34
votes
Accepted
Can not resolve .local domains internal to my office LAN
host and nslookup perform DNS lookups, however most applications use glibc's Name Service Switch to decide how host names are looked up.
Your /etc/nsswitch.conf might enable mDNS, which might cause ...
- 15.8k
24
votes
How to configure systemd-resolved for mdns multicast dns on local network?
Changing the /etc/systemd/resolved.conf is just a part of the work. After your changed it you still need to resolve this puzzle:
Multicast DNS will be enabled on a link only if the per-link and the
...
- 349
13
votes
Can not resolve .local domains internal to my office LAN
The bigger problem here is: it is known DNS domain names ending in .local should not be used when setting up DNS infra-structures.
.local use is reserved for zeroconf/avahi aka bonjour usage, which ...
- 58k
11
votes
Accepted
How to enable mDNS for IPv6 on Ubuntu and Debian?
For enabling IPv6 for mDNS in avahi there is a need to change configurations, both in the client and server side for Linux VMs. The steps are:
1) Configure avahi for IPv6, if it is not already done (...
- 58k
11
votes
Accepted
Ubuntu 20.04: Permanently disable a service start at boot
systemctl disable works most of the time but to be sure, use systemctl mask.
What this does is to link the unit files to /dev/null which effectively causes any start operation or command to fail.
You ...
- 12.3k
10
votes
How to configure systemd-resolved for mdns multicast dns on local network?
I spent a lot of time trying to get system-resolve working persistently after reboot, but couldn't get it to work to great frustration.
The steps I took as per instructions and comments above:
Set ...
- 201
8
votes
Accepted
systemd-resolved as mDNS responder
The capability of using mDNS should be enabled in the /etc/systemd/resolved.conf file, in the [Resolve] section, by setting MulticastDNS=yes. Moreover, it should be enabled in the [Network] section of ...
- 241
8
votes
How to configure systemd-resolved for mdns multicast dns on local network?
In order to enable mDNS on an interface, you need to set the MulticastDNS= option in the [Network] section of the .network file for the interface in the 10.0.0.0/16 network.
This option defaults to ...
- 22.6k
5
votes
Mac OS command to resolve hostnames like "getent" on Linux
(Building on user422009's answer)
Add this to your ~/.bash_profile:
getent() {
[ "$1" == "hosts" ] && shift
for x
do
echo $x $(dscacheutil -q host -a name $x | ...
- 51
5
votes
Multicasting multiple mdns names
An alternative method, self-contained in a single systemd file, was posted in a bug tracking the lack of this feature.
[Unit]
Description=Publish %I as alias for %H.local via mdns
Requires=avahi-...
- 151
5
votes
How to enable mDNS for IPv6 on Ubuntu and Debian?
See http://0pointer.de/lennart/projects/nss-mdns/
In /etc/nsswitch.conf, mdns4_minimal enables mDNS resolution for IPV4 only, and for .local domain and link-local addresses (169.254.. in IPv4) only.
...
- 114k
5
votes
Accepted
Unable to ping mDNS hostname
You need the libnss_mdns_minimal.so library installed (from the "libnss-mdns" package) and configured in /etc/nsswitch.conf so that the system would know to talk to Avahi-daemon for looking ...
- 15.4k
4
votes
Debian 11 failed to resolve .local names
For minimal server install it is enough use combo systemd-networkd + systemd-resolved.
sudo nano /etc/systemd/resolved.conf
Uncomment MulticastDNS=yes
sudo nano /etc/systemd/network/10-lan.network
I ...
- 61
3
votes
Accepted
Why does getent default to .station if no TLD is specified?
getent hosts does what the hosts line of nsswitch.conf tells it to do. The strace indicates it's sending a unicast DNS query to 192.168.0.100.
You have two hostname resolution services that could use ...
- 114k
3
votes
How to configure systemd-resolved for mdns multicast dns on local network?
In addition to MulticastDNS=yes in your .network file, the same setting also needs to be set in resolved.conf. From resolved.conf doc:
Multicast DNS will be enabled on a link only if the per-link ...
- 577
2
votes
How to configure systemd-resolved for mdns multicast dns on local network?
