Fucking Optus doesn't provide ipv6 over cell. And starlink has cgnat.

Starlink isn't our infrastructure.

Satellite and Mobile are both pretty bad options for hosting.

Have you looked at tailscale or CloudFlare zerotrust to allow access to your server?

Well I don't want my server hardware somewhere I don't control (kinda half the point of self hosting). That leaves me with the choice of ADSL or starlink (one is multiple orders of magnitude faster with multiple order of magnitude lower ping). I use mobile on my phone to access my services when I'm not at home.

Tailscale is basically just a VPN but it requires an ipv4 introduction point.
- wut? My IP is hella cucked behind cgnat and I use tailscale with no worries

Just ran into my first issue with CGNAT last night when my Minecraft server stopped being contactable after my ISP moved me from a publicly routable IP to one behind CGNAT. I feel you wholeheartedly, imo if I want to host something, there shouldn't be any higher barrier to entry than a simple port forward.

You may want to check your telcos agreement on that.

As far as the Telcos are concerned, we all need to happy little consumers of media.

We aren’t allowed to generate and publish any media of our own.

The Governments agree with them.
- There is a business reason for it with the ever shrinking public ipv4 space available. Universal ipv6 support is a must, but gestures at the OP post.
- Yeah once I figured out what happened I did check the agreement and saw that I was completely at their whim with no recourse (MATE internet if anyone is curious). So at this point I'm shopping around ISPs that allow for a static routable IP, if anyone has any recommendations then let me know. Looking for 250/25 or better when it comes to speed
I believe Minecraft works with ipv6 so u should be able to use that. Assuming u sent on a telco that only gives u a fucking ipv4.

Genuine question:
What does ipv6 give you that ipv4 does not? I genuinely can't tell the difference as an Internet browser. Particularly on the phone.

I self host. Cgnat means my servers ipv4 is not globally accessible hence I'm using ipv6. ipv6 does also reduce network congestion and improve routing efficiency.
- The fact that it improves routing efficiently and that Optus does not support it explains all you need to know about Optus.
- All the noise that happened recently with the 3G shutdown tells us just how many old phones there out there on the cell networks. Running old iOS/Android versions with a gazillion exploits. I think it's a good thing that telcos NAT their customers. The last thing we want is for the Internet to be able to easily connect to those devices.
  
  ipv6 does also reduce network congestion and improve routing efficiency.
  
  Unless you are moving gigabits of data, you won't notice the difference the smaller header payload of ipv6 offers. That's some serious ePenis bragging bullshit I see all the time among nerds who want to say they're on the latest and fastest technology without understanding that while they are correct (uploading/downloading a gigabyte over ipv6 will probably complete a few seconds faster over ipv6 instead of ipv4), they're also making a big deal about nothing.
  
  Your issue is you want to be able to access your home network over mobile infrastructure, while you are paying for a basic phone plan. Optus does offer what you want, but to business customers. Telstra will also permit you to apply a static IP to some of their plans, I managed to do this for a client about 10 years ago. It was just an add-on that Telstra offered. They were on a business plan, but I don't remember whether a business plan was a requirement.
What does ipv6 give you that ipv4 does not?

A public, directly routable IP address which doesn't cost a fortune for the ISPs. In fact, an incomprehensible number of public, directly routable IPs per user such that it's an embarrassment of riches compared to ipv4 (the only important limitations are more down to the number of subnets per user, which is usually still way more than you need at 256 for /56 prefixes).

And it's even better if all devices and networks support it, since you no longer have to rely on n layers of NAT, reducing latency and complexity.
For me, it’s an additional, redundant layer 3 route between my dual stack nodes. I’ve had instances where v4 or v6 paths have broken, and I’ve not noticed until my monitoring systems explicitly notify me.

I’d also like more tools to use MPTCP which would make them more resilient.

You might be able to manually enable IPv6 in Optus' APN.

My Telstra eSIM didn't automatically enable IPv6, when my physical SIM did, but enabling it in the telstra.wap APN fixed it.

Optus ipv6 is still next to non-existent from what I recall, even on home NBN networks. Even TPG/Vodafone are starting to roll it out, although it hasn't reached the MVNOs like Kogan yet.

EDIT: They might be finally rolling out ipv6 on their network going by this whirlpool thread