Private reachability for Public node

[b00f]

Reachability is not consistent information, and for some unknown reason, some public nodes with public IPs are shown as private [Example here].
Any idea why this happens? Probably, this may have some effects on other modules, which I believe should be taken care of.

[sukunrt]

The node may be behind a firewall. Is it possible to enable prometheus metrics?
https://github.com/libp2p/go-libp2p/tree/master/dashboards

[b00f]

The node may be behind a firewall.

Yes, we do have a firewall for security reasons, but we have enabled all the ports we are aware of.
Is there any specific port for this purpose that is not configurable by users?

Is it possible to enable Prometheus metrics?

Sure, I just enabled it, and I believe this is what you're looking for: Prometheus Metrics.

[sukunrt]

You need to open the port that the node is listening on. From the metrics, I see a lot of your requested dailbacks errored. I also see that in the last few hours, the node has not made any dial back requests, which is very strange because I see some peers in swarm. Maybe none of them support autonat protocol?
For further debugging you can enable autonat logs and see if there's anything suspicious there. That would be env GOLOG_LOG_LEVEL="autonat=debug"

If you're confident that the node is private, you can use https://github.com/libp2p/go-libp2p/blob/master/options.go#L349 ForceReachabilityPublic option.

[b00f]

Thanks for time to check and identify the issue.

Please consider these is not a test network and we can't easily make any changes for debugged purpose.
We update the nodes on official release. We try to add some logs to get more information in the next release.

[b00f]

You need to open the port that the node is listening on.

Which port?

[b00f]

Maybe none of them support autonat protocol?

Probably we have at least 6 (The nodes we have configured)

[2color]

You need to open the port that the node is listening on.

Which port?

The port is determined based on how you configure the libp2p host.

For example, this is how you listen on port 9000

go-libp2p/examples/libp2p-host/host.go

Lines 60 to 63 in 4e85c96

	libp2p.ListenAddrStrings(
	"/ip4/0.0.0.0/tcp/9000", // regular tcp connections
	"/ip4/0.0.0.0/udp/9000/quic-v1", // a UDP endpoint for the QUIC transport
	),