- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 409: Prospero Resource Manager Node Man.
Port 409 is assigned by IANA to prm-nm (Prospero Resource Manager Node Man.).
409
How prm-nm works
Other servicesThe client sends a request to port 409 and the prm-nm service answers.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Well-known (0-1023)
- Category
- Other services
Is port 409 dangerous?
We have no specific security note for port 409. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 409
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| prm-nm | 409 | TCP, UDP | Prospero Resource Manager Node Man. | - | - |
// source: IANA service name and port number registry
Which program uses port 409, and is it reachable?
Linux
sudo ss -ltnup 'sport = :409' # process listening on 409
sudo lsof -nP -i :409macOS
sudo lsof -nP -i :409
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 409 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 409 netstat -ano | findstr :409
From another machine
nmap -p 409 -sV <host> sudo nmap -sU -p 409 <host> nc -zv <host> 409
Block it in the firewall
sudo ufw deny 409/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 409" -Direction Inbound -LocalPort 409 -Protocol TCP -Action Block # Windows
What is port 409 used for?
Port 409 is assigned by IANA to prm-nm (Prospero Resource Manager Node Man.).
Is port 409 TCP or UDP?
Port 409 is registered for TCP and UDP.
Is it safe to open port 409?
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. Close the port if nothing on the host needs it.
How do I check if port 409 is open?
On Linux run "ss -ltnup 'sport = :409'", on macOS "lsof -nP -i :409", and on Windows "netstat -ano | findstr :409" to see the local process. From another machine, "nmap -p 409 <host>" shows whether it is reachable.
Other other services ports
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