on my 5.2.1 box and noticed that outgoing tcp packets on the box are coming up with bad checksums on tcpdump. I am using the nge interface. Here is a sample output. 12:44:29.458021 0:4:e2:10:60:83 0:c:6e:4e:a0:cc ip 82: hawk.gnome.co.uk.ssh > kite.gnome.co.uk.2167: P [bad tcp cksum 9420!] 2071:2099(28) ack 753 win 65535 (DF) [tos 0x10] (ttl 64, id 35623, len 68, bad cksum 0!) 12:44:29.642088 0:c:6e:4e:a0:cc 0:4:e2:10:60:83 ip 60: kite.gnome.co.uk.2167 > hawk.gnome.co.uk.ssh: . [tcp sum ok] 753:753(0) ack 2099 win 64956 (DF) (ttl 128, id 44852, len 40) Any ideas whats going on as the packet does not seem to be resent? Chrishome | help
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