Setup with unmamaged Router.

[rt_rex]

Hi all
I have bee using Pf for about 3 years with great sucess ,but know i have the oportunity to move to fiber.
In my current setup i have the router bridged(adsl2+) ,so pfsense gets the public IP and its easy as it gets.
But when i move to fiber, but i won't have control over the ISP's router.(no portforward ,nothing).
Every port i whant to forward i have to ask the ISP to do it.
Their router as dhcp enable only thing i know(don´t know if it as UPNP enable)
In this setup i'll have to forward ports on the ISP's router(ask them to do it) and do it in the pfsense.
I this case is there any other setup i can do to forward the ports (nat 1:1,etc) or do you thing its better to forget the ISP's router and buy a unlocked one.