Avahi can't accessible from my mobile phone

ramazanemre · February 14, 2021, 9:42am

Hi;

I’ve followed these steps for enabling avahi:

My computer’s name is fedora, and I can ping it with ping fedora.local. But, whenever I ping from my mobile phone with termux, it don’t works. Also I tried to start a flask http server with 0.0.0.0:5000 and accessing it in my mobile phone with fedora.local:5000 but it don’t working.

How can I fix this problem?

Edit: Starting flask server on fedora.local:5000 also not working on phone.

vgaetera · February 14, 2021, 10:04am

Prerequisites:

Your phone must support name resolution with mDNS.
You should be connected to the same broadcast domain with the target host.
Firewall on the router must allow intra-zone forwarding.

An alternative method better suited for Fedora 33:

# Configure firewall
sudo firewall-cmd --permanent --add-service=mdns
sudo firewall-cmd --reload

# Configure systemd-resolved
sudo mkdir -p /etc/systemd/resolved.conf.d
sudo tee /etc/systemd/resolved.conf.d/00-custom.conf << EOF > /dev/null
[Resolve]
MulticastDNS=yes
EOF
sudo systemctl restart systemd-resolved.service

# Configure NetworkManager
sudo tee /etc/NetworkManager/conf.d/00-custom.conf << EOF > /dev/null
[connection]
connection.mdns=2
EOF
sudo systemctl restart NetworkManager.service

ramazanemre · February 14, 2021, 9:58am

tee: /etc/systemd/resolved.conf.d/00-custom.conf: No such file or directory

Yes, both 2 device is connected to same network.

How can I learn if so or not?

Oh, my router don’t have settings about firewall. Just there is a enable/disable section like this:

Am I should to disable it?

vgaetera · February 14, 2021, 10:12am

sudo mkdir -p /etc/systemd/resolved.conf.d

Run Wireshark on your PC and filter the mdns traffic.
Then try to ping the pc-name.local from your phone.