Issue Description

No acceleration effect for tunnel NAT environment

Handling Process

1. Found out that tunnel NAT is enabled on HQ VPN connection
2. Found out that the branch enabled Pre-Connection
3. Found out that the transfer protocol is High Speed TCP

Root Cause

For Tunnel NAT environment, only HTP-UDP transfer protocol and post-connection method able to accelerate. Other configuration method will not have acceleration effect

Solution

Change the transfer protocol to HTP-UDP and use post connection.
Note: Post-connection is just disable the Preconnection

Suggestion

1. For Tunnel NAT environment, only HTP-UDP transfer protocol and post-connection method able to accelerate. Other configuration method will not have acceleration effect
2. WANO does not support acceleration under firewall NAT environment