Quelltext der Seite VPN unter Linux/en

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VPN (Virtual Private Network) is needed if you want to use your computer from outside the university to access services that are only accessible within the university network. VPN guarantees secure access to the university network through other networks (dial-up via other providers, external company or university networks).

==  What needs to be done? ==
* To use OpenVPN, you must first download a [[Netzwerkzertifikate|network certificate]].
* Use your package manager to install OpenVPN version >2.4 and the OpenVPN support for the network manager.
* Download the configuration file:
<center><iframe key="infoboard" width="600" height="320" path="vpn-config/index.php?group=uni&os=lin" /></center>
* Import the configuration file '''"OpenVPN-UPB-NG_*.ovpn"''' and the user certificate into the network manager.
* Connect to the university via OpenVPN.

* Configuring VPN on Linux

== Step-by-step instructions ==
=== Create network certificate  ===
To use OpenVPN, you must first install a [https://hilfe.uni-paderborn.de/Netzwerkzertifikate personal network] certificate. 

If you use the Wi-Fi "eduroam", the certificate is already installed on your computer.

=== Configuring VPN on Linux  ===
Download the configuration file, select the VPN you want to connect too and click on Download.

Usually "Uni-VPN (Standard)" should work, but if you have problems with the connection, try "Uni-VPN-TCP".
<center>
<iframe key="infoboard" width="600" height="320" path="vpn-config/index.php?group=uni&os=lin" />
</center>

At least version '''OpenVPN 2.4''' is required.

== Connection via the network manager of Ubuntu ==
There is also the possibility to set up the connection via the network manager of Ubuntu.

To use the network manager, the previously created network certificate must be unpacked:
: <code>$ openssl pkcs12 -in Network_Certificate.p12 -out Network_Certificate_OPVPN.crt.pem -clcerts -nokeys </code>
: <code>$ openssl pkcs12 -in Network_Certificate.p12 -out Network_Certificate_OPVPN.key.pem -nocerts -nodes </code>

The two new files, together with the network certificate, are copied to a secure location in the user directory. 


To do this, the necessary packages must first be installed via terminal:
: <code># sudo apt-get install openvpn network-manager-openvpn network-manager-openvpn-gnome</code>

Using the Network Manager (network connections) a new VPN connection can be created. To do this, click on "Add".

[[Datei:VPN_Unter_Linux_01.png]]

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[[Datei:Konfiguration importieren.png|links|300px]]

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In the next window the connection type OpenVPN must be selected.
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[[Datei:Zertikate einstellen.png|links|300px]]

Afterwards the just unpacked certificates must be selected. The CA certificate field should be filled automatically.

If the CA certificate field is not filled in automatically, the configuration file '''"openvpn-upb-ng-lin.ovpn"''' should be renamed to '''"openvpn-upb-ng-lin.pem"''' and additionally placed in the folder with the certificates. Then you can select the file as a CA certificate.

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[[Datei:VPN_Unter_Linux_05.png|links|400px|mini|Abgeschlossene Einrichtung]] <br><br>
After saving, the VPN connection can be activated via the upper system bar.

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