linux-iptables-block-ip¶
Linux iptables, quick, simple and effective way to block an ip address or subnet range.
Syntax for Linux iptables command to block or drop an ip address¶
iptables -A INPUT -s IP-ADDRESS -j DROP
Example for Linux iptables command to block and ip¶
# iptables -A INPUT -s 65.55.44.100 -j DROP
Example for Linux iptables command to block a port for a specific ip address¶
# iptables -A INPUT -s 65.55.44.100 -p tcp --destination-port 25 -j DROP
Example to remove or unblock and ip address from the iptables list¶
# iptables -D INPUT -s xx.xxx.xx.xx -j DROP
# iptables -D INPUT -s 65.55.44.100 -j DROP
Remember to safe your iptables!¶
# service iptables save