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// Other services

Port 1585: intv

Port 1585 is assigned by IANA to intv (intv).

1585

How intv works

Other services
client:1585intvresponse client:1585intvresponse

The client sends a request to port 1585 and the intv 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
Other services
01 Security

Is port 1585 dangerous?

We have no specific security note for port 1585. Its risk depends on the program actually listening on it. General advice for other services services:

  • 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.
02 Registry

IANA registry entries for port 1585

ServicePortTransportDescriptionReferenceUpdated
intv 1585 TCP, UDP intv - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1585, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1585'      # process listening on 1585
sudo lsof -nP -i :1585

macOS

sudo lsof -nP -i :1585

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1585 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1585
netstat -ano | findstr :1585

From another machine

nmap -p 1585 -sV <host>
sudo nmap -sU -p 1585 <host>
nc -zv <host> 1585

Block it in the firewall

sudo ufw deny 1585/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1585" -Direction Inbound -LocalPort 1585 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1585 used for?

Port 1585 is assigned by IANA to intv (intv).

Is port 1585 TCP or UDP?

Port 1585 is registered for TCP and UDP.

Is it safe to open port 1585?

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 1585 is open?

On Linux run "ss -ltnup 'sport = :1585'", on macOS "lsof -nP -i :1585", and on Windows "netstat -ano | findstr :1585" to see the local process. From another machine, "nmap -p 1585 <host>" shows whether it is reachable.

05 Related
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