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→Understanding the lokkit Firewall Customization Screen
'''SSH''' - The secure shell provides an encrypted mechanism for allowing password protected remote access to your system. With SSH you can remotely log into to your system, copy files to and from your system and anotehr system and perform remote execution of programs. If you need remote access to your system you will need to activate this. If you do not need remote access leave this disabled. Note that the ssh server is not installed by default on Ubuntu Linux.
'''Telnet''' - Telnet provides remote terminal access to your system. It does not use encryption and use is strongly discouraged. Leave this disabled and use SSH instead fopr remote access.When you have finished making selections tab to the ''OK'' button to return to the main screen and tab to ''OK'' again to exit ''lokkit''.
'''WWW (HTTP)''' - If you are hosting a web serv eron your Ubuntu Linux System you will need to enable HTTP traffic through the firewall to enable web page requests to reach the http server. If you do not plan to host a web server leave this disabled. Note that the Apache web server is not installed by default on Ubuntu Linux.