TCP Port 1883 – mqtt

About TCP Port 1883

Port 1883 carries the IANA assignment for mqtt. The IANA description reads: ‘Message Queuing Telemetry Transport Protocol’. This port appears in 1 IDS rule and does not have notable malware activity indicators in our data.

IDS Rule References

1 IDS / security rule reference TCP port 1883. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 1): web-application-attack (1).

Sample rule descriptions for TCP port 1883:

• ET EXPLOIT Totolink MQTT ckeckKeepAlive ipAddr Parameter Command Injection Attempt (CVE-2025-7952)

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry and Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range).