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Fred Baker
fred at cisco.com
Mon Jun 15 20:44:41 UTC 2009
On Jun 15, 2009, at 1:16 PM, Quinn Mahoney wrote:
> Or use this script which null routes the traffic (I guess it's not a
> big deal getting the syn packets, as long as the mail won't send
> because of the null route)
I you are using uRPF, the SYN packets won't get through either,
because they came from an interface other than the null interface. Not
so helpful interddomain, but it protects your customers from each
other (as BCP 38 does in other cases).
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