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SubjectRe: TCPv4 bad checksum - weren't they gone?
On 8 Jul 1998 peloy@ven.ra.rockwell.com wrote:


# I've just got this:
#
# TCPv4 bad checksum from 130.151.17.154:1f90 to 130.151.17.162:0406,
# len=1206/1206/1226
#
# I thought these were gone...

Oh my no ....

07/07/1998 11:13:22 madi kernel [debug]: TCPv4 bad checksum from
141.15.3.1:b641 to 206.4.67.5:0050, len=20/20/40
07/07/1998 13:11:53 madi kernel [debug]: TCPv4 bad checksum from
130.75.176.39:042e to 206.4.67.5:0015, len=20/20/40
07/07/1998 22:10:29 madi kernel [debug]: TCPv4 bad checksum from
152.166.188.162:09a0 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:45:53 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0419 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:45:53 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0419 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:45:53 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0419 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:45:54 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0419 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:45:55 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0419 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:46:26 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041c to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:46:27 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041c to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:46:33 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041f to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:46:33 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041f to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:05 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041f to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:06 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041f to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:06 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041f to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:06 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:041f to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:17 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0422 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:17 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0422 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:17 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0422 to 206.4.67.5:0050, len=20/20/40
07/07/1998 23:47:18 madi kernel [debug]: TCPv4 bad checksum from
153.36.172.120:0422 to 206.4.67.5:0050, len=20/20/40

(ad naseum ...)

I'm getting around 250 of them a day, from various sources. No modems
involved here ....

They _appear_ to be harmless, so I've just been ignoring them :)

-----------------------------------------------------------------------------
Nicholas J. Leon "Elegance Through Simplicity"
nicholas@binary9.net - - http://mrnick.binary9.net

8 4 9 1 7 3 <-- what is the pattern?


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