Let’s say that you want to check whether or not a specific IP address, maybe 126.96.36.199 , is blocked by CSF. That’s easy!
csf -g 188.8.131.52
Unblock an IP Address
If the IP address is denied in CSF and you want to remove it, then use this command:
csf -dr 184.108.40.206
CSF then needs to be restarted for the change to take effect: