Site access restriction management is performed in the section "Hosting → My sites → Access limitation»:
To configure access restriction, do the following:
Opposite "Default»Set the switch opposite the desired method of restricting access:
If your current address should be in the list, use the corresponding buttons:
In field "List of IP addresses
»Add the required addresses to the list. You can add both single addresses and subnets in the format CIDR
... For the convenience of the calculation, you can use the tool onlinecalculator
Wait approximately 15-30 minutes for the changes to take effect.