Question 1

What is port 4546 used for?

Accepted Answer

Port 4546 is registered with the IANA for sf-lm (TCP/UDP). Description: SF License Manager (Sentinel).

Question 2

Is port 4546 a well-known port?

Accepted Answer

No. Port 4546 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

Question 3

How do I check whether port 4546 is open?

Accepted Answer

Locally on Linux with ss -tulpn | grep ':4546\b', on Windows with netstat -ano | findstr :4546. To test a remote host use Test-NetConnection -Port 4546 in PowerShell or nc -zv 4546 on Linux/macOS.

Question 4

How do I open port 4546 in the firewall?

Accepted Answer

Ubuntu/Debian (ufw): sudo ufw allow 4546/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4546/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4546" -Direction Inbound -Protocol TCP -LocalPort 4546 -Action Allow.

Range	Registered port (1024–49151)
Protocol	TCP/UDP
Service	`sf-lm`

Port 4546

Frequently asked questions

What is port 4546 used for?

Is port 4546 a well-known port?

How do I check whether port 4546 is open?

How do I open port 4546 in the firewall?

IANA registry entries

Nearby entries

Protocol	Service	Description (IANA)
TCP	`sf-lm`	SF License Manager (Sentinel)
UDP	`sf-lm`	SF License Manager (Sentinel)