TCP stack errors
Jose Hidalgo Herrera
jose at hostarica.com
Mon Jan 31 08:30:10 PST 2005
I have a 4.10p5
(cvsuped with RELENG_4_10 last friday)
that shows things like this with a netstat -sf inet:
3630 discarded for bad checksums
85 discarded for bad header offset fields
1220093 bad connection attempts
137097 embryonic connections dropped
7 with bad checksum
the complete netstat can be found in:
One can assume that the server is that target for some stupid guy,
BUT the thing is that IS the server the one SENDING the miscalculated
I saw that with sshd connections, smtps, auths, etc.., the client sent
the handshake but the server was replying with wrong packages.
It occurs with different window-sizes, different flags, the network card
is an em:
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
media: Ethernet autoselect (100baseTX <full-duplex>)
with two ip addresses in the same subnet (alias with /32 netmask)
no hardware failures reported.
It sends bad packages from both addresses.
Is there any bug I'm not aware of with this driver ?
Jose Hidalgo Herrera <jose at hostarica.com>
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