Re: tcp hostcache and ip fastforward for review

From: Jonathan Mini <mini_at_freebsd.org>
Date: Sun, 9 Nov 2003 12:59:57 -0800
On Nov 9, 2003, at 8:19 AM, Andre Oppermann wrote:

>   - DoS attack 2: make MSS very low on local side of connection
>     and send maaaany small packet to remote host. For every packet
>     (eg. 2 bytes payload) a sowakeup is done to the listening
>     process. Consumes a lot of CPU there.
>

This sounds as if it might be worthwhile to add a delay to
the TF_NODELAY case for receive processing as well.

-- 
Jonathan Mini
mini_at_freebsd.org
http://www.freebsd.org
Received on Sun Nov 09 2003 - 11:59:57 UTC

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