This is an article about a VPN protocol. For more information about available protocols, please refer to this article: https://support.nordvpn.com/hc/en-us/articles/206931809-Choosing-between-VPN-protocols
Secure Socket Tunneling Protocol (SSTP) is a form of VPN tunnel with features that allow traffic to pass through firewalls that block L2TP/IPsec and PPTP traffic. SSTP provides a technology to encapsulate PPP traffic over the SSL channel of the HTTPS protocol. The use of Point to Point Protocol allows support for powerful authentication methods such as EAP-TLS. The use of HTTPS means that traffic will flow through TCP port 443, a port which is commonly used for Web access. Secure Sockets Layer (SSL) provides transport-level security with enhanced key encryption, negotiation and integrity checking.