If Wireshark complains about incorrect cheecksums…


You most probably have TCP checksum offloading enabled in your NIC. You can disable it, just know that enabling/disabling it will probable reset your network stack (so don’t do it on remote system).

PS. This is not always the case, I’ve seen the same error message on systems which didn’t have TCP checksum offloading (and no, the NIC wasn’t bad, I’ve tested it using a bootable CD).


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