IP Based Authnetication

Trying block the other User to Access Safesquid.cfg interface expect IT Admin(i.e me and my IP address is
So I tried these Steps

Configure → Application Setup → Access Restrictions → Add New Policy

Created this Policy

I have entered the IP i want to Block and also give Username & Password
and saved it
after that i restart safesquid

Problem :- Policy is not working, I am still able o access websites from these ip machines. Its not asking for password

Please Guide me how i can restrict other user from access of safesquid.cfg

Just Remove CONFIG from ACCESS list

After when you will open browser of IP Machine it will ask you for USER and PASSWORD

Give the Username and Password

and Now Access safesquid.cfg it will show like this