- 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 4752: Simple Network Audio Protocol
Port 4752 is assigned by IANA to snap (Simple Network Audio Protocol).
4752
How snap works
Media & streamingThe device streams video frames over port 4752, 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 4752 dangerous?
We have no specific security note for port 4752. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 4752
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| snap | 4752 | TCP, UDP | Simple Network Audio Protocol | - | 2002-02 |
// source: IANA service name and port number registry
Which program uses port 4752, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4752' # process listening on 4752
sudo lsof -nP -i :4752macOS
sudo lsof -nP -i :4752
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4752 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4752 netstat -ano | findstr :4752
From another machine
nmap -p 4752 -sV <host> sudo nmap -sU -p 4752 <host> nc -zv <host> 4752
Block it in the firewall
sudo ufw deny 4752/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4752" -Direction Inbound -LocalPort 4752 -Protocol TCP -Action Block # Windows
What is port 4752 used for?
Port 4752 is assigned by IANA to snap (Simple Network Audio Protocol).
Is port 4752 TCP or UDP?
Port 4752 is registered for TCP and UDP.
Is it safe to open port 4752?
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 4752 is open?
On Linux run "ss -ltnup 'sport = :4752'", on macOS "lsof -nP -i :4752", and on Windows "netstat -ano | findstr :4752" to see the local process. From another machine, "nmap -p 4752 <host>" shows whether it is reachable.