Change http port
By default, the CTFreak UI and API are accessible via http port 6700.
Update settings
Unless you have done a non-manual installation, you can change this value as follows:
Stop CTFreak service
Execute:
ctfreak config -n 8080
Start CTFreak service
Navigate to http://localhost:8080
Bypass settings
You also have the option to launch CTFreak by forcing the http port to use, regardless of the settings, using:
ctfreak run -n 8080