MASQ: Getting frequent TCP/UDP checksum errors

MASQ: Getting frequent TCP/UDP checksum errors

Post by Bradley Nelso » Fri, 28 Feb 1997 04:00:00

I am running IP masq on kernel 2.0.18 (RH4.0). My ethernet card is an
NE2000 clone, and I am running on a (gulp) 386/40 with 8MB. I use PPP
thru a 28.8 modem to dial either work or my ISP, then use other PCs on
the ethernet LAN to access remote sites.

Everything works fine, except I get frequent errors in /var/log/messages
reading in part "TCP/UDP checksum error from!". I
presume that this means a packet(s) is getting dropped and resent at
this point. Although I do get the data eventually, it seems as though I
might be wasting time with retransmits.

Any ideas out there? Thanks in advance..

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1. IP MASQ : TCP/UDP checksum errors

Hi all

Ive been using ip mascarading for over a year now, and it has never
given me any troubles at all with 0 maintainance and everything.

But just recently, ive been getting these messages in the dmesg
command output

MASQ: failed TCP/UDP checksum from!
MASQ: failed TCP/UDP checksum from!
MASQ: failed TCP/UDP checksum from!

Its not just these addresses, but lots of others too.

I only started to notice this because i play ultima online a lot, and
i seem to be losing my connection a fair bit (ussually in the middle
of a battle!), which is very frustrating.

Does anyone know what could be causing this error.  I will supply any
more info if it is required.  Im not sure if its to do with my serial
port or not, but here setserial output (for a 56k modem)

/dev/modem, Line 3, UART: 16550A, Port: 0x02e8, IRQ: 3
        Baud_base: 115200, close_delay: 50, divisor: 0
        closing_wait: 3000, closing_wait2: infinte
        Flags: spd_vhi

Please help me, im fed up of alomost dying in UO all the time ! :)

Thanks in advance

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