Why do I need an internet gateway to browse?

Hello,

I have a solid internet wireless internet connection to my modem from my laptop but i just can't seem to get the internet unless an internet gateway connection appears in my network connections. this is very frustrating because that connection comes and goes and i just just don't understand why.

I should not need a gateway connection to access the internet and to be honest i never did before. I just stopped being able to access the internet unless it this second connetion appears.

Can someone help me please...