The Problem now looks the same as descriped in post 3 with ip-firewall in use.
So what can be the problem here?
Does i need different ip-adresses on one side to get it working?
Or does the router didn’t support that what i wanna do?
Ah… I guess now I see…
Just a guess but worth a shot:
This would filter replies as well because the replies go to a different dst-port.
Try adding an accept rule for src-port=80 as well.
Or, when going via IP firewall, accept all established and related connections and add ‘new’ for dst-port 80.
-Chris
Thanks!
Now its working as mentoned!
I will try it out with nmap if it is working correctly 
But until this,
Thanks Chris!