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// Network services

Port 1392: Print Manager

Port 1392 is assigned by IANA to iclpv-pm (Print Manager).

1392

How iclpv-pm works

Network services
client:1392iclpv-pmresponse client:1392iclpv-pmresponse

The client sends a request to port 1392 and the iclpv-pm 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
Registered (1024-49151)
Category
Network services
01 Security

Is port 1392 dangerous?

We have no specific security note for port 1392. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 1392

ServicePortTransportDescriptionReferenceUpdated
iclpv-pm 1392 TCP, UDP Print Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1392, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1392'      # process listening on 1392
sudo lsof -nP -i :1392

macOS

sudo lsof -nP -i :1392

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1392 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1392
netstat -ano | findstr :1392

From another machine

nmap -p 1392 -sV <host>
sudo nmap -sU -p 1392 <host>
nc -zv <host> 1392

Block it in the firewall

sudo ufw deny 1392/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1392" -Direction Inbound -LocalPort 1392 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1392 used for?

Port 1392 is assigned by IANA to iclpv-pm (Print Manager).

Is port 1392 TCP or UDP?

Port 1392 is registered for TCP and UDP.

Is it safe to open port 1392?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 1392 is open?

On Linux run "ss -ltnup 'sport = :1392'", on macOS "lsof -nP -i :1392", and on Windows "netstat -ano | findstr :1392" to see the local process. From another machine, "nmap -p 1392 <host>" shows whether it is reachable.

05 Related
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk

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