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Update FAQ to speifically mention OpenWrt and pfSense for mDNS (#3091)

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* Update FAQ to speifically mention OpenWrt and pfSense for mDNS

Add specific reference to OpenWrt and pfSense to fix mDNS across subnets so when searching for either term, the FAQ should appear and point the user in the direction of adding the Avahi module and enabling it (plenty of detailed instructions available).

* Update faq.rst

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Co-authored-by: H. Árkosi Róbert <robreg@zsurob.hu>
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Brian Orpin 2023-07-28 19:00:34 +01:00 committed by GitHub
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guides/faq.rst
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@ -361,19 +361,16 @@ And a docker compose file looks like this:
.. _docker-reference-notes:
.. note::
By default ESPHome uses mDNS to show online/offline state in the dashboard view. So for that feature
to work you need to enable host networking mode
By default ESPHome uses mDNS to show online/offline state in the dashboard view. So for that feature to work you need to enable host networking mode.
On MacOS the networking mode ("-net=host" option) doesn't work as expected. You have to use
another way to launch the dashboard with a port mapping option and use alternative to mDNS
to have the online/offline stat (see below)
mDNS might not work if your Home Assistant server and your ESPHome nodes are on different subnets.
If your router supports Avahi, you are able to get mDNS working over different subnets.
If your router supports Avahi (eg. OpenWRT or pfSense), you are able to get mDNS working over different subnets following the steps below:
Just follow the next steps:
1. Enable Avahi on both subnets.
1. Enable Avahi on both subnets (install Avahi modules on OpenWRT or pfSense).
2. Enable UDP traffic from ESPHome node's subnet to 224.0.0.251/32 on port 5353.
Alternatively, you can make esphome use ICMP pings to check the status of the device