- Require authentication on cameras and media servers.
- Keep IP cameras and recorders off the Internet; use a VPN for remote viewing.
- Update device firmware.
Port 1911: Starlight Networks Multimedia Transport Protocol
Port 1911 is assigned by IANA to mtp (Starlight Networks Multimedia Transport Protocol).
1911
How mtp works
Media & streamingThe device streams video frames over port 1911, continuously, as they are captured.
- Transport
- TCP · UDP
- 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
- Media & streaming
Is port 1911 dangerous?
We have no specific security note for port 1911. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 1911
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| mtp | 1911 | TCP, UDP | Starlight Networks Multimedia Transport Protocol | - | - |
// source: IANA service name and port number registry
Which program uses port 1911, and is it reachable?
Linux
sudo ss -ltnup 'sport = :1911' # process listening on 1911
sudo lsof -nP -i :1911macOS
sudo lsof -nP -i :1911
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1911 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 1911 netstat -ano | findstr :1911
From another machine
nmap -p 1911 -sV <host> sudo nmap -sU -p 1911 <host> nc -zv <host> 1911
Block it in the firewall
sudo ufw deny 1911/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 1911" -Direction Inbound -LocalPort 1911 -Protocol TCP -Action Block # Windows
What is port 1911 used for?
Port 1911 is assigned by IANA to mtp (Starlight Networks Multimedia Transport Protocol).
Is port 1911 TCP or UDP?
Port 1911 is registered for TCP and UDP.
Is it safe to open port 1911?
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. Require authentication on cameras and media servers.
How do I check if port 1911 is open?
On Linux run "ss -ltnup 'sport = :1911'", on macOS "lsof -nP -i :1911", and on Windows "netstat -ano | findstr :1911" to see the local process. From another machine, "nmap -p 1911 <host>" shows whether it is reachable.