What is IPSec VPN PFS Perfect Forward Secrecy – IT Network

Most of time, the remote end tunnel may be configured by a different engineer, so ensure that Phase-1 and Phase-2 configuration should be identical of both side of the tunnel. It would be helpful if we can use a common vpn template and exchange the Phase-1 and Phase-2 SA (security associations) information between both parties before setting up the vpn tunnel. Phase 1 and Phase 2 settings - Fortinet Phase 2. Similar to the Phase 1 process, the two VPN gateways exchange information about the encryption algorithms that they support for Phase 2. You may choose different encryption for Phase 1 and Phase 2. If both gateways have at least one encryption algorithm in common, a VPN tunnel can be established. Keep in mind that more algorithms each IPSEC tunnel Phase 1 and 2 - Cisco Community

IKEv2 Phase 1 (IKE SA) and Phase 2 (Child SA) Message

Indicates there is a mismatch of proposals during phase 1 or phase 2 negotiation between a site-to-site VPN. Received notify: INVALID_ID_INFO. IKE Phase 1 or Phase 2 Settings are mismatched between the SonicWall and the Remote Peer. Received notify: ISAKMP_AUTH_FAILED. IKEv1 Phase 1 and Phase 2 - VMware Phase 2 Parameters. IKE Phase 2 negotiates an IPSec tunnel by creating keying material for the IPSec tunnel to use (either by using the IKE phase 1 keys as a base or by performing a new key exchange). The IKE Phase 2 parameters supported by NSX Edge are: Triple DES, AES-128, AES-256, and AES-GCM [Matches the Phase 1 setting]. SHA1, SHA_256. Configure IPsec/IKE site-to-site VPN connections in Azure

Cisco Meraki products, by default, use a lifetime of 8 hours (28800 seconds) for both IKE phase 1 and IKE phase 2. When there is a mismatch, the most common result is that the VPN stops functioning when one site's lifetime expires.

Jun 18, 2019 Troubleshooting Phase 1 Cisco Site to Site (L2L) VPN