avahi-browse -a does not show any results
avahi-daemon running on a Debian 9.1 server; however,
avahi-browse -a does not display any services in my home network, consisting of a single
I can access all clients (tested with
ping and, where applicable,
server# tcpdump port 5353
gives quite a bit of output from my clients, e.g.,
15:30:07.206879 IP Client-OSX.fritz.box.mdns > 22.214.171.124.mdns: 0 [20a] [9q] PTR (QM)? _services._dns-sd._udp.local. PTR (QM)? _http._tcp.local. PTR (QM)? _ipp._tcp.local. PTR (QM)? _pdl-datastream._tcp.local. PTR (QM)? _printer._tcp.local. PTR (QM)? _scanner._tcp.local. PTR (QM)? _privet._tcp.local. PTR (QM)? _http-alt._tcp.local. PTR (QM)? _ssh._tcp.local. (847)
However, my clients do not see my server nor the other way around, but the clients see each other’s services, e.g.,
client1# avahi-browse -a + enp0s25 IPv6 client2 SSH Remote Terminal local + enp0s25 IPv4 my-printer _privet._tcp local ...
[server] host-name=alexandria #domain-name=local browse-domains=fritz.box use-ipv4=yes use-ipv6=yes allow-interfaces=eno1 eno2 # deny-interfaces=eth1 # check-response-ttl=no # use-iff-running=no enable-dbus=yes # disallow-other-stacks=no allow-point-to-point=yes # cache-entries-max=4096 # clients-max=4096 # objects-per-client-max=1024 # entries-per-entry-group-max=32 ratelimit-interval-usec=1000000 ratelimit-burst=1000 [wide-area] enable-wide-area=yes [publish] disable-publishing=no #disable-user-service-publishing=no #add-service-cookie=no publish-addresses=yes publish-hinfo=no publish-workstation=no publish-domain=yes #publish-dns-servers=192.168.50.1, 192.168.50.2 publish-resolv-conf-dns-servers=yes publish-aaaa-on-ipv4=yes #publish-a-on-ipv6=no [reflector] enable-reflector=yes #reflect-ipv=no [rlimits] #rlimit-as= rlimit-core=0 rlimit-data=4194304 rlimit-fsize=0 rlimit-nofile=768 rlimit-stack=4194304 rlimit-nproc=3
Clients run Kubuntu 16.04 and macOS.
What am I missing?
avahi-browse requires the
libnss-mdns package and the
/etc/nsswitch.conf must have in its
hosts: line two entries
mdns mdns4 appended, i.e.
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 mdns
I also added multicast to the interface by first installing
net-tools to get
ifconfig and then running
server$ ifconfig eth0 allmulti
In order to make your server visible tu Ubuntu clients, in the debian avahi daemon config file, change
After months of this not working on my laptop, I realised the issue was iptables… (In my case, had to check
Because I connect it to conference and other public networks sometimes, having firewall rules seemed sensible. But if those block 5353/udp packets, then yeah mDNS isn’t going to work when I’m at home.
No clue whether this was your problem 4-5y ago, but … this result shows up high in "avahi sees no hosts". Hopefully my comment is going to help someone some day.
On Rocky Linux 9 (RHEL, CentOS) avahi-browse didn’t show anything for me because by default mdns is not allowed by firewall for the zone "public" which is assigned to any wireless connection.
I had to reassign my wi-fi to firewall zone "home" by running:
sudo firewall-cmd --zone=home --change-interface=wlp8s0f3u4
where "wlp8s0f3u4" is my wi-fi interface name. You can get it from
It should have a name starting with "wl"