- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 4913: LUTher Control Protocol
Port 4913 is assigned by IANA to lutcp (LUTher Control Protocol).
4913
How lutcp works
Other servicesThe client sends a request to port 4913 and the lutcp service answers.
- Transport
- TCP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Other services
Is port 4913 dangerous?
We have no specific security note for port 4913. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 4913
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| lutcp | 4913 | TCP | LUTher Control Protocol | - | 2007-07-03 |
// source: IANA service name and port number registry
Which program uses port 4913, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4913' # process listening on 4913
sudo lsof -nP -i :4913macOS
sudo lsof -nP -i :4913
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4913 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4913 netstat -ano | findstr :4913
From another machine
nmap -p 4913 -sV <host> nc -zv <host> 4913
Block it in the firewall
sudo ufw deny 4913/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4913" -Direction Inbound -LocalPort 4913 -Protocol TCP -Action Block # Windows
What is port 4913 used for?
Port 4913 is assigned by IANA to lutcp (LUTher Control Protocol).
Is port 4913 TCP or UDP?
Port 4913 is registered for TCP.
Is it safe to open port 4913?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.
How do I check if port 4913 is open?
On Linux run "ss -ltnup 'sport = :4913'", on macOS "lsof -nP -i :4913", and on Windows "netstat -ano | findstr :4913" to see the local process. From another machine, "nmap -p 4913 <host>" shows whether it is reachable.
Other other services ports
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