On 2025/04/23 15:29, Hugo Osvaldo Barrera wrote:
> Port 1883 is used for plain-text mqtt and 8883 is used for TLS+mqtt.
> See: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=mqtt

Many IANA registrations are for both TCP and UDP although nany
protocols never or rarely run over both. We typically only list a
port/protocol if in very common usage.

I agree with adding MQTT over TCP, this is a common protocol and
reserving this port to prevent it being used in the dynamic range, which
is a side-effect of listing in services(5), makes sense.

I think we should skip UDP.


> Please CC me in replies; I am not subscribed to this list.
> 
> -- 
> Hugo

> diff --git etc/services etc/services
> index 0405aa38d42..7f8c6143e9c 100644
> --- etc/services
> +++ etc/services
> @@ -190,6 +190,8 @@ pptp		1723/tcp			# Point-to-Point Tunneling Protocol
>  pptp		1723/udp			# Point-to-Point Tunneling Protocol
>  radius		1812/udp			# radius authentication
>  radacct		1813/udp	radius-acct	# radius accounting
> +mqtt		1883/tcp			# Message Queuing Telemetry Transport Protocol
> +mqtt		1883/udp			# Message Queuing Telemetry Transport Protocol
>  ssdp		1900/tcp			# SSDP
>  ssdp		1900/udp			# SSDP
>  nfsd		2049/udp	nfs		# NFS server
> @@ -275,6 +277,8 @@ afs3-rmtsys	7009/tcp			# AFS remote cache manager service
>  afs3-rmtsys	7009/udp			# AFS remote cache manager service
>  puppet		8140/tcp			# Puppet master service
>  matrix-fed	8448/tcp			# Matrix Federation Protocol
> +secure-mqtt	8883/tcp			# Secure MQTT
> +secure-mqtt	8883/udp			# Secure MQTT
>  ub-dns-control	8953/tcp			# unbound dns nameserver control
>  git		9418/tcp			# git pack transfer service
>  git		9418/udp			# git pack transfer service