Talk:VPN
- ESP = Port less Protocol Like ICMP. Session = SPI => Divided into 2 parts to get Src/Dst Ports
- VPN = 5th & 6th packets - PSK is used to generate Session Key
- IKE ID is used in Dailup Mode to Validate Peer
- NAT-T = PAT Device - IP + Port no will uniquely identify Peer
- IKEv2 has 4 Packets - Initiator request, Responder response, Ike auth, Ike resp