Re: [IPsec] Replay Protection

2010-02-01 Thread Steven Bellovin
On Feb 1, 2010, at 7:45 PM, Venkatesh Sriram wrote: > Hi, > > Most IETF documents state that replay protection is not provided with > manual keying. I wanted to understand the reason for the same. Is it > because with manual keying there is no way to negotiate the sequence > numbers and thus pro

Re: [IPsec] Replay Protection

2010-02-01 Thread Venkatesh Sriram
> > Programming interfaces to the SADB (like PF_KEY) or manual-keying programs > (like setkey(8) on BSD or ipseckey(1M) on OpenSolaris) might be able to allow > a manually-keyed SA with replay protection, but without the above operational > restrictions, things would break down quickly.  This is wh

Re: [IPsec] Replay Protection

2010-02-01 Thread Dan McDonald
On Tue, Feb 02, 2010 at 06:15:40AM +0530, Venkatesh Sriram wrote: > Hi, > > Most IETF documents state that replay protection is not provided with > manual keying. I wanted to understand the reason for the same. Is it > because with manual keying there is no way to negotiate the sequence > numbers