mDNS defaults in Bluefin

[karypid]

Hello,

I just realized today that mDNS resolution was not enabled on my Bluefin-DX. I enabled it (quite easy) by:

> firewall-cmd --permanent --add-service=mdns
> firewall-cmd --reload

# create file:
> cat /etc/systemd/resolved.conf.d/mdns.conf 
[Resolve]
MulticastDNS=yes

> systemctl restart systemd-resolved

I am wondering if this is intentional or I did something to disable it. I'd expect that from an ease of use perspective it would be nice if this was on by default?

[jiesou]

I haven't configured /etc/systemd/resolved.conf.d/mdns.conf but mDNS seems to work for me OOTB

~ 
❯ systemctl status avahi-daemon
● avahi-daemon.service - Avahi mDNS/DNS-SD Stack
     Loaded: loaded (/usr/lib/systemd/system/avahi-daemon.service; enabled; preset: enabled)
    Drop-In: /usr/lib/systemd/system/service.d
             └─10-timeout-abort.conf
     Active: active (running) since Wed 2026-06-03 07:32:57 CST; 6 days ago
 Invocation: 4185465588ae4a6ab69566eed2300ef7
TriggeredBy: ● avahi-daemon.socket
   Main PID: 1592 (avahi-daemon)
     Status: "avahi-daemon 0.8 starting up."
      Tasks: 2 (limit: 18772)
     Memory: 840K (peak: 1.9M, swap: 464K, swap peak: 484K)
        CPU: 5.900s
     CGroup: /system.slice/avahi-daemon.service
             ├─1592 "avahi-daemon: running [chenpc.local]"
             └─1713 "avahi-daemon: chroot helper"

6月 08 15:06:03 chenpc.lan avahi-daemon[1592]: Registering new address record for fe80::7d0e:7517:3187:465d on enp9s0.*.
6月 08 15:06:03 chenpc.lan avahi-daemon[1592]: Joining mDNS multicast group on interface enp9s0.IPv4 with address 192.168.11.192.
[...]

~ 
❯ avahi-browse --all --ignore-local --resolve --terminate
+ enp9s0 IPv4 esp8266-81a518                                _arduino._tcp        local
= enp9s0 IPv4 esp8266-81a518                                _arduino._tcp        local
   hostname = [esp8266-81a518.local]
   address = [192.168.11.120]
   port = [8266]
   txt = ["tcp_check=no" "ssh_upload=no" "board=d1" "auth_upload=no"]

~ 
❯ ping esp8266-81a518.local
PING esp8266-81a518.local (192.168.11.120) 56(84) 字节的数据。
64 字节，来自 BatteryAngle-81a518.lan (192.168.11.120): icmp_seq=1 ttl=255 时间=79.9 毫秒
64 字节，来自 BatteryAngle-81a518.lan (192.168.11.120): icmp_seq=2 ttl=255 时间=1.91 毫秒
^C
--- esp8266-81a518.local ping 统计 ---
已发送 2 个包， 已接收 2 个包, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 1.914/40.914/79.914/39.000 ms