Forum Thread: Port Forwarding Behind 2 Routers

I have a TP-link router for which I want to forward ports for Metasploit. I'm behind a router (Mikrotik Router OS v5. 20) which is my isp router. I cannot open ports directly on my router as I'm behind one(Mikrotik router). I don't have the password for admin router (isp router) i tried the default ones too. But didn't get a login. Is there any other way to forward ports. I've tried doing almost everything (firewall, DMZ, etc) but got nothing. Still i get " i cannot see your service at port **. Plz help