Date: Thu, 22 Mar 2001 16:19:12 +0200 From: ostap <ostap@ukrpost.net> To: freebsd-security@freebsd.org Subject: DoS attack - advice needed Message-ID: <3ABA09E0.141711C9@ukrpost.net>
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It looks as I had an icmp DoS attack recently on my freebsd 3.3-release server. the box was totally frozen and another machine plugged into the same switch (freebsd 4.1) showed a lot of 'icmp bandwidth limit' messages, the switch showed about 80% load ( against 10% normal), and all computers connected to it were totally blocked out. this was done from internal network (this server is a gateway), and i don't have any filter rules/blocks for outgoing traffic. i'm interested in the ways how this can be done, and what is needeed to prevent such attacks on 3.x freebsd, without blocking all icmp traffic. thanks in advance To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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