From the blog
How to Block XML-RPC Attacks on CentOS & cPanel Servers
XML-RPC is a protocol that uses XML to encode the calls and HTTP as a transport layer for its communication. XML-RPC means literally: XML Remote Procedure Call. It’s widely used in web applications, specilly by CMS like WordPress. Today we will show you how to Block XML-RPC Attacks easily. WordPress uses this XML-RCP to extend its functionality and features,…
Read More »How to fix: mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication
After upgrading a PHP server from PHP 5.3.3 to PHP 5.6.x, working with MySQL Server 5.1.x on a plain CentOS 6.x 64 bits box, there were a few new web apps were showing this mysqlnd connection error: mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication This was the complete and exact error: mysqlnd cannot connect to…
Read More »Error 0x800CCC80 in Outlook Email Client
Error code 0x800CCC80 in Outlook ‘None of the authentication methods supported by this client are supported by your server‘ is a very common type of error when users are working with Outlook Email client. How can I fix 0x800CCC80 error in Outlook? If your email server runs cPanel, one quick fix is this: Browse to WHM >> Exim Configuration…
Read More »KernelCare Installation Guide
KernelCare is fabulous kernel update tool by CloudLinux. We started testing this kernel patch in a few servers and the result has been truly amazing, allowing us to avoid server downtime after kernel updates because of each server reboot we had to apply after the kernel was updated. Today we will show you how to run a KernelCare…
Read More »How can I Turn On TCP SYN Cookie Protection on Linux?
Are you under DOS attack on your cPanel or Linux server and you need to stop that syn flood to avoid downtime? Many VPS and Dedicated servers suffer syn flood attacks on their systems, it’s something really normal on Linux servers. One type of attack is called SYN Attack. TCP Syn attacks are what it is called as…
Read More »How can I Fix Wrong Disk Usage on cPanel?
Sometimes WHM and cPanel are displaying certain amount of disk usage for one particular cpanel user, but that’s not the real disk usage, you find out that it is an incorrect disk usage. When the system is showing wrong disk usage on cPanel, you will have to investigate user’s disk usage using the shell. How to fix wrong disk…
Read More »How to Check if the cPanel Ports are Open
cPanel uses a few special ports to serve apps & services for their cPanel, Webmail and WHM logins. And sometimes users may experience issues with non-standart HTTP ports. On this post, we will start learning the basic cPanel Ports, and a way to see if this ports are open or not. What are the default cPanel Ports? cPanel…
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