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ASA Sending RST Packets - Random Disconnects

rraver
Level 1
Level 1

We have had an ASA put in place and we see random disconnects when going through a VPN tunnel. From packet captures it seems that the sender will send a packet that has a bad TCP checksum and then the ASA will respond automatically with a TCP RST. Is this a normal behavoir, any ideas on troubleshooting or possible changes?

1 Reply 1

vkapoor5
Level 5
Level 5

By default it will pass incorrect checksums for UDP and TCP. You can configure the PIX to drop TCP packets with bad TCP checksums with the "checksum-verification" under the tcp-map.

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