CyberHunter
Local dataset, no network
// Other services

Port 5785: 3PAR Inform Remote Copy

Port 5785 is assigned by IANA to 3par-rcopy (3PAR Inform Remote Copy).

5785

How 3par-rcopy works

Other services
client:57853par-rcopyresponse client:57853par-rcopyresponse

The client sends a request to port 5785 and the 3par-rcopy 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 5785 dangerous?

We have no specific security note for port 5785. 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 5785

ServicePortTransportDescriptionReferenceUpdated
3par-rcopy 5785 TCP, UDP 3PAR Inform Remote Copy - 2010-02-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 5785, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5785'      # process listening on 5785
sudo lsof -nP -i :5785

macOS

sudo lsof -nP -i :5785

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5785 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5785
netstat -ano | findstr :5785

From another machine

nmap -p 5785 -sV <host>
sudo nmap -sU -p 5785 <host>
nc -zv <host> 5785

Block it in the firewall

sudo ufw deny 5785/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5785" -Direction Inbound -LocalPort 5785 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5785 used for?

Port 5785 is assigned by IANA to 3par-rcopy (3PAR Inform Remote Copy).

Is port 5785 TCP or UDP?

Port 5785 is registered for TCP and UDP.

Is it safe to open port 5785?

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 5785 is open?

On Linux run "ss -ltnup 'sport = :5785'", on macOS "lsof -nP -i :5785", and on Windows "netstat -ano | findstr :5785" to see the local process. From another machine, "nmap -p 5785 <host>" shows whether it is reachable.

05 Related
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