iptables

Configure tables, chains and rules of the Linux kernel IPv4 firewall. Use ip6tables to set rules for IPv6 traffic. See also: iptables-save, iptables-restore. More information: <https://manned.org/iptables>.

Install

All systems
curl cmd.cat/iptables.sh
Debian Debian
apt-get install iptables
Ubuntu
apt-get install iptables
Alpine
apk add iptables
Arch Arch Linux
pacman -S iptables
image/svg+xml Kali Linux
apt-get install iptables
CentOS
yum install iptables
Fedora
dnf install iptables
Windows (WSL2)
sudo apt-get update sudo apt-get install iptables
Raspbian
apt-get install iptables
Dockerfile
dockerfile.run/iptables
Docker
docker run cmd.cat/iptables iptables powered by Commando

Configure tables, chains and rules of the Linux kernel IPv4 firewall. Use ip6tables to set rules for IPv6 traffic. See also: iptables-save, iptables-restore. More information: <https://manned.org/iptables>.

  • View chains, rules, packet/byte counters and line numbers for the filter table:
    sudo iptables --verbose --numeric --list --line-numbers
  • Set chain [P]olicy rule:
    sudo iptables --policy chain rule
  • [A]ppend rule to chain policy for IP:
    sudo iptables --append chain --source ip --jump rule
  • [A]ppend rule to chain policy for IP considering [p]rotocol and port:
    sudo iptables --append chain --source ip --protocol tcp|udp|icmp|... --dport port --jump rule
  • Add a NAT rule to translate all traffic from the `192.168.0.0/24` subnet to the host's public IP:
    sudo iptables --table nat --append POSTROUTING --source 192.168.0.0/24 --jump MASQUERADE
  • [D]elete chain rule:
    sudo iptables --delete chain rule_line_number

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