What VPN protocol do you use?

We use OpenConnect with TLS/SSL. We carefully selected this protocol and built upon it to mask all connections as standard HTTPS traffic (much like when you use an online checkout), which results in a service that is much harder to identify as VPN traffic, or block it at the firewall level. This means it simply works everywhere. No need to switch between complicated protocols and additional layers of security. NodeVPN just works, everywhere!