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      TCP/IP Checksum Calculator

Hex Data (e.g from tcpdump)

Working

HEC =

Hint: If you are calculating the TCP or UDP checksum, don't forget the peseudo header (see rfc768 and rfc793).

Also see the IP Header checksum calculator


Back to the Top       last modified: Wed Oct 29 18:25:42 NZDT 2003       Comments, questions, and suggestions are welcome:   Feedback .
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