At the moment I am working trough the setup of me new home server and read the documentation, Howto and post in the forum. Now I am total confused what the gateway is.
Lets start with installation when you going through the first setup.
I have to insert the IP address for the first NIC (green). Because it isn’t possible to use DHCP from the router I used 192.168.0.50. The router has 192.168.0.1
The default IP address for the gateway is 192.168.1.253.
Why is it X.X.X.253?
If I kept it as 192.168.0.253 the server couln’t get an internet connection. @Ctek had the same problem. You can read it in his Howo Install Nethserver as AD with linux and windows clients
AS I changed it to 192.168.0.1 it works.
After the setup is finish I started via the browser the setup of the second NIC. Also there is a field for a gateway IP address.
Do I need one?
Which IP is the correct one?
Is this depend on the LAN infrastructure?
Some principle information in the documentation, maybe with a sketch of the physical setup as @Ctek did, would help to make the right settings.