Are you capturing on a third machine or in one of the machines involved?
If you are capturing in one of the machines diurectly involved you
might be getting wrong checksums because their calculation is
offloaded to the network card and so they are calculated in their way
out after they been passed to the capture mecanism.
See http://www.ethereal.com/faq.html#q5.14
On 11/3/05, Butler, Leonard <ButlerLI@xxxxxx> wrote:
>
>
>
> I keep getting a unidirectional error;
>
>
>
> Checksum: 0x98c5 [incorrect, should be 0x80a5]
>
>
>
> in a bi-directional stream between a firewall and web security box.
>
> The error is coming from the Windows server (Dell 2850 w 4 GB NICs) to a
> Linux firewall. Both are plugged into the same Cisco switch.
>
> The connectivity seems to be fine other than the checksum errors.
>
> Any idea where I should start looking to remedy?
>
>
>
> Thanks,
>
>
>
> Len
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