The servers you are on run Firewall software called "CSF" for short, ( Config Server Firewall). So if you find that you can visit the world wide web "EXCEPT" it would seem for your web site, your webmail, your cPanel or just about anything to do with your web site, your IP could in fact be blocked, this normally happens after you have tried to login to your cPanel, or webmail a number of times and failed.
We are going to show you how to get unblocked using the "WHMCS-CSF Auto Unblocking Module", you can just go to your Client Area or Portal and in a few minutes and with a few key strokes you can check if you are blocked and unblock yourself.
Let's start from the point that you have logged into that client area, if you do not know how or remember how to login to your client area see the article on "How to Login to The Client Area".
Once you have logged in a new menu item will appear under the Support menu called Unblock IP. Click this link and a page will be displayed with your IP address. Click the button marked "Check for IP Block and Remove" and the system will search our firewall database for your IP address. If a match is found it will list the reason the block occurred and will be given the option to remove it from the firewall.
If you were being blocked and you requested the block be lifted you would now see notice that your request was a success and will be lifted within 15 minutes. Once that time period has passed you should be able to view your web site, send and receive emails and all other services should be operational again. If they are not, please submit a support request for more assistance.