North American Network Operators Group|
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Re: router syn/syn-ack/ack alarming...
> um... maybe i'm missing the clue here, but if the router vendors add > something that shuts down an interface if the SYN/SYN-ACK/ACK ratio > becomes too bad make it *easier* for me if i'm doing a denial of service > attack on a host? On "core" (whatever that means) you only need an extra couple of hundred SYNs /sec to be passing through an attack, on many many 000s of SYNs per sec. On customer facing routers, much easier just to block packets with source addresses not on customer LANs. IE where your solution would help, one can already fix the problem w/o a s/w change. Alex Bligh Xara Networks - - - - - - - - - - - - - - - - -