@woozle There is a wifi antenna on my house and it's connected to router's WAN port by ethernet cable.

@woozle Thanks for your reply Woozle! I checked the "Operation Mode" menu and my C6 is set to "Access Point". And I am connected to my internet provider wirelessly. Do you please think I could change...

@woozle Yeah, this is something what was also not clear to me. I asked my internet provider who made initial setup of my router, so far I am waiting for response. And I have no other DHCP servers in...

I have reserved MAC and IP address of DEVICE1 (in Network / DHCP Server / Address Reservation). After a time, while DEVICE1 was turned off, I connected to my network a new DEVICE2 with different MAC...