Weird Remote Access problem

[Seckin]

Hi everyone ,
I have ac68u running merlins latest firmware, everything was fine but for some reason inside services stopped being accessible from outside including vpn server access to security cams , ftp so on .. Why do you think is the reason, i have dyndns service and yes i have tried accessing the aervices by manually typing the ip address.
Thank you , any help will be much appreciated...

 

[Seckin]

SOLVED, it was a double nat problem on the ISP side.Took me a while to convince those guys that it was their fault though..