Customer is continually being blocked by cPanel/WHM servers
If customers are continually being blocked by cPanel/WHM it is important that the root cause of the issue is identified and resolved. Whitelisting IPs is a good temporary measure, but, typical users ISPs provide dynamic IPs, so, when these change, the whitelist no longer works and the user, having not solved the root cause of the issue, will simply be blocked again.
Ono the Cartika shared/reseller cPanel/WHM servers, we run a combination of security layers, including IPTables, CSF and our own Webscan script
All of these layers all block IPs and traffic, and provide various levels of web service and application level security from common, day to day attacks. If these systems are being triggered by a legitimate user, the root cause needs to be addressed in order to permanently resolve this issue
the most common causes for such blocks include
- The web owner's mail client has a very low "mail check interval", causing a denial of service attack like behavior, especially if many users are accessing mail through a common corporate connection.
- The web owner failed to successfully authenticate in a mail, web, FTP or cPanel services interface multiple times, leading the firewall to think its a brute force attempt.
- The web owner has an FTP client set with very high number of simultaneous connections, causing the firewall to think the connection attempts is a denial of service attack.
- A website update was interpreted as a hack attempt by the web application firewall (mod_security).
Please contact us if you are blocked so that we can remove your IP from the system blocking you. Customers are then encouraged to go through the list above and once addressed, the issue should resolve itself
For users in unusual scenarios, where their normal day to day usage (outside of what is listed above) is causing blocks (ie many people access the site normally from a single IP), please contact us to work out a custom solution for your needs
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