Ubiquity EdgeRouter Lite Site-to-Site / VPN Connection to Symantec Web Security

I am attempting to create a vpn connection from my EdgeRouter Lite to Symantec's Web Security service and I've been told that it should work but it isn't tested. I have tried a number of things but there really aren't any good resources or walk through to get the two connected. Does anyone have any good resources or some kind of documentation that may be helpful? Thank you!