Did they change the outbound connection ports?

[jwagner]

Previously the documentation said that the client connects out over 9993/UDP and then randomized high numbered UDP ports. But it seems that has changed recently and now the documentation (FAQ | ZeroTier Documentation) States 9993/TCP as the only outbound port needed to connect to ZeroTier services. Is this correct? Was this a recent change?

[l0crian]

What are you looking at in the FAQ specifically? The only mention I see of TCP is mentioning the TCP fallback that occurs if configured. The primary port is still 9993/UDP.

Still doesn’t work?​

Your system firewall is likely blocking communication with the ZeroTier service. Look up instructions for how to unblock an application from the firewall for your OS. ZeroTier will need to be accessible via TCP port 9993 for the UI and CLI to interact with it.

These are the normal UDP ports that will be used:

[0] is the normal/default port, usually 9993|
[1] is a port derived from our ZeroTier address|
[2] is a port computed from the normal/default for use with uPnP/NAT-PMP mappings|

[jwagner]

That section was what I was looking at exactly. I couldn’t find any mention of the UDP ports that I used to find so I was a bit confused. Thanks for clearing that up!