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Standard packet filtering and NAT administration utility for the Linux kernel Netfilter framework.
A standard LINUX utility used across offensive reconnaissance, packet forensics, and defensive system administration.
Direct visibility into network interfaces, protocol frames, access controls, or filesystem structures without graphical overhead.
During live system triage, initial reconnaissance, forensic capture inspection, or baseline configuration auditing.
# Standard on Linux distributions
sudo apt install iptablesHost firewall policy configuration:
- List current rules with line numbers: sudo iptables -L -n -v --line-numbers
- Block incoming traffic from malicious IP: sudo iptables -A INPUT -s 198.51.100.25 -j DROP
- Allow incoming HTTPS on eth0: sudo iptables -A INPUT -i eth0 -p tcp --dport 443 -j ACCEPT
- Save rules: sudo iptables-save > /etc/iptables/rules.v4