Computer network setup: the great home network tutorial

The Home network tutorial (Home Network Tutorial) is especially for newcomers who are not yet familiar with network basics. Using my own network, I describe how to set up a Computer Network have set up. The "Computer network setup" is relatively simple and straightforward if some network basics are followed.


1. Network diagram

The network diagram shows the network to be set up. I will start in the 1.floor to show how this was set up and configured and why this was done.

2. The network on the 1.Floor – Setting up an Internet connection

In the 1. Floor is the Internet connection. The telephone socket (1.TAE) is essential for this. A splitter supplied by the Internet provider is connected to the telephone socket as a crossover network. The splitter separates the DSL-frequency and the low-frequency ISDN-signal (at the ISDN-connection). Only then it is possible to operate telephony and DSL over the 2 wires at the same time. The modem (yellow in the network diagram) is connected to the splitter. The modem serves as a "remote terminal" for the DSLAM in the exchange. With a modem and a splitter, a single PC can be connected to the Internet.

However, since a PC in the 2. Floor stands, a router must be installed. (Router1) This router contains an integrated switch. For clarity and understanding I have drawn the switch as an external device. A PC (PC1) is connected to the router(with integrated switch). Here are the IP addresses of the part of the network:

  • Router1:
  • clients:

PC1 obtains an IP address from the range of to automatically, so that no further configuration has to be made on this one. As the default gateway and DNS server, the PC1 obtains the IP address of the router.

2.1 Configuration Router1

On router1 the Internet connection configured. To do this, the user name and password provided by the Internet provider by mail must be entered. Additionally I disabled the WLAN at this router, because this is not necessary and would be another possibility for external attacks.

Apart from that, further settings are made at this router, like e.g.B. Port forwarding for certain programs which are otherwise blocked by default by the router for security reasons.

What still needs to be done? Since another router has to be placed in the network RIP (Routing Information Protocol) activated in version 1. This allows to exchange routing information with other routers and thus to communicate between multiple networks.

3. Home network problem between 2 floors

There turned out to be a problem. On the 1. There is no telephone connection on the first floor. Also, it is only possible to lay a network cable with a lot of effort. First I tried to connect to the router in the 1. floor to activate the W-LAN in order to get internet through it. Here it turned out that the connection would be very poor and unreliable.

The next way to connect 2 floors would be dLAN – one Network over the mains of the house. So-called dLAN adapters are plugged into the electrical outlets. The data transfer then takes place via this network. This allows transfer rates up to 54 Mbit/s with my adapters – more than sufficient. For security I configured the MAC addresses of the remote stations on both adapters, so that simply no one who taps into the power network, however, and can use Internet or even private data can read out. A password for the encrypted transmission of the data from adapter to adapter completes the whole thing.

The adapter on floor1 is connected to the router via LAN cable.

4. Set up network on floor2

Now the 2. Floor on. Here I had to make sure that one PC(wired) and one laptop(wireless) should have internet access.

Here again a router had to be installed. This router contains an integrated Access point and a switch (again shown by me as external devices in the network diagram). Router2 received from me the 192.168.0.X – Network. The network sets up as follows:

  • Router2:
  • PC2:
  • laptop:

The PC2 and the laptop automatically obtain an IP address from Router2 and do not need to be further configured.

5. WLAN configuration on Router2

To enable a secure W-LAN, Router2 must be configured accordingly.

Here are the points I set on Router2:

  • WPA2 Preshared Key as encryption method
  • Secure password with 63 characters (disjointed letters and numbers)
  • MAC table with the MAC address of the WLAN adapter from the laptop
  • SSID broadcast disabled
  • SSID name assigned without inference to my name or the model of the router

Thereby the WLAN should be encrypted in a timely manner. When connecting, the WPA password must be entered on the laptop. Then the laptop gets an IP address from the pool of to

I hope to have dealt with everything and I am available for further questions in the comment function. Should you need the Home Network Tutorial then I would like to point you to the RSS feed, which can be subscribed to for free.

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