SSH is a TCP/IP service that provides a secure mechanism for remotely logging into one system over either a local network or the internet into another system. SSH also provides the ability to transfer files between remote systems. When a user logs into a remote system using SSH, they receive a command prompt allowing them to enter commands on the remote system as if they were sitting at the remote system and had opened a terminal session.
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Secure Shell (SSH) is a TCP/IP service that provides a secure mechanism for remotely logging into one system over either a local network or the internet into another system. SSH also provides the ability to transfer files between remote systems. When a user logs into a remote system using SSH, they receive a command prompt allowing them to enter commands on the remote system as if they were sitting at the remote system and had opened a terminal session.
In this chapter we will cover the steps necessary to configure a Fedora Linux system to accept SSH connections. This involves installing the SSH server on the local systems and configuring the firewall to allow SSH connections.
In this chapter we will cover the steps necessary to configure a Fedora Linux system to accept SSH connections. This involves installing the SSH server on the local systems and configuring the firewall to allow SSH connections.
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or by using the GUI Service Configuration tool accessed via the ''System->Administration->Services''' menu option. Once the tool has loaded, simply scroll down the list of services until you reach ''sshd''. Select it and click on the ''Start'' button located in the toolbar.
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The service may also be started by using the GUI Service Configuration tool accessed via the ''System->Administration->Services'' menu option. Once the tool has loaded, simply scroll down the list of services until you reach ''sshd''. Select it and click on the ''Start'' button located in the toolbar.
== Configuring the Fedora Linux Firewall to Allow SSH Connections ==
== Configuring the Fedora Linux Firewall to Allow SSH Connections ==
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Where ''username is the name of the user you wish to log in as and ''ipaddress'' is the IP address of your system. You can also substitute the hostname of the system in place of the IP address. If you do not know the IP address run the ''ipconfig'' command in a terminal window. This will output information similar to:
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Where ''username'' is the name of the user you wish to log in as and ''ipaddress'' is the IP address of your system. You can also substitute the hostname of the system in place of the IP address. If you do not know the IP address run the ''ipconfig'' command in a terminal window. This will output information similar to:
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== Disabling the SSH Server ==
== Disabling the SSH Server ==
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Having configured the system to run the SSH server we can now look at how to disable it. As we mentions previously the SSH server runs in the background as a service. In order to disable SSH we need to turn off the SSH service. This can be achieved using the ''Services'' tool or from the command line. To disable the sshd service from the command line:
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Having configured the system to run the SSH server we can now look at how to disable it. As we mentioned previously the SSH server runs in the background as a service. In order to disable SSH we need to turn off the SSH service. This can be achieved using the ''Services'' tool or from the command line. To disable the sshd service from the command line:
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To launch the services tool click on the desktop ''System'' menu and select ''Services'' from the ''Administration'' sub-menu. Enter your password when prompted to do so. The Services tool will appear containing a list of all available services. Scroll down to find the ''sshd'' entry as shown below:
To launch the services tool click on the desktop ''System'' menu and select ''Services'' from the ''Administration'' sub-menu. Enter your password when prompted to do so. The Services tool will appear containing a list of all available services. Scroll down to find the ''sshd'' entry as shown below:
