What Is the SSL Port?by Jim Campbell
Secured Sockets Layer (SSL) provides websites with encryption services. Encryption protects user data from being stolen by hackers who set software to read data packets that transfer between the server and the user's computer.
SSL runs on web servers on port number 443. The port is specifically configured for SSL services, but system administrators also can choose to run SSL on a different port number. If an alternate number is preferred, the administrator must manually configure the new port.
Identity theft and stolen data are concerns when browsing the Internet. SSL encrypts data, so the information is garbled and unreadable if it is intercepted. SSL protects the user from data theft, because hackers are unable to read the data or view the information being sent back and forth on the server.
SSL is used for several applications on a website. SSL typically is enforced when a user logs in to a website. It's used in banking, medical and other private information websites where the information passed requires security. The level of encryption used typically depends on the sensitivity of the information.