Knowledgebase


Portal Home > Knowledgebase > Linux > Security > How can I block a IP address?


How can I block a IP address?




To block an individual IP address from accessing your Linux server, you can use the following iptables command:

iptables -A INPUT -s IPADDR -j DROP


Simply replace IPADDR with the IP you want to drop all packets from.


Block ranges of IP's


Here is an example of a range block:

iptables -A INPUT -s 192.168.0.1/24 -j DROP


This would block 192.168.0.1-255


Unblock the IP


Simply change "DROP" in the commands above to "ACCEPT".



Was this answer helpful?

Add to Favourites Add to Favourites    Print this Article Print this Article

Also Read
How to use iptables? (Views: 3813)

Language: