Re: Syn flooding attacks

[Peter Evans]

Phil Howard <phil@charon.milepost.com> wrote: 

	[about SYN flooding]

|I don't know of any routers that have these or other means of dealing with
|the SYN attacks.

	If you search cco for "tcp intercept", you should find
	something interesting. This feature was available in
	11.2(4)F.  ((paraphrased from memory))

	Basically the router completed the handshaking then passed
	on the completed connection to the inside host.

	When under attack, it halves the timeouts (progressively?)
	for half-open connections.

	I don't know what happened to the F branch. It seems to have
	been left behind.


	Peter
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