Re: [IPsec] Comments on draft-ietf-ipsecme-failure-detection-00

2010-09-08 Thread Tero Kivinen
Yaron Sheffer writes: > >> Alternatively it would simplify things immensely if we mandate that SPIs > >> be random for implementations that support QCD (possibly only on the > >> gateway side). Can we do it without having to "update RFC 4306"? > > > > I think it's enough to require this of the toke

Re: [IPsec] Comments on draft-ietf-ipsecme-failure-detection-00

2010-09-05 Thread Yaron Sheffer
Hi Yoav, I'm OK with discussing these issues later, now that they're on the Tracker. Except for one - see below. On 09/05/2010 09:31 PM, Yoav Nir wrote: On Sep 5, 2010, at 11:03 AM, Yaron Sheffer wrote: [snip] - 5.1: this method is indeed problemmatic if SPIi/SPIr pairs are repeated wi

Re: [IPsec] Comments on draft-ietf-ipsecme-failure-detection-00

2010-09-05 Thread Yoav Nir
On Sep 5, 2010, at 11:03 AM, Yaron Sheffer wrote: > In general, the draft is in good shape. But IMO, we have one major > security issue left: the dependence on SPI values which potentially come > from a small space, i.e. may be repeated in normal operation, or may be > coerced into repeating.