cPanel JailShell, Unmount and Clean Virtfs
If you’re a sysadmin of Cpanel server, you might be aware of the JailShell. Its nothing but a User Shell with limited privileges. Users requesting for shell access to the webhosting server are provided with such shell instead of bash (Which provides root level privileges to users) . Jailshell limits the users access to their [...]
fork: resource temporarily unavailable ???
If you are getting Linux error message, Resource temporarily unavailable, it’s because your system is limiting the number of files / processes / CPU that your particular user ID can use. If you use WHM/Cpanel, enabling the “Shell fork bomb protection” can make the “Resource temporarily unavailable” message appear more often. You may get rid [...]
Opening ports in the firewall for the Mail Server
There are standard ports that are used to access most services. For example, accessing a website generally uses port 80 for normal (HTTP) web pages and port 443 for secure (HTTPS) pages. Smtp Smtp generally uses port 25 for connections although there are recommendations for port 587 (see the official documentation for details). Pop and [...]
Installing Shoreline firewall (Shorewall) in RHEL
Shorewall is the common name for the Shoreline firewall, a “wrapper” for IPTables that will handle all the heavy lifting for you by simplifying the tasks. This article will get you started, showing you how to get Shorewall on your system. Installation Now then, I have good news and bad news for you. The bad [...]
