Port 4901
flr-agent and flr_agent · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | flr-agent and flr_agent |
| Registered | 2008-11-19 |
Frequently asked questions
What is port 4901 used for?
Port 4901 is registered with the IANA for flr-agent and flr_agent (TCP/UDP). Description: FileLocator Remote Search Agent IANA assigned this well-formed service name as a replacement for "flr_agent".; FileLocator Remote Search Agent; Reserved.
Is port 4901 a well-known port?
No. Port 4901 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4901 is open?
Locally on Linux with ss -tulpn | grep ':4901\b', on Windows with netstat -ano | findstr :4901. To test a remote host use Test-NetConnection <host> -Port 4901 in PowerShell or nc -zv <host> 4901 on Linux/macOS.
How do I open port 4901 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4901/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4901/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4901" -Direction Inbound -Protocol TCP -LocalPort 4901 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | flr-agent | FileLocator Remote Search Agent IANA assigned this well-formed service name as a replacement for "flr_agent". |
| TCP | flr_agent | FileLocator Remote Search Agent |
| UDP | – | Reserved |