HOW TO: Check if IP is blocked from IPtables

Checking if an IP is blocked in IPTABLES

Check if IP is blocked:

iptables -L -n –line | grep [IP Address]

If IP appear as DROP or REJECT, the IP has been blocked

Unblock the IP Address:

iptables -I INPUT -s [IP Address] -j ACCEPT

Blocking back an IP Address:

iptables -A INPUT -d [IP Address] -j DROP

service iptables save

===============================================================

To unblock an IP from the CSF from SSH, please follow the steps below:

2. To check if the IP is blocked by CSF, please execute the following command:

csf -g IP_address

Note: IP_address being the specific IP you wish to check.

3. If the IP is denied and you wish to remove it, please execute the following command:

csf -dr IP_address

4. To complete the process, you will need to restart CSF for the changes to take effect:

csf -r

===============================================================

Note: Full path to IPTABLES is /sbin/iptables, you can replace command # iptables with /sbin/iptables