OpenSSH is a FREE version of the SSH connectivity tools. For many users of telnet, rlogin, and ftp, they may not realize that most of the time their password is transmitted across the Internet unencrypted. With OpenSSH, it encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other attacks. Besides that, OpenSSH provides secure tunneling capabilities and several authentication methods, and supports all SSH protocol versions.

To setup and enable OpenSSH for SUSE/OpenSUSE, here are some simple steps to take:

1. Navigate to Yast
2. Select install software
3. From within the search box type openssh and choose install
4. Now get back to yast and go to security and users
5. Select firewall and select allowed services
6. From the services to allow, choose the secured shell server (refer to the above picture)

Happy Trying!

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How to setup and enable OpenSSH

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Sometimes the font size for your newly installed SUSE is too small for your reading pleasure. There are several ways to configure the font size. One method is to use the configuration utility for your window manager.

If you are using KDE then the configuration utility is called kcontrol. You can run it by typing kcontrol at a command prompt in a terminal emulator window. If you are using Gnome then you can select fonts by running gnome-control-center. This method however does not rectify the font size for Yast and Sax2. The other way is to go into the terminal, type su and enter root password, then type qtconfig and just choose the font that you want to use.

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How to change font size for Yast and Sax2

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YaST provides a extremely easy way for system administrators to manage which services run at boot. The YaST Runlevel Editor module is easy to understand and gives you important information about each service. You can choose to start or stop a process with nothing more than a mouse click.

To view what are the what services that are currently running, you can open the Runlevel Editor module from the YaST System page. It will display a list of all the available services. If you change the configuration file for a particular service, you usually have to stop and restart the service to use the new configuration. For example, when making changes to the X server, it is often worthwhile to change from Runlevel 5 to Runlevel 3 to test the changes, then switch back to re-enable the display manager. This way, if you make a mistake, you can fix it and get it right without having to reboot every time.

e.g. To stop, start, or restart any service, open a shell as the SuperUser. To see if your ALSA sound server is running, type the following:

/etc/init.d/alsasound status

The script will report its status. It should report

ALSA sound driver loaded.             running

To stop and restart the service, type

/etc/init.d/alsasound restart

and the following should appear:

Shutting down sound driver               done

Starting sound driver:  via82xx          done

Restoring the previous sound setting     done

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Manually Starting and Stopping Services in Suse/OpenSuse

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• How to configure YaST firewall for BitTorrent

The most file sharing protocol is non other than the famous BitTorrent protocol. However sometimes you may be experiencing slow downloads when sharing P2P files when using BitTorrent client e.g. Utorrent. This is most likely to occur when your computer is behind a home router or software firewall. The OpenSuse firewall -YaST makes it nearly impossible to use the BitTorrent protocol. Extremely slow download times could be the end result.

However, there are two ways that may help to get BitTorrent running smoothly:

1. Start the YaST firewall and select the zone you want to allow services for (where you want the enabled port). Click [Advanced] and enter the correct information (syntax from-port:to-port numeric). Click [OK], and YaST will ask you if you are sure. Click [Continue] to return to the main dialog; click [Cancel] to re-enter the port numbers. After returning to the main menu, click [Next] and [Accept] to finish configuration.
2. Open the /etc/sysconfig/SuSEfirewall2 file in any text-editor Add the required ports to the FW_SERVICES_EXT_TCP, FW_SERVICES_INT_TCP or FW_SERVICES_DMZ_TCP variable. (# Examples: “ssh”, “123 514″, “3200:3299″, “ftp 22 telnet 512:514″)

You may try to add TCP: “6881:6999″ but this could result in a security risk. Always remember this is because not only P2P clients can use this port.

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How to configure YaST firewall for BitTorrent

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