The required and suggested algorithms in the original Internet Key Exchange version 1 (IKEv1) specification do not reflect the current reality of the IPsec market requirements. The original specification allows weak security and suggests algorithms that are thinly implemented. This document updates RFC 2409@ the original specification@ and is intended for all IKEv1 implementations deployed today.
RFC 4109-2005 history
2005RFC 4109-2005 Algorithms for Internet Key Exchange version 1 (IKEv1)