No connection via zerotier possible

[wucke13]

Problem/Motivation

I cant connect to anything from or to the HAOS instance via zerotier

Expected behavior

Connection (i.e. accessing lovelace) is possible

Actual behavior

No connection possible.

• The zerotier interface is present and has the correct IP address
• Ping-ing the local zerotier interface works
• Ping-ing any other IP in the zerotier network doesn't work (no response)
• Other devices can interact just fine through the zerotier network
• ip route get <other device ip> correctly assumes the route has to go through the local zerotier interface
• zerotier cli status from within the zerotier addon container returns ONLINE
• pinging any other device in the zerotier network from within the addons docker container also does not work.

Steps to reproduce

1. Install addon
2. Join the adddon to zerotier network

Proposed changes

(If you have a proposed change, workaround or fix, describe the rationale behind it)

[wucke13]

Another thing came to mind for me: some zerotier devices which are off-site can connect to the HAOS, but not all (i.e. my phone on mobile carrier never gets to access it) and none of the devices in the same local network as the homeassistant VM.

[wucke13]

Further investigation, I think I can rule out a simple connectivity problem:

I have two hosts:

• A Linux on a physical machine, ip: 10.0.0.1
• B HAOS in a VM running inside KVM ontop of A, ip: 10.0.0.2

Observations

Ping works in both directions:

• A: ping 10.0.0.1 :heavy_check_mark:
• A: ping 10.0.0.2 :heavy_check_mark:

UDP connection A -> B works (after initialization by A, data can be sent both ways):

• B: docker exec -it addon_a0d7b954_zerotier nc -ulvp 9994
• A: nc -uv 10.0.0.2 9994

UDP connection B -> A works (after initialization by B, data can be sent both ways):

• A: nc -ulvp 9994
• B: docker exec -it addon_a0d7b954_zerotier nc -uv 10.0.0.1 9994

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