Security for VPNs with IPsec Configuration Guide, Cisco IOS Release 15M&T - L2TP IPsec Support for NAT and PAT Windows Clients [Support] - Cisco
Example for Configuring the Headquarters to Manage Branches (Cisco Routers) Using Efficient VPN and Establishing IPSec Tunnels - AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 CLI-based Typical Configuration Examples -
Example for Establishing an L2TP over IPSec Tunnel for Employees on a Business Trip to Connect to the Headquarters - AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 CLI-based Typical
Why Cisco Routers with SoftEther VPN Server is the Best Solution? - SoftEther VPN Project
cisco - L2TP over IPSEC with a LAN to LAN link - Network Engineering Stack Exchange
Router Cisco RV300 series Dual WAN VPN Firewall anyconnect - Ticaplus
LAC and LNS setup with Cisco as LAC - RouterOS - MikroTik Documentation