- 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 1790: Narrative Media Streaming Protocol
Port 1790 is assigned by IANA to nmsp (Narrative Media Streaming Protocol).
1790
How nmsp works
Media & streamingThe device streams video frames over port 1790, 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 1790 dangerous?
We have no specific security note for port 1790. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 1790
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| nmsp | 1790 | TCP, UDP | Narrative Media Streaming Protocol | - | - |
// source: IANA service name and port number registry
Which program uses port 1790, and is it reachable?
Linux
sudo ss -ltnup 'sport = :1790' # process listening on 1790
sudo lsof -nP -i :1790macOS
sudo lsof -nP -i :1790
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1790 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 1790 netstat -ano | findstr :1790
From another machine
nmap -p 1790 -sV <host> sudo nmap -sU -p 1790 <host> nc -zv <host> 1790
Block it in the firewall
sudo ufw deny 1790/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 1790" -Direction Inbound -LocalPort 1790 -Protocol TCP -Action Block # Windows
What is port 1790 used for?
Port 1790 is assigned by IANA to nmsp (Narrative Media Streaming Protocol).
Is port 1790 TCP or UDP?
Port 1790 is registered for TCP and UDP.
Is it safe to open port 1790?
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 1790 is open?
On Linux run "ss -ltnup 'sport = :1790'", on macOS "lsof -nP -i :1790", and on Windows "netstat -ano | findstr :1790" to see the local process. From another machine, "nmap -p 1790 <host>" shows whether it is reachable.