
SSTP is only supported on Windows devices. An SSL VPN solution can penetrate firewalls, since most firewalls open TCP port 443 outbound, which SSL uses. Secure Socket Tunneling Protocol (SSTP), a proprietary SSL-based VPN protocol.

OpenVPN can be used to connect from Android, iOS (versions 11.0 and above), Windows, Linux and Mac devices (macOS versions 10.13 and above). OpenVPN® Protocol, an SSL/TLS based VPN protocol. Point-to-site VPN can use one of the following protocols: This article applies to the Resource Manager deployment model and talks about ways to overcome the 128 concurrent connection limit of SSTP by transitioning to OpenVPN protocol or IKEv2. A P2S connection is established by starting it from the client computer. A Point-to-Site (P2S) VPN gateway connection lets you create a secure connection to your virtual network from an individual client computer.
