where listenport is 7001 (if you manually deployed P6) or 8203 (if you used the wizard to deploy P6) by default and ContextRoot is p6 by default.
Examples:
http://serverIP:7001/p6/login
http://serverIP:8203/p6/login
Tips
HTTPS settings are available in the P6 Administrator application. If you have set the HTTPS/Enabled setting to true, ensure that your application server or front-end Web server is listening on the specified HTTPS port. See Configuring HTTPS Settings in the P6 Administrator application for more information on the HTTPS settings.
You can modify the context root. For information about context root configuration, refer to your application server documentation. Also, URLs might be case-sensitive, depending on your application server configuration.
See the Planning Your P6 EPPM Implementation guide for a list of supported application servers with version numbers.
For a full list of tested configurations for P6, see the Tested Configurations document.