- 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 4392: American Printware RXServer Protocol
Port 4392 is assigned by IANA to apwi-rxserver (American Printware RXServer Protocol).
4392
How apwi-rxserver works
Other servicesThe client sends a request to port 4392 and the apwi-rxserver service answers.
- 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
- Other services
Is port 4392 dangerous?
We have no specific security note for port 4392. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 4392
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| apwi-rxserver | 4392 | TCP | American Printware RXServer Protocol | - | 2009-02-12 |
| - | 4392 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 4392, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4392' # process listening on 4392
sudo lsof -nP -i :4392macOS
sudo lsof -nP -i :4392
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4392 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4392 netstat -ano | findstr :4392
From another machine
nmap -p 4392 -sV <host> nc -zv <host> 4392
Block it in the firewall
sudo ufw deny 4392/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4392" -Direction Inbound -LocalPort 4392 -Protocol TCP -Action Block # Windows
What is port 4392 used for?
Port 4392 is assigned by IANA to apwi-rxserver (American Printware RXServer Protocol).
Is port 4392 TCP or UDP?
Port 4392 is registered for TCP.
Is it safe to open port 4392?
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 4392 is open?
On Linux run "ss -ltnup 'sport = :4392'", on macOS "lsof -nP -i :4392", and on Windows "netstat -ano | findstr :4392" to see the local process. From another machine, "nmap -p 4392 <host>" shows whether it is reachable.
Other other services ports
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