Port 5354

mdnsresponder · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicemdnsresponder
Registered2004-06

Frequently asked questions

What is port 5354 used for?

Port 5354 is registered with the IANA for mdnsresponder (TCP/UDP). Description: Multicast DNS Responder IPC.

Is port 5354 a well-known port?

No. Port 5354 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 5354 is open?

Locally on Linux with ss -tulpn | grep ':5354\b', on Windows with netstat -ano | findstr :5354. To test a remote host use Test-NetConnection <host> -Port 5354 in PowerShell or nc -zv <host> 5354 on Linux/macOS.

How do I open port 5354 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 5354/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=5354/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 5354" -Direction Inbound -Protocol TCP -LocalPort 5354 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPmdnsresponderMulticast DNS Responder IPC
UDPmdnsresponderMulticast DNS Responder IPC

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