mdnsd.service — mdnsd service configuration file

This mDNS-SD implementation was initially developed by Jeremie Miller <jer@jabber.org> in 2003. Much later Joachim Wiberg <troglobit@gmail.com> adopted it for further development and maintenance mdnsd.service at GitHub: https://github.com/troglobit/mdnsd Debian Jan 4 2022 MDNSD.SERVICE(5)

mdnsd needs at least one .service file to actively announce itself. The systems that mdnsd targets usually have an SSH or HTTP/HTTPS service, which can be located by end-users with mDNS-SD. E.g., mdnsd may be embedded in your printer, an access point, an industrial switch, or other headless network connected device. Services are defined one per .service file and only two fields are mandatory: typeTYPE The TYPE can be any service type from /etc/services, prefixed with an underscore. E.g., 'ipp' is port 631/tcp, which gives the type _ipp._tcpportPORT The port is the UDP or TCP port to announce. This can also be found in the file /etc/services. There are also a few optional fields supported, see below for examples: nameSTRING Free form string to describe service. Usually what is presented to end users by discovery agents. txtSTRING Text records are free-form strings that are included in service announcements. Useful for announcing meta data about your service. targetURL URL to announce as canonical for this service. cnameURL A cname is an alias that can be announced for unique service reqords. E.g., if only one HTTP service is available on the LAN it can be reached through the full name, or using the cname alias.

This section has some examples of mDNS service definitions. SSH # mDNS-SD advertisement of SSH service type _ssh._tcp port 22 FTP # mDNS-SD advertisement of FTP service name Troglobit FTP Server type _ftp._tcp port 21 txt server=uftpd txt version=2.6 target ftp.luthien.local HTTP # mDNS-SD advertisement of HTTP service type _http._tcp port 80 txt server=merecat txt version=2.31 cname home.local Printer # mDNS-SD advertisement of foo._printer._tcp.local. type _printer._tcp port 515 IPP # mDNS-SD advertisement of foo._ipp._tcp.local. type _ipp._tcp port 631

/etc/services List of standard service definitions in UNIX

mdnsd.service — mdnsd service configuration file

mquery(1), mdnsd(8)