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From
SubjectRe: MASQ: failed TCP/UDP checksum
Date
On Sat, 28 Jun 1997 14:13:07 -0500, 
frostbyte <fb@chibacity.com> wrote:
>sorry about the silly question but what does the following kernel
>message mean?
>
>gollumII kernel: MASQ: failed TCP/UDP checksum from 207.226.80.1.58!

A packet got corrupted between the source (207.226.80.1) and your masq
box. One or two are normal, line noise, dodgy network cards etc. If
you get a lot it could be a problem with your PPP link. Some users
have reported problems with PPP compression options (especially VJ
header compression) where there is a mismatch between Linux and your
provider's terminal server. Disabling compression often helps. You
could run pppstats and check the error count, too high a value
indicates a line or protocol problem.



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