Site_url Issues

Hello!
I am using a 3rd party app to integrate suitecrm and another app but it asks for my crm site url. I knew the http://localhost/suitecrm may not work but I tried anyway. I also thought I could maybe change it to a different domain in the config.php file but it said it wasnā€™t found. Is there a step Iā€™m missing? Do I need a registered domain first to change http://localhost/suitecrm to the domain I want there and if so, what next?

the site url setting are located in the config.php file under the tags:
ā€˜host_nameā€™ => ā€˜localhostā€™
ā€˜site_urlā€™ => ā€˜http://localhostā€™,
Just replace ā€œlocalhostā€ with your LAN IP address. Go ifconfig or ipconfig/all depending on your OS and get your serverā€™s IP. If you want to contact the CRM from WAN you will need to port fwd or nat.