What ports does VPN use ? :: SG FAQ

Choose the Port and Protocol for Mobile VPN with SSL Mobile VPN with IPSec uses specific ports and protocols that are blocked by some public Internet connections. By default, Mobile VPN with SSL operates on the port and protocol used for encrypted website traffic (HTTPS) to avoid being blocked. This is one of the main advantages of SSL VPN over other Mobile VPN options. Can I use another port other than 443 for HTTPS/SSL Ports from 1024 on are freely useable. As an example, you could use port 30443 for SSL VPN if your VPN gateway supports port reassignment and the SSL VPN client (if any) does this as well. If you access SSL VPN via web portal you can add the custom port number in the URL like this: "https://mysslvpnserver.com:30443". Virtual private network - Wikipedia A virtual private network (VPN) extends a private network across a public network and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. Applications running across a VPN may therefore benefit from the functionality, security, and management of the private network.

SSTP (Secure Socket Tunneling Protocol) VPN, a.k.a. SSL VPN - uses private key to encrypt data over a SSL connection port 443 TCP Note: may also use ports …

List of TCP and UDP port numbers - Wikipedia The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well-known ports. TCP and UDP Ports used for the Cisco VPN Client VPN In most situations, there is a PAT device between the VPN client and the head end VPN device. PAT works by differentiating users by the UDP or TCP port used. Since IPSec uses IP protocol 50, it is impossible for more than one user to connect to the VPN device, through the PAT.

How To Guide: Set Up & Configure OpenVPN client/server VPN

VPN tunnel: What is it and how does it work? | NortonLifeLock