IP Networks Issue

Question

I've been facing this issue for quite a long time now, and couldn't figure out its logic. So let me explain what I have:

I have Xampp installed on a Linux Desktop PC which is connected to two local networks at the same time: The first one 192.168.1.0/24 doesn't go out to the internet, but the second one does 192.168.0.0/22 and is connected via Wifi.

My problem is that I can't access Xampp whith an IP address in the 192.168.1.X range when I'm connected to the 2nd network.

Keep in mind that 192.168.0.0/22's range is from 192.168.0.0 to 192.168.3.255.

However, I can access Xampp just fine when I put on an IP address in the 192.168.0.X, 192.168.2.X or 192.168.3.X ranges.

I know it probably has something to do with the 192.168.1.X range on the first local net. Is there any explanation to this? Thanks!

Answer 1

You're routing is messed up.

192.168.0.0/22 encompasses the IP range from 192.168.0.0 to 192.168.3.255 - this includes 192.168.1.0/24. There is no clean way you can route from 192.168.0.0/22 to 192.168.1.0/24.

You need to move the offline stub's subnet out of the connected subnet, e.g. use 192.168.129.0/24.