PPP --- TCP bad checksums

Peter Broadbery (pab@obscurity.demon.co.uk)
Sun, 9 Aug 1998 14:22:47 +0100


Hi,

I've noticed that I'm getting a lot of TCP bad checksums when
connecting to the net via PPP. These started when I upgraded to
2.1.108 from 2.1.99. I'm running 2.1.115 at the moment, with the same
problem. Is this a known problem, or is there any way of tracking
this down further, preferably without putting excess strain on my
'phone bill?

I'm using pppd-2.3.5, modem is a PNP internal modem (Supra SUP1650,
apparently). System is tweaked RH5.1.

Thanks,
Peter.

Aug 9 09:40:04 obscurity kernel: TCPv4 bad checksum from 199.165.129.193:0050 to 212.228.98.182:0447, len=1480/1480/1500
Aug 9 09:40:38 obscurity kernel: TCPv4 bad checksum from 158.152.254.72:0077 to 212.228.98.182:0400, len=1466/1466/1486
Aug 9 09:40:38 obscurity kernel: TCPv4 bad checksum from 158.152.254.72:0077 to 212.228.98.182:0400, len=1076/1076/1096
Aug 9 09:40:40 obscurity kernel: TCPv4 bad checksum from 158.152.254.72:0077 to 212.228.98.182:0400, len=1480/1480/1500
Aug 9 09:40:41 obscurity kernel: TCPv4 bad checksum from 158.152.254.72:0077 to 212.228.98.182:0400, len=1410/1410/1430
Aug 9 09:40:41 obscurity kernel: TCPv4 bad checksum from 158.152.254.72:0077 to 212.228.98.182:0400, len=1420/1420/1440
Aug 9 09:40:41 obscurity kernel: TCPv4 bad checksum from 158.152.254.72:0077 to 212.228.98.182:0400, len=1093/1093/1113

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