How do I quickly block an IP address

To block an IP address in Linux run the following from a command prompt running as the root user. Replace IP-ADDRESS with the actual xx.xx.xx.xx IP address.

iptables -A INPUT -s IP-ADDRESS -j DROP

If using firewalld the command is:

firewall-cmd --permanent --add-rich-rule="rule family=ipv4 source address=xx.xx.xx.xx reject"
firewall-cmd --reload

block, ip, address

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How do I quickly block an IP address

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