Solved "Gameguard connecting please wait" problem

I wanted to comeback today after a half year without playing diablo, the matter is i got the "gameguard connecting please wait" problem, i've made a clean install, cleaned the registry etc, firewall turned off, antivirus off, run as administrator, xp compatibility, etc but it hangs at connecting, idk what to do, i've searched the forum, there is a lot of similar threads but none of them helped me, what can i do to play again?

 

Thanks for your reply, uac's off, gameguard process have full control to all users (just in case), game added to antivirus and firewall, i wonder if any port on the modem/router should be opened? (i've changed it a few months after i left the game)

 

Thats the matter, im too far from the modem/router, im using wifi AC, and my OS is windows 7 x64 and panda antivirus with the excluded diablo folder.

--- Double Post Merged, May 13, 2018, Original Post Date: May 12, 2018 ---

I've found this file in the diablo folder (if this helps) err_GameGuard.log with the following in it:
Operating system supported.
Response HTTP/1.1 304.
File './TDAgg/Database.dbx.zip' is updated.
Response HTTP/1.1 304.

 

Ok sorry about double post, ill check tomorrow with a lan cable to see if it works or not, btw there is no router, its just a wifi cablemodem (technicolor dpc3848ve) idk whats the matter then, if the firewall in the modem is disabled.