MQTT traffic is blocked by Nexus 3048?

[Mr. T]

I have a Nexus 3048 switch and two machines connected to it. I can ping both ways and telent both ways between the machines through the switch.

One machine is running an MQTT broker. The other is running an MQTT client. The MQTT protocol is using a tcp socket on port 1883.

The switch is blocking that traffic - how can I enable port 1883 traffic through the switch?

I tried making an ACL with "permit tcp any any eq 1883", but to no effect...

rgds

Geddy

[Masoud Pourshabanian]

Hello,

By default, switch does not block any traffic. Do you have any mechanism such as access-list or inspection configured on your switch? Please share your configuration on switch with specifying interfaces facing those machines

If you do not, check your software on the machines.

Masoud

[Mr. T]

Hi, the configuration is attached below. The machines are connected to port 1 and 48.

When the two machines are connected directly to each other, everything works fine.

I tried to set up an access list called "MQTT". All the other access lists in the configuration came as default with the switch.

rgds

Geddy