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originallyus / node-red-contrib-alexa-local

An easy-to-use NodeRED node for adding Alexa capability to NodeRED. NO Alexa Skills required.
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Discovery not working due to port defined as IPV6 by default in node-red #93

Open chipgoon opened 5 years ago

chipgoon commented 5 years ago

Node-red seems to be opening ports as IPV6 by default. I only use IPV4 in my local network, and thus alexa cannot find the Alexa-local instance.

Running 'netstat -tulpn | grep node-red' on the host: tcp 0 0 127.0.0.1:46836 0.0.0.0: LISTEN 3648/node-red
tcp6 0 0 :::29000 ::: LISTEN 3648/node-red
tcp6 0 0 :::37429 ::: LISTEN 3648/node-red
udp 0 0 192.168.6.62:50538 0.0.0.0: 3648/node-red
udp 0 0 0.0.0.0:1900 0.0.0.0: 3648/node-red
udp 0 0 0.0.0.0:1900 0.0.0.0: 3648/node-red
udp 0 0 0.0.0.0:1900 0.0.0.0: 3648/node-red
udp 0 0 0.0.0.0:1900 0.0.0.0: 3648/node-red
udp 0 0 172.17.0.1:50081 0.0.0.0: 3648/node-red
udp 0 0 172.30.32.1:50116 0.0.0.0: 3648/node-red

Port 37429 is used for alexa discovery in my case (displayed on the GUI), but it is created as IPV6 instead of IPV4.

Background: node-red plugin v3.0.3 for home assistant (node-red v 0.25.0), home assistant v0.92.0 under debian 9.9 stretch host. Have full ipv4 local access to node-red network, open and non-firewalled. Alexa devices are on the same network. Alexa does not discover any new devices, as I have IPv6 networking disabled in my router.

Found some references online about node.js changed behavior to use ipv6 by default. Such as: https://stackoverflow.com/questions/47797322/node-js-server-only-listening-on-ipv6

chipgoon commented 5 years ago

Running node-red-contrib-alexa-local v 0.3.24

chipgoon commented 5 years ago

Well, even though it's strange that the ports are on IPV6 by default, they are getting forwarded to IPV4 in my config (net_ipv6.conf.all.forwarding=1 in /etc/sysctl.conf), that seems to work fine.

After a few hours of investigation and packet monitoring I solved my problem, had to do with SSDP on my wifi network. In my wifi (Unifi) settings, I found an option to 'enable multicast enhancement' (IGMPv3). Once I turned that on, alexa discovered my nodes.

The issue can be closed.

nalinda6963 commented 4 years ago

Well, even though it's strange that the ports are on IPV6 by default, they are getting forwarded to IPV4 in my config (net_ipv6.conf.all.forwarding=1 in /etc/sysctl.conf), that seems to work fine.

After a few hours of investigation and packet monitoring I solved my problem, had to do with SSDP on my wifi network. In my wifi (Unifi) settings, I found an option to 'enable multicast enhancement' (IGMPv3). Once I turned that on, alexa discovered my nodes.

The issue can be closed.

Does this still work for you? I tried net_ipv6 forwarding and multicast but had no luck