Hi @cyberminion,
At Firewall > Aliases, there is an Import button on the bottom.
Paste in the aliases to import separated by a carriage return. Common examples are lists of IPs, networks, blacklists, etc. The list may contain IP addresses, with or without CIDR prefix, IP ranges, blank lines (ignored) and an optional description after each IP. e.g.:
172.16.1.2
172.16.0.0/24
10.11.12.100-10.11.12.200
192.168.1.254 Home router
10.20.0.0/16 Office network
10.40.1.10-10.40.1.19 Managed switches
Thank you,
-James