OSEC

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Subject: Re: kernel: IP_MASQ:reverse ICMP: failed checksum from xxx.xxx.xxx.xxx!
From: Rod Longhofer (rodLONGHOFER.COM)
Date: Fri Oct 20 2000 - 22:12:04 CDT

I have had some of the same, what I believe, is it may be somebody trying to
exploit a possible IP_Masq bug. Im NOT sure. I searched and did not find
anything either.

Rod

----- Original Message -----
From: "Roel Schroeven" <Roel.SchroevenSOLIDSTATE.BE>
To: <FOCUS-LINUXSECURITYFOCUS.COM>
Sent: Thursday, October 19, 2000 9:05 PM
Subject: kernel: IP_MASQ:reverse ICMP: failed checksum from xxx.xxx.xxx.xxx!

kernel: IP_MASQ:reverse ICMP: failed checksum from xxx.xxx.xxx.xxx!

I keep seeing these messages in the firewall logs. I've searched on the
Internet, but it seems nobody really knows what it means. Does anybody know
if it's a security problem?

Thnx,
Roel Schroeven