Hi, I'm starting this thread to learn and possibly help others find usable workarounds for CGNAT. Two days ago I hadn't heard of CGNAT but the problem became apparent when I went to set up remote viewing for my CCTV DVR security cameras on recently joined Skinny Unlimited VDSL. I'd been using port forwarding and DDNS to facilitate camera surveillance for many years with previous ISP.

Skinny confirmed today their service does not handle port forwarding. It looks like CGNAT will become more prevalent in the near future. Apart from Skinny, Bigpipe and Flip currently use CGNAT. 

Possible workarounds:

Set up a VPS ...apparently an account can be from US $10/yr (Thanks to poster hio77)

remot3.it ....looks really interesting and there's a free account for non commercial (which I am).

portmap.io ....Uses vpn tunnel. Russian based. Free basic account. Wouldn't be my 1st choice.

That's what I've got so far. Any thoughts and comments would be great.