- 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 32400: Plex multimedia
Port 32400 is assigned by IANA to plex (Plex multimedia).
32400
How plex works
Media & streamingThe device streams video frames over port 32400, 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 32400 dangerous?
We have no specific security note for port 32400. Its risk depends on the program actually listening on it. General advice for media & streaming services:
IANA registry entries for port 32400
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| plex | 32400 | TCP | Plex multimedia | - | 2016-06-02 |
| - | 32400 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 32400, and is it reachable?
Linux
sudo ss -ltnup 'sport = :32400' # process listening on 32400
sudo lsof -nP -i :32400macOS
sudo lsof -nP -i :32400
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 32400 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 32400 netstat -ano | findstr :32400
From another machine
nmap -p 32400 -sV <host> nc -zv <host> 32400
Block it in the firewall
sudo ufw deny 32400/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 32400" -Direction Inbound -LocalPort 32400 -Protocol TCP -Action Block # Windows
What is port 32400 used for?
Port 32400 is assigned by IANA to plex (Plex multimedia).
Is port 32400 TCP or UDP?
Port 32400 is registered for TCP.
Is it safe to open port 32400?
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 32400 is open?
On Linux run "ss -ltnup 'sport = :32400'", on macOS "lsof -nP -i :32400", and on Windows "netstat -ano | findstr :32400" to see the local process. From another machine, "nmap -p 32400 <host>" shows whether it is reachable.