- 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 2804: March Networks Digital Video Recorders and Enterprise Service Manager products
Port 2804 is assigned by IANA to dvr-esm (March Networks Digital Video Recorders and Enterprise Service Manager products).
2804
How dvr-esm works
Media & streamingThe device streams video frames over port 2804, 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 2804 dangerous?
We have no specific security note for port 2804. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 2804
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| dvr-esm | 2804 | TCP, UDP | March Networks Digital Video Recorders and Enterprise Service Manager products | - | 2004-06 |
// source: IANA service name and port number registry
Which program uses port 2804, and is it reachable?
Linux
sudo ss -ltnup 'sport = :2804' # process listening on 2804
sudo lsof -nP -i :2804macOS
sudo lsof -nP -i :2804
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2804 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 2804 netstat -ano | findstr :2804
From another machine
nmap -p 2804 -sV <host> sudo nmap -sU -p 2804 <host> nc -zv <host> 2804
Block it in the firewall
sudo ufw deny 2804/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 2804" -Direction Inbound -LocalPort 2804 -Protocol TCP -Action Block # Windows
What is port 2804 used for?
Port 2804 is assigned by IANA to dvr-esm (March Networks Digital Video Recorders and Enterprise Service Manager products).
Is port 2804 TCP or UDP?
Port 2804 is registered for TCP and UDP.
Is it safe to open port 2804?
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 2804 is open?
On Linux run "ss -ltnup 'sport = :2804'", on macOS "lsof -nP -i :2804", and on Windows "netstat -ano | findstr :2804" to see the local process. From another machine, "nmap -p 2804 <host>" shows whether it is reachable.