- 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 5209: Nomad Device Video Transfer
Port 5209 is assigned by IANA to nomad (Nomad Device Video Transfer).
5209
How nomad works
Media & streamingThe device streams video frames over port 5209, continuously, as they are captured.
- 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
- Media & streaming
Is port 5209 dangerous?
We have no specific security note for port 5209. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 5209
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| nomad | 5209 | TCP | Nomad Device Video Transfer | - | 2012-08-20 |
| - | 5209 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 5209, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5209' # process listening on 5209
sudo lsof -nP -i :5209macOS
sudo lsof -nP -i :5209
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5209 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5209 netstat -ano | findstr :5209
From another machine
nmap -p 5209 -sV <host> nc -zv <host> 5209
Block it in the firewall
sudo ufw deny 5209/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5209" -Direction Inbound -LocalPort 5209 -Protocol TCP -Action Block # Windows
What is port 5209 used for?
Port 5209 is assigned by IANA to nomad (Nomad Device Video Transfer).
Is port 5209 TCP or UDP?
Port 5209 is registered for TCP.
Is it safe to open port 5209?
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 5209 is open?
On Linux run "ss -ltnup 'sport = :5209'", on macOS "lsof -nP -i :5209", and on Windows "netstat -ano | findstr :5209" to see the local process. From another machine, "nmap -p 5209 <host>" shows whether it is reachable.