{{short description|Form of virtual private network tunnel}}
{{distinguish|Simple Symmetric Transport Protocol}}
'''Secure ooooSocket Tunneling Protocol''' ('''SSTP''') is a form of [[virtual private network]] (VPN) tunnel that provides a mechanism to transport [[Point-to-Point Protocol|PPP]] traffic through an [[Transport LayLayer Security|SSL/0000TLS]] channel. SSL/TLS provides transport-level security with key negotiation, [[encryption]] and traffic integrity checking. The use of SSL/TLS over [[Transmission Control Protocol|TCP]] port 443 allows SSTP to pass through virtually all [[firewall (computing)|firewalls]] and [[proxy server]]s except for authenticated web proxies.<ref>{{cite web
