https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6556
--- Comment #6 from Scott Borisch <sborisch@xxxxxxxxxxxxxxx> 2011-11-15 09:44:12 PST ---
Hello,
I went back to try to reproduce the behavior and I am now seeing our device IS
incorrectly changing the TCP checksum in the fragmented IP packet.
Although I have a pcap showing a case where this did not appear to happen, I
can no longer reproduce it. At this point I think the problem may be on our
side. I will fix the bug in our device so that it does not change the TCP
checksum in fragmented IP packets and then see if this fixes the issue I
thought I was seeing in wireshark. I'll let you know if I still think I see an
issue in with Wireshark after fixing this bug. Thanks.
As for fragmenting packets that have the don't fragment bit set, yes, this is
test equipment, and it has an option to ignore the don't fragment flag.
- Scott
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