The DH group you choose for Phase 2 does not need to match the group you choose for Phase 1. When you specify PFS during Phase 2, a Diffie-Hellman exchange occurs each time a new SA is negotiated. If a key is compromised, new session keys are still secure. PFS makes keys more secure because new keys are not made from previous keys. ![]() You specify the Diffie-Hellman group in Phase 2 only when you select Perfect Forward Secrecy (PFS). Phase 2 configuration includes settings for a security association (SA), or how data packets are secured when they are passed between two endpoints. In addition to Phase 1, you can also specify the Diffie-Hellman group to use in Phase 2 of an IPSec connection. ![]() DH groups and Perfect Forward Secrecy (PFS) This is where the two peers make a secure, authenticated channel they can use to communicate. When you define a manual BOVPN tunnel, you specify the Diffie-Hellman group as part of Phase creation of an IPSec connection. ![]() DH Group 20: 384-bit elliptic curve groupīoth peers in a VPN exchange must use the same DH group, which is negotiated during Phase 1 of the IPSec negotiation process.DH Group 19: 256-bit elliptic curve group.Higher group numbers are more secure, but require additional time to compute the key.įireware supports these Diffie-Hellman groups: Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process.
0 Comments
Leave a Reply. |