Is it true that DPI-SSL examines SSL traffic regardless of the port number?

The answer is that it is true that DPI-SSL examines SSL traffic regardless of the port number. DPI-SSL, or Deep Packet Inspection for SSL, is a feature designed to inspect encrypted SSL traffic to identify potential threats or malicious content that may be hidden within SSL tunnels.

This capability allows the firewall to decrypt, inspect, and then re-encrypt SSL traffic, which is essential for maintaining security, as a significant volume of internet traffic is now encrypted. By not being limited to standard ports (such as port 443 for HTTPS), DPI-SSL provides comprehensive coverage against threats that might be using non-standard ports for SSL connections.

In scenarios where attackers attempt to circumvent security measures by using non-standard ports for SSL traffic, this feature ensures that traffic is still subject to inspection. This holistic approach to traffic inspection helps organizations maintain a robust defense against a range of network-based threats, regardless of how the traffic is transmitted.