- 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 4804: AJA ntv4 Video System Discovery
Port 4804 is assigned by IANA to aja-ntv4-disc (AJA ntv4 Video System Discovery).
4804
How aja-ntv4-disc works
Media & streamingThe device streams video frames over port 4804, continuously, as they are captured.
- Transport
- 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 4804 dangerous?
We have no specific security note for port 4804. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 4804
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| aja-ntv4-disc | 4804 | UDP | AJA ntv4 Video System Discovery | - | 2010-06-03 |
| - | 4804 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 4804, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4804' # process listening on 4804
sudo lsof -nP -i :4804macOS
sudo lsof -nP -i :4804
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4804 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4804 netstat -ano | findstr :4804
From another machine
nmap -p 4804 -sV <host> sudo nmap -sU -p 4804 <host> nc -zv <host> 4804
Block it in the firewall
sudo ufw deny 4804/udp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4804" -Direction Inbound -LocalPort 4804 -Protocol UDP -Action Block # Windows
What is port 4804 used for?
Port 4804 is assigned by IANA to aja-ntv4-disc (AJA ntv4 Video System Discovery).
Is port 4804 TCP or UDP?
Port 4804 is registered for UDP.
Is it safe to open port 4804?
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 4804 is open?
On Linux run "ss -ltnup 'sport = :4804'", on macOS "lsof -nP -i :4804", and on Windows "netstat -ano | findstr :4804" to see the local process. From another machine, "nmap -p 4804 <host>" shows whether it is reachable.