My way of dealing with mDNS (avahi) is this
• sudo apt install ifupdown
• sudo apt install avahi-utils
idea from text in
• cat /etc/network/interfaces
• # ifupdown has been replaced by netplan(5) ...
- 21
2
votes
Debugging mDNS with Avahi across Linux and macOS
For .local domains to work, the mDNS protocol ('multicast DNS') is applied. This protocol is specified in RFC6762. It serves to resolve hostnames without a central DNS server, and it works through ...
- 1,571
2
votes
Accepted
Can't ping server that resolves using avahi-resolve
After running strace getent hosts unaha-closp.local on a machine which worked and the machine that didn't, it turns out the machine that didn't work never accessed avahi at all. I was missing the nss-...
- 154
2
votes
Accepted
How to connect to libvirt VMs by name, instead of IP address
Install libvirt-nss. For Fedora, run dnf install libvirt-nss. (For Debian: apt install libnss-libvirt).
In /etc/nsswitch.conf, you want the hosts: line to include libvirt. There is an example in ...
- 53.5k
2
votes
How do you enable mDNS in Linux?
You missed a step in the answer you linked (emphasis mine):
You need the libnss_mdns_minimal.so library installed (from the "libnss-mdns" package) and configured in /etc/nsswitch.conf [...]
...
- 114k
1
vote
Accepted
Issues with .local domains
"I know from research that .local domains are a considered a very bad idea."*
No, that's not true. IF you were using a FQDN (Fully Qualified Domain Name) e.g. .com, .net, etc. it would be ...
- 3,851
1
vote
mDNS on OpenBSD; resolving names in the ".local" domain using the standard resolver
You could check - https://github.com/openbsd/src/blob/013e174a3726f5dfc8d86cfb0c801d83d8f77ad6/lib/libc/asr/asr.c#L625
OpenBSD supports only 'file' and 'bind' options in the name resolver (resolv.conf)...
1
vote
avahi-resolve works but mdns
I was banging on the same problem with recent Debian kernel (Raspberry Pi OS). After reading through nss-mdns documentation and numerous instructions on the internet, I tried both mdns and ...
- 111
1
vote
Accepted
Change priority of mdns4 hostname resolution
First of all, you can specify the name resolution priority (or rather, order) in /etc/nsswitch.conf.
For example, on a Raspbian 11 (bullseye) Pi, the relevant section of the /etc/nsswitch.conf looks ...
- 2,674
1
vote
Domain names ending with .local not resolved
Update:
I found the following issue: https://github.com/lathiat/nss-mdns/issues/75
My router / ISP provides a SOA for the .local domain. The unicast SOA heuristic prevents from mdns resolving. I added ...
- 51
1
vote
Why does getent default to .station if no TLD is specified?
Due to the unrelated issue, I ended up checking /etc/resolv.conf, which is created by NetworkManager on all the distros I use as clients.
According to @Kusalananda 's suggestion, it seems that the ...
- 43
1
vote
mDNS Services are not reachable in fritzbox network
mDNS uses a local Link Multicast IP Adresse (IPv4: 224.0.0.251, IPv6: ff02::fb, UDP-Port 5353) with TTL fixed to 1, so not to be routed. You need a mDNS proxy annoucing the service and the target IP ...
1
vote
Accepted
MDNS multi-cast DNS and resolv.conf file
A layer 2 network performance optimization/quirk is not supposed to affect resolv.conf. I would bet on some non-idempotent operation on some devops script of yours is adding/added the domain line in ...
- 58k
1
vote
MDNS multi-cast DNS and resolv.conf file
No, bad MDNS packet checksums should not cause multiple domain lines in /etc/resolv.conf nor vice versa.
The message
UDP: bad checksum. From 73.2.33.11:5353 to 82.2.33.1:5353 ulen 69
would indicate ...
- 114k
1
vote
Accepted
SSH is unable to resolve local domain names
For some reason I had the 32-bit version of ssh on my system. Installing the 64-bit version seems to have solved all of my problems.
After looking through the strace of the command I noticed ssh had ...
- 31
Only top scored, non community-wiki answers of a minimum length are eligible