Firewalld is one of the Linux firewall management tool and it is available on the in the Ubuntu's default repositories, therefore it is available to
be installed from these repositories using the apt packaging system.
apt packaging system
How to open port for a specific IP address on CentOS 7. Using the firewall-cmd command with add-rich-rule parameter.
Windows command prompt basics commands like ping, telnet, dir, cd, ipconfig and tools like Task Manager, Services, Registry.
How to prepare a Windows Java Development Machine using Eclipse, NetBeans, Ant, Maven, MySQL, MongoDB, GIT, SVN.
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