CyberHunter
Local dataset, no network
// Other services

Port 617: SCO Desktop Administration Server

Port 617 is assigned by IANA to sco-dtmgr (SCO Desktop Administration Server).

617

How sco-dtmgr works

Other services
client:617sco-dtmgrresponse client:617sco-dtmgrresponse

The client sends a request to port 617 and the sco-dtmgr 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
01 Security

Is port 617 dangerous?

We have no specific security note for port 617. 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 617

ServicePortTransportDescriptionReferenceUpdated
sco-dtmgr 617 TCP, UDP SCO Desktop Administration Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 617, and is it reachable?

Linux

sudo ss -ltnup 'sport = :617'      # process listening on 617
sudo lsof -nP -i :617

macOS

sudo lsof -nP -i :617

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 617 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 617
netstat -ano | findstr :617

From another machine

nmap -p 617 -sV <host>
sudo nmap -sU -p 617 <host>
nc -zv <host> 617

Block it in the firewall

sudo ufw deny 617/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 617" -Direction Inbound -LocalPort 617 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 617 used for?

Port 617 is assigned by IANA to sco-dtmgr (SCO Desktop Administration Server).

Is port 617 TCP or UDP?

Port 617 is registered for TCP and UDP.

Is it safe to open port 617?

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 617 is open?

On Linux run "ss -ltnup 'sport = :617'", on macOS "lsof -nP -i :617", and on Windows "netstat -ano | findstr :617" to see the local process. From another machine, "nmap -p 617 <host>" shows whether it is reachable.

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