The ADSL and Internet flashes go off

John Galt said:

How old is your router and your modem? Tell us about the network hardware: everything from the DSL service line to your computer.

I'll try another one once I get it.
it's about 5 years old. here's more: 300Mbps Wireless N ADSL2+ Modem Router - TP-Link

the issue is fixed now.
the problem was with Primary and Secondary DNS Servers, I filled them with a DNS with blocked my internet connection. I had to delete it.

DNS
		DNS Relay	:	Use Auto Discovered DNS Server Only Use User Discovered DNS Server Only
		Primary DNS Server	:
		Secondary DNS Server	:

I would like to thank you all for you help and suggestions.