FirstPort is a position-independent directive that normally appears toward the top of config.txt/ezproxy.cfg. In the absence of a FirstPort directive, EZproxy uses port 2048 as its first port.
FirstPort only applies when using EZproxy in proxy by port. FirstPort should be followed by the first port number that EZproxy should use to assign ports when creating virtual web servers.
Name LoginPort LoginPortSSL SkipPort