https://bitnodes.io/what-is-a-bitcoin-node/#reachable-vs-unreachable-nodes
so yeah a TLDR:
- port 8333 open
- bitcoin.conf configured properly for more inbound connections and mempool size if you really want to be a seeder.

```
maxuploadtarget=<MiB per day>
listen=1
maxconnections=<num>
minrelaytxfee=
maxmempool=2000
mempoolexpiry=672
```

Otherwise is just useless virtue signaling or personal nodes, not full nodes.

So, to summarize: Running a "bitcoin-d" node exposed on port 8333 behind a VPN that allows port forwarding to maintain anonymity.

moptosh

Announcing you are running x or y node is just virtue signaling.

All those RPis nodes on umbrel or start9 if they are not real full nodes with open ports and big mempools then are just personal nodes that really do not help in any way the network.

bitcoin

Peter Wuille post about dropping OP_RETURN limit

DarthCoin

Whatever you will do is the same.
Announcing you are running x or y node is just virtue signaling.
All those RPis nodes on umbrel or start9 if they are not real full nodes with open ports and big mempools then are just personal nodes that really do not help in any way the network.
Virtue signaling means 0 impact.