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anti-replay protection without IKE



If IKE isn't being used, should IPSEC hosts allow replay protection?  RFC 2401 
hints that replay checking shouldn't be done for manual SAs, presumably on the 
theory that manual keys are likely to be long-lived.  However, there are 
applications that use a different key management protocol because (for various 
reasons) IKE is inappropriate.  Simply as a matter of convenience, such 
applications may use the manual keying interface, especially if only one key 
management daemon can exist on a system.  Should (or SHOULD) implementations 
permit such applications to request replay checking?

		--Steve Bellovin




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