You are using phpFox version earlier than 4.6.0? Please refer instruction for this article here.

We include a security setting that allows you to restrict access to the Admin CP by IP addresses that you allow.


Always clear cache after making any changes.

If you set this and then cannot log into your AdminCP, you will need to go to the database to change this or send us a support ticket if you have active support or purchase support if you need to.