Configure IP access rules to allow or deny access for the entire server.

You can define IP access rules to allow/deny users' access based on IP address for the entire server.
If you do not specify an IP address, the administrators can logon the server with any IP address. But if you set an allow list, the administrators can only obtain access by IP addresses specified in the list. If you set a deny list, the administrators can have access to the server by any IP address except those specified in the deny list.
For example:
Allow 127.0.0.1
Refuse all users' connection from any IP except 127.0.0.1.
Deny *
Allow 127.0.0.1
Refuse all users' connection from any IP, since 127.0.0.1 after * impacts nothing.
Rule list
The Rule list shows the current list and the order of IP rules. Rules can be added or removed from the list using the Add and Delete buttons.
Also, the order of the rules may be altered using the Up and Down buttons on the right of the rule list.
Supported wildcards
IP address ranges and wildcards are supported by Wing FTP Server, as below:
xxx.xxx.xxx.xxx
IP address must be exactly matched(e.g. 192.168.1.1).
xxx.xxx.xxx.xxx-yyy
A specified range of IP addresses, e.g. 192.168.1.10-25.
xxx.xxx.xxx.xxx-yyy.yyy.yyy.yyy
A specified range of IP addresses, e.g. 192.168.1.0-192.168.5.255.
*.*.*.* or xxx.*.*.* or xxx.xxx.*.* or xxx.xxx.xxx.*
Any valid IP address value (For example, 192.168.*.* represents any IP between 192.168.0.0 and 192.168.255.255).
CIDR convention is also supported :
192.168.0.0/24 (represents any IP between 192.168.0.0 and 192.168.0.255)
Priority
The server's IP Access list has priority over domain's IP Access list.