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[ILUG] [OT] Cisco router ip question

[ILUG] [OT] Cisco router ip question

Colin Whittaker grimnar at redbrick.dcu.ie
Thu Feb 24 12:35:33 GMT 2000


Ronan Kirby stated the following on Thu, Feb 24, 2000 at 11:49:32AM +0000 :
> > Anyone out there know how to do this? or even if its possible, I want to do
> > this to stop spoofed ip packets from leaving my router destined for the
> > net...
> 
> You can stop spoofed packets leaving your network by applying "Reverse
> Path Filtering" on the router.  As far as I know all versions of IOS
> support it.  T'will stop smurf attacks etc. from your network.  Any
> packets with faked source IPs will just be dropped.

ip unicast reverse verify

inst it, i think,

great thing to have on any edge router
-- 

May a Misguided Platypus lay its Eggs in your Jockey Shorts





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