The default port number of the Web server is 80. If you change it to 88, you should use the domain name: 88 to access your Web server. Moreover, port numbers less than 1024 are all known port numbers, so it is not recommended that you use port number 88, and it is recommended that you use unknown port number 8080;

There are different ways to modify the system by using different port numbers. For example, in Microsoft IIS, modify the port number in the general properties of the website. For Linux, modify it in the configuration file httpd.conf of the Web server.