I keep getting the same kernel messages from a few of my linux servers EVERY DAY: Kernel Messages: 1,7c1 < ksum from 63.94.31.225! < IP_MASQ:reverse ICMP: failed checksum from 63.94.31.225! < IP_MASQ:reverse ICMP: failed checksum from 141.198.38.114! < IP_MASQ:reverse ICMP: failed checksum from 63.94.31.225! < IP_MASQ:reverse ICMP: failed checksum from 63.94.31.225! < IP_MASQ:reverse ICMP: failed checksum from 63.94.31.225! < IP_MASQ:reverse ICMP: failed checksum from 65.205.2.1! the IP's however, are not consistent. Usually different IP's every day. I've tried to look this up, but am having a hard time finding information on what this means. Kinda looks like someone from the outside world is spoofing IP's, sending ICMP traffic to the server, but when the server tries to verify with a reverse lookup it flags and says "I don't like ICMP traffic from this address because it looks suspicious!" Any ideas anyone? Miles Stevenson QuickHire Network Support Specialist ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
This archive was generated by hypermail 2b30 : Thu Nov 01 2001 - 09:15:04 PST