- 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 3500: RTMP Port
Port 3500 is assigned by IANA to rtmp-port (RTMP Port).
3500
How rtmp-port works
Media & streamingThe device streams video frames over port 3500, 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 3500 dangerous?
We have no specific security note for port 3500. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 3500
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| rtmp-port | 3500 | TCP, UDP | RTMP Port | - | - |
// source: IANA service name and port number registry
Which program uses port 3500, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3500' # process listening on 3500
sudo lsof -nP -i :3500macOS
sudo lsof -nP -i :3500
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3500 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3500 netstat -ano | findstr :3500
From another machine
nmap -p 3500 -sV <host> sudo nmap -sU -p 3500 <host> nc -zv <host> 3500
Block it in the firewall
sudo ufw deny 3500/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3500" -Direction Inbound -LocalPort 3500 -Protocol TCP -Action Block # Windows
What is port 3500 used for?
Port 3500 is assigned by IANA to rtmp-port (RTMP Port).
Is port 3500 TCP or UDP?
Port 3500 is registered for TCP and UDP.
Is it safe to open port 3500?
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 3500 is open?
On Linux run "ss -ltnup 'sport = :3500'", on macOS "lsof -nP -i :3500", and on Windows "netstat -ano | findstr :3500" to see the local process. From another machine, "nmap -p 3500 <host>" shows whether it is reachable.