Port 5683

coap · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicecoap
ReferenceRFC 8323, RFC 7252
Registered2011-06-13
Modified2013-07-25

Frequently asked questions

What is port 5683 used for?

Port 5683 is registered with the IANA for coap (TCP/UDP). Description: Constrained Application Protocol (CoAP); Constrained Application Protocol.

Is port 5683 a well-known port?

No. Port 5683 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 5683 is open?

Locally on Linux with ss -tulpn | grep ':5683\b', on Windows with netstat -ano | findstr :5683. To test a remote host use Test-NetConnection <host> -Port 5683 in PowerShell or nc -zv <host> 5683 on Linux/macOS.

How do I open port 5683 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 5683/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=5683/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 5683" -Direction Inbound -Protocol TCP -LocalPort 5683 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPcoapConstrained Application Protocol (CoAP)
UDPcoapConstrained Application Protocol

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