Oct 22, 2009

Configuring IPsec Virtual Private Networks Jul 02, 2020 Configuring IPSec VPN on Cisco IOS - TechRepublic Oct 26, 2006

Feb 22, 2018

This article seems to be the reference for IPsec Site-to-Site (route-based) VPN between FortiGate and Cisco Router. This helped me greatly to get a VPN tunnel up between my 2 devices (Fortigate 60C and Cisco 881W). I can ping from the Fortigate LAN to the Cisco LAN however I cannot ping from the Cisco … IPSec can be used to protect one or more data flows between a pair of hosts, between a pair of security Cisco 7200 series routers, or between a security Cisco 7200 series router and a host. IKE is a hybrid security protocol that implements Oakley and SKEME key exchanges inside the Internet Security Association and Key Management Protocol

As I mentioned back when this thread started, the only reasons I have ever seen cited for adopting IKEv2-based IPsec remote access VPN is because there is some legal or regulatory requirement that mandates the organization must do so.

Configure Site to Site IPSec VPN Tunnel in Cisco IOS Router Oct 08, 2015 Security for VPNs with IPsec Configuration Guide, Cisco Sep 02, 2018