If you're referring to stock OpenWrt, the default router IP after flashing is 192.168.1.1.
It shouldn't...unless you changed it to that IP.
Sure it is. There's many programs that will scan a network...even some Windows port scanners work with WINE emulation layer...but you need to know your gateway to scan a different subnet than the one addressed on the router.
I have no idea which subnet is used. Can you give me a nmap example please? Maybe there is a script. But I have no idea how it can be done. My local nic has a certain Subnet and I want to search in other subnets.
Why do you think 192.168.8.1 is the right ip?
Have you tried getting an ip via dhcp?
After flashing a router with openwrt, the dhcp server is active and waiting for requests from a client.
Is the pc/notebook/netbook directly connected to the gl.inet?
I didn't flash the router already, I am preparing the router to do it and therefore I need a working cable connection to the rooter. 192.168.8.1 is the correct IP, which I know in the meantime, it is mentioned in the manual. It works now and I have no idea, why it didn't work a few days ago. Maybe a cache problem, but I tried to refresh the browser cache.