CyberHunter
Local dataset, no network
// Other services

Port 620: SCO WebServer Manager

Port 620 is assigned by IANA to sco-websrvrmgr (SCO WebServer Manager).

620

How sco-websrvrmgr works

Other services
client:620sco-websrvrmgrresponse client:620sco-websrvrmgrresponse

The client sends a request to port 620 and the sco-websrvrmgr 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 620 dangerous?

We have no specific security note for port 620. 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 620

ServicePortTransportDescriptionReferenceUpdated
sco-websrvrmgr 620 TCP, UDP SCO WebServer Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 620, and is it reachable?

Linux

sudo ss -ltnup 'sport = :620'      # process listening on 620
sudo lsof -nP -i :620

macOS

sudo lsof -nP -i :620

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 620 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 620
netstat -ano | findstr :620

From another machine

nmap -p 620 -sV <host>
sudo nmap -sU -p 620 <host>
nc -zv <host> 620

Block it in the firewall

sudo ufw deny 620/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 620" -Direction Inbound -LocalPort 620 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 620 used for?

Port 620 is assigned by IANA to sco-websrvrmgr (SCO WebServer Manager).

Is port 620 TCP or UDP?

Port 620 is registered for TCP and UDP.

Is it safe to open port 620?

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 620 is open?

On Linux run "ss -ltnup 'sport = :620'", on macOS "lsof -nP -i :620", and on Windows "netstat -ano | findstr :620" to see the local process. From another machine, "nmap -p 620 <host>" shows whether it is reachable.

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