One need to perform below mentioned steps to whitelist/blacklist an IP address from Linux server firewall - CSF:
1) Login into the Web Host Manager - WHM
2) Click on Configure Server Security & Firewall from plugins menu.
To Whitelist IP address:
- Click on "Firewall allow IP" to Whitelist the IP address.
- Enter the IP address which needs to be whitelisted.
- Click on change button and restart the firewall.
To Blacklist IP address:
- Click on "Firewall Deny IP" to blacklist the IP address.
- Enter the IP address which needs to be blacklisted.
- Click on change button and restart the firewall.
Thanks,
Shane G.
AccuWebHosting.Com