0 Block the ip address on the linux

Recently, I have the need to block the ip address on the Linux host, here are some notes.

route command require root privilege.

List active connection

netstat -tcp --numeric 

Check current routing table

/sbin/route -n

 

Reject ip using routing table

/sbin/route add -host 192.168.56.1 reject

Remove the rule from routing table

/sbin/route del -host 192.168.56.1 reject