More an announcement than anything. I just know that I came to CrowdSupport many times to try and find a solution to Forward Ports on my Telstra gateway. As you may have noticed, you can create reserve IP addresses and forward ports on the GUI for the gateway, but that functionality didn't actually do anything for me. I put this down to not having a static public IP or because I was using a cable adaptor and the Gateway was in bridge mode. Regardless of what the problem was, I wasn't able to fix it, but have found a solution through AirVPN. You can forward ports through their solution bypassing router settings. This may be useful for people who already use a VPN or for anyone who is trying to find a cheap solution.
It's ~$85 p.a but you can message their support for a 3 day trial to test the platform and functionality. Hope this helps someone that has been on the months long search I have been on. I also read that you can get a public IP through a business plan for $10 and that this may solve the problem (read somewhere in the forums but I haven't tried it).