Configure IP access rules to allow or deny access for this user.

You can define IP access rules to allow/deny users' access based on IP address for this user.
If you do not specify any IP address, this user can logon from any IP address. But if you set an allow list, the user can only access from the IP addresses allowed in the list. If you set a deny list, the user can obtain access by all IP addresses except those in the deny list.
For example:
Allow 127.0.0.1
Refuse user's connection from any IP except 127.0.0.1.
Deny *
Allow 127.0.0.1
Refuse user's 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.
*.*.*.* 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),
218.123.2.1/29 (represents any IP between 218.123.2.1 and 218.123.2.9)