Which network port is primarily used for SSL/TLS VPN connections?

The network port that is primarily used for SSL/TLS VPN connections is port 443. This port is typically associated with HTTPS, which secures HTTP traffic using SSL (Secure Sockets Layer) or TLS (Transport Layer Security). When users connect to a VPN that employs SSL/TLS for encryption, they often do so through port 443, enabling secure communication over the internet.

Using port 443 is advantageous because it is often left open on firewalls and network equipment, making it easier for users to establish connections without encountering blocking issues. This capability allows SSL/TLS VPNs to traverse firewalls and proxy servers more effectively compared to other ports.

Other ports mentioned have different primary uses. For example, port 80 is the standard port for unsecured HTTP traffic, while port 88 is used for Kerberos authentication and port 1521 is commonly associated with Oracle database services. Understanding these specific port assignments is crucial for network security professionals to optimize their configurations and ensure secure communications.