Firewalls

Contents:

• firewalld
  • List active ports
  • Get active zones
  • Open a port
  • Close a port
  • Enable the change
  • Make sure the change is in effect
  • Reject connections to a port
  • Forward traffic from a specific address to another port
  • remove a traffic forwarding rule
• iptables
  • Save the current iptables ruleset
  • Load a ruleset
• nft
  • list all rules
  • list rules in a table
  • list rules in a chain
  • deleting rules
  • Links
• ufw
  • Basic stuff:
  • Note form the man page: