WAN Optimization via IPsec

WAN Optimization can work with IPSEC as long as the traffic is optimized before it enters the ipsec tunnel. Optimization before encryption is the minimum requirement to get optimization working over the ipsec VPN. Example: PC > Firewall > Wanos > Modem > Internet < Modem < Wanos < Firewal < PC

Some Cisco devices drops proto 108 over IPsec GRE tunnels. The workaround is to use a different Encapsulation (E.G. GRE only on Cisco VPN) or enable udpencap on Wanos.

To enable UDP Encapsulation, log in to Wanos appliance Configure > System Settings > Optimization Settings > Encapsulation (udp)

Although very rarely an issue, note that tunnels could introduce additional MTU considerations.