ipset

A tool to create IP sets for firewall rules. More information: https://manned.org/ipset.

• Create an empty IP set which will contain IP addresses:
  ipset create {{set_name}} hash:ip
• Destroy a specific IP set:
  ipset destroy {{set_name}}
• Add an IP address to a specific set:
  ipset add {{set_name}} {{192.168.1.25}}
• Delete a specific IP address from a set:
  ipset del {{set_name}} {{192.168.1.25}}
• Save an IP set:
  ipset save {{set_name}} > {{path/to/ip_set}}