Glad you are getting closer to a solution. Your DSL / Router seems to be both a modem and router combined. There is typically a way to disable the router function of these. Sometimes labeled as "passthrough mode". Alternatively you could get a compatible DSL modem that doesn't have any router ...

Sorry for the slow responses, between work and other activities I haven't been able to tinker around with this as frequently as I would like.

Wait, you have 2 routers?

Yes, an ISP provided Fritz!box 7530 with an "exposed host" connected to a Protectli machine running PFSense.


You will need ...

Well, still no dice. I wondered if it may be something with docker, so I've eliminated that from the scenario and installed straight onto my linux server. I went through, deleted all my NAT configs and associated FW rules and have rebuilt them, but am still running into the same behavior ...

Interesting, thanks so much for posting those! I'll have to tinker a bit with my Outbound NAT rule as I see some differences in my rules. I'll report back when I get off work and have done some testing.

Hello all!

I'm a bit lost and am experiencing some odd behaviors with the ports on my headless server. In short: I'm expecting to be running my server on default port 34197 but Factorio pingpong servers say I'm hosting on 57021.

For context, I'm using DDNS on my ISPs router which has a port set up ...