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#iptables

3 one-liners with this tag.

All one-liners tagged iptables

Back up iptables rules to a file

#iptables-save > /root/iptables-$(date +%F-%H%M).rules
harmlessFirewall

Block a single IP address immediately with iptables

#iptables -I INPUT -s 203.0.113.25 -j DROP
cautionSecurity

Restore iptables rules from a backup

#iptables-restore --test < /root/iptables-2026-10-09-1200.rules && iptables-restore < /root/iptables-2026-10-09-1200.rules
destructiveFirewall

Read first, then run.

The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

  • All commands are provided without warranty and are not tested on every system.
  • Understand what a command does before running it, and check every placeholder.
  • Make a backup first and, if possible, try it on a test system.
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