The default HTTP service port number of the server is 80.

The default port number of nginx is 80, which was defined by the Internet Engineering Task Force (IETF) when it formulated the HTTP protocol. These port numbers are widely used because they have been widely assigned to HTTP and HTTPS services and are supported by various network devices and software.

Port number 80 is usually used for HTTP connection and is one of the most common web service ports on the Internet. Due to the universality and universality of HTTP protocol, many network devices and firewalls will open this port by default, allowing HTTP traffic to pass through.