Removing a valid IP from IPTables or blacklisting a hacker IP / Blog, Dialer Tips, General Tips / By admin To remove a valid IP address from the iptables, log in via SSH and enter the following commands:iptables-save > tmp_filenano tmp_fileRemove / delete the line containing the valid IP addressiptables-restore < tmp_file & iptables-saveTo block an IP (example 111.222.333.444), please use the following command:iptables -A INPUT -s 111.222.333.444 -j DROP & iptables-save