- 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 383: hp performance data alarm manager
Port 383 is assigned by IANA to hp-alarm-mgr (hp performance data alarm manager).
383
How hp-alarm-mgr works
Other servicesThe client sends a request to port 383 and the hp-alarm-mgr 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 383 dangerous?
We have no specific security note for port 383. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 383
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| hp-alarm-mgr | 383 | TCP, UDP | hp performance data alarm manager | - | - |
// source: IANA service name and port number registry
Which program uses port 383, and is it reachable?
Linux
sudo ss -ltnup 'sport = :383' # process listening on 383
sudo lsof -nP -i :383macOS
sudo lsof -nP -i :383
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 383 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 383 netstat -ano | findstr :383
From another machine
nmap -p 383 -sV <host> sudo nmap -sU -p 383 <host> nc -zv <host> 383
Block it in the firewall
sudo ufw deny 383/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 383" -Direction Inbound -LocalPort 383 -Protocol TCP -Action Block # Windows
What is port 383 used for?
Port 383 is assigned by IANA to hp-alarm-mgr (hp performance data alarm manager).
Is port 383 TCP or UDP?
Port 383 is registered for TCP and UDP.
Is it safe to open port 383?
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 383 is open?
On Linux run "ss -ltnup 'sport = :383'", on macOS "lsof -nP -i :383", and on Windows "netstat -ano | findstr :383" to see the local process. From another machine, "nmap -p 383 <host>" shows whether it is reachable.
Other other services ports
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