This message has been showing up in /var/log/security:
Aug 6 01:56:44 sara /kernel: drop session, too many entries
Aug 6 16:40:05 sara /kernel: drop session, too many entries
Aug 7 13:25:23 sara /kernel: drop session, too many entries
Aug 7 15:32:00 sara /kernel: drop session, too many entries
Aug 7 15:32:03 sara last message repeated 3 times
Aug 8 22:30:53 sara /kernel: drop session, too many entries
Aug 10 19:47:31 sara /kernel: drop session, too many entries
Aug 11 11:11:46 sara /kernel: drop session, too many entries
Aug 11 13:08:15 sara /kernel: drop session, too many entries
Aug 11 13:10:26 sara last message repeated 12 times
Aug 11 13:20:34 sara last message repeated 55 times
Aug 11 13:30:00 sara last message repeated 66 times
Aug 11 16:49:26 sara /kernel: drop session, too many entries
Aug 11 16:49:58 sara last message repeated 5 times
Aug 11 16:52:04 sara last message repeated 20 times
Aug 11 17:02:01 sara last message repeated 93 times
Aug 11 17:18:01 sara /kernel: drop session, too many entries
Aug 11 17:23:03 sara /kernel: drop session, too many entries
I'm running FreeBSD 4.10 with IPFW and NAT as a gateway/router/firewall for a home
LAN. I am the only user (I hope!) with access to this system.
I googled the "drop session" message and found e-mail correspondence indicating this
message is a result of having too many telnet or ssh sessions open at the same time
and could be an indication of a DOS attack.
I have disabled telnet in inetd.conf. I am running ftp with anonymous log-in disabled
and ssh with root login disabled. I am also running apache 1.3.
Is this message something I should investigate further, or is it like the script
kiddies who scan my ports every night - just something to live with?
TIA for any enlightenment/suggestions anyone can provide.
Jim
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