Avahi mDNS allows connecting to the Raspberry Pi and other Avahi-enabled host devices without knowing the host IP address.
/etc/avahi/avahi-daemon.conf puts mDNS on all active interfaces–including WiFi.
Manual config Avahi interfaces
This procedure is NOT typically needed. Find WLAN adapter name by
Also note the
wlan0 IP address for testing if Avahi doesn’t work right away.
/etc/avahi/avahi-daemon.conf to have
or whatever interface desired to have Avahi on.
Verify which interfaces and IPv6/IPv6 Avahi is active on from the Avahi host device:
service avahi-daemon status
Test Raspberry Pi Avahi mDNS: from a Mac, Linux, Windows or Android device try
If that doesn’t work, try using the IP address as found on Avahi host:
Configure firewall for SSH
Be sure to open the Raspberry Pi
ufw firewall port.
Port 22 (or other SSH port assigned in
/etc/ssh/sshd_config on the Raspberry Pi) should be seen in:
If you prefer a Firewall GUI:
apt install gufw
apt install avahi-utils mdns-scan
From your laptop (or Pi if diagnosing)
You should see your device (also try this from your Pi).
Use SSH Public Key Authentication with ED25519 keys. Raspberry Pi is trivial to hack like any other device on any operating system if proper cybersecurity is not used. Why do you care if someone hacks your Pi? The hacker can use the Pi’s relatively powerful CPU & GPU to stage sophisticated attacks on the rest of your network.