Ethereal-users: Re: [Ethereal-users] TCP Checksum Incorrect.

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From: Jeff Morriss <jeff.morriss@xxxxxxxxxxx>
Date: Fri, 29 Jul 2005 08:15:23 -0400


Salvador Ruiz García wrote:

Hi,
I have problems with Ethereal and the TCP Checksum. In TCP packets from my PC (128.127.50.15 in the capture file) indicates "TCP CHECKSUM INCORRECT". I think there is a problem with Ethereal because both computers are comunicating well. Packets arriving my PC are correct. In "Preferences -> Protocols -> TCP" the option "Check the Validity of the TCP checksum when posible" is checked. My computers run Windows XP. I use Ethereal 0.10.12 but I had the same problems with older versions (Not in Ethereal 0.10.5) Running with WinPcap version 3.1 beta4 (packet.dll version 3, 1, 0, 24), based on libpcap version 0.8.3 on Windows XP Service Pack 2, build 2600. 

See:

http://www.ethereal.com/faq.html#q5.14