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Fix remarks from PR 13291 (#13306)

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Erik Montnemery 2020-05-05 13:41:03 +02:00 committed by GitHub
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source/_integrations/discovery.markdown
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@ -105,28 +105,13 @@ Home Assistant should be on the same network as the devices for mDNS and UPnP di
When running Home Assistant Core in a [Docker container](/docs/installation/docker/) command line option `--net=host` or the compose file equivalent `network_mode: host` must be used to put it on the host's network, otherwise mDNS and UPnP will not work.
If mDNS is still not working:
- make sure there are no firewall rules blocking mDNS traffic. mDNS relies on sending and receiving UDP multicast packets on port 5353.
- mDNS traffic may not be forwarded correctly between the wired and wireless interfaces of a Wi-Fi AP or router
- Make sure there are no firewall rules blocking mDNS traffic. mDNS relies on sending and receiving UDP multicast packets on port 5353.
- mDNS traffic may not be forwarded correctly between the wired and wireless interfaces of a Wi-Fi AP or router.
#### mDNS forwarding
If it's not possible to have Home Assistant and the devices on the same network, mDNS forwarding can be enabled to allow mDNS discovery between networks.
If it's not possible to have Home Assistant and the devices on the same network, mDNS forwarding may allow mDNS discovery between networks.
mDNS forwarding is a configurable option in some routers. It can also be called mDNS reflector or mDNS repeater, depending on the manufacturer.
For a Linux server acting as router, set up avahi-reflector on the server to make mDNS work between the networks:
{% raw %}
```text
# Install the Avahi-daemon
sudo apt-get install avahi-daemon
# Turn on the reflector. Go into /etc/avahi/avahi-daemon.conf and change the reflector section to:
[reflector]
enable-reflector=yes
reflect-ipv=no
# (re)start the Avahi daemon to reload config
sudo service avahi-daemon restart
```
{% endraw %}
mDNS forwarding is a configurable option in some routers. It can also be called mDNS reflector or mDNS repeater, depending on the manufacturer.
### Windows