====== Connecting Your Computer to CSN ======

In order to connect a computer to CSN only a few settings have to be made. All required network parameters will be obtained automatically via [[http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol|DHCP]] in CSN. Manually setting the parameters mentioned in the confirmation e-mail is not necessary!

In the following, we will describe how to establish a connection to CSN and which settings have to be made in the different operating systems to enable the automatic obtaining of the network parameters via DHCP.

**In any case, the [[:en:anleitung:anmeldung|registration]] with CSN and the activation of your port is a prerequisite for establishing a connection.**

===== Cabling =====

In every room there is a network outlet for connecting so-called twisted pair cables (TP cables) with RJ45 plugs. These cables are commonly referred to as patch cables. There are two jacks per outlet in most of the dormitories. In order to connect your network card with any one of these jacks you need such a //shielded// patch cable of category 5 (Cat5) or higher. In the below image you can see an example of a patch cable.

{{ :anleitung:patchcable_black_20m.jpg?300 }}

<note important>ISDN (Cat2) or unshielded TP cables are unsuitable even if they physically fit at first glance.  These cables may lead to problems and can even damage our hardware as well as your network card. So-called crossover cables are also not suitable since in one of the plugs of these cables certain leads have been swapped ("crossed over"). Hereby, you can, for example, connect two computers directly.</note>

<note tip>In case you have a problem please contact your local CSN contact person. We have measurement equipment for troubleshooting with which we can quickly detect cut cables, slack joints, wrong cables and further problems.</note>

After the physical connection has now been established, you can go on with the configuration of your operating system. Please observe the following information.

===== Configuring Your Operating System =====

==== General Considerations ====

A manual configuration of the network parameters is not needed and will not work because of security measures in our network devices. Therefore, all network parameters have to be obtained automatically ([[http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol|DHCP]]). The parameters mentioned in the confirmation e-mail are for your information only! In the following instructions for the most commonly encountered operating systems are given.

==== Windows 10 ====
  - Click the Windows button in your Task bar
  - Click the Settings button (Located 2 Buttons above the Windows Button now and looks like a gear)
  - Choose the menu item Network and Internet
  - Click reset network in the bottom section
  - Confirm with reset now

==== Windows Vista/7/8 ====

  - Press {{:windows_key.png?nolink&}}+<key>R</key> on your keyboard.
  - Type ''ncpa.cpl'' and press ENTER (<key>↵</key>).
  - Right-click the wired ethernet adapter and click ''Properties'' in the menu. The wired ethernet adapter has a small plug symbol next to the two screens.\\ {{:en:anleitung:windows7-dhcp1-eng.png?direct&200}}
  - Select ''Internet Protocol Version 4 (TCP/IPv4)'' ① and click on ''Properties'' ②.\\ {{:en:anleitung:windows7-dhcp2-eng.png?direct&200}}
  - Check both ''Obtain an IP address automatically'' ③ and ''Obtain DNS server address automatically'' ④ and click ''OK'' ⑤.\\ {{:en:anleitung:windows7-dhcp3-eng.png?direct&200}}
  - No further steps need to be taken and all opened windows can be closed now.

==== Older Versions of Windows ====

{{page>:en:warnung_alte_os&nofooter}}

==== Ubuntu ====

  - Right-click the network symbol (two opposite arrows) ① in the upper panel on the desktop.
  - Click ''Edit Connections...'' ②.\\ {{:en:anleitung:ubuntu-dhcp1-eng.png?direct&200}}
  - Select the wired network adapter (often ''eth0'') ③ and click ''Edit...'' ④.\\ {{:en:anleitung:ubuntu-dhcp2-eng.png?direct&200}}
  - Select the tab ''IPv4 Settings'' ⑤ and choose ''Automatic (DHCP)'' ⑥ in the ''Method'' menu .\\ {{:en:anleitung:ubuntu-dhcp3-eng.png?direct&200}}
  - Click on ''Apply...'' ⑦ and close the opened windows.

==== Mac OS X ====

Coming soon ...

==== Other Operating Systems ====

For all other operating systems no detailed instructions can be given. Here are some general hints for the corresponding configuration.

^ TCP/IP Settings | Obtain network parameters (IP, DNS server) **via DHCP** |
^ DNS Server | **134.109.83.200** (primary) and **134.109.83.201** (secondary)\\ only needed if problems occur when obtaining these parameters automatically |
^ Time Server (NTP) | **ntphost1.csn.tu-chemnitz.de**\\ **ntphost2.csn.tu-chemnitz.de** |

<note tip>In case you have problems or questions the CSN contact persons can surely help you.</note>