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// Web

Port 598: SCO Web Server Manager 3

Port 598 is assigned by IANA to sco-websrvrmg3 (SCO Web Server Manager 3).

598

How sco-websrvrmg3 works

Web
browser:598sco-websrvrmg3 browser:598sco-websrvrmg3

A browser sends an HTTP request to port 598 and the sco-websrvrmg3 server sends the page back.

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
Web
01 Security

Is port 598 dangerous?

We have no specific security note for port 598. Its risk depends on the program actually listening on it. General advice for web services:

  • Serve it over HTTPS only and check the HTTP security headers.
  • Keep admin consoles and development servers off the Internet.
  • Patch the application server and remove default credentials and sample apps.
02 Registry

IANA registry entries for port 598

ServicePortTransportDescriptionReferenceUpdated
sco-websrvrmg3 598 TCP, UDP SCO Web Server Manager 3 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 598, and is it reachable?

Linux

sudo ss -ltnup 'sport = :598'      # process listening on 598
sudo lsof -nP -i :598

macOS

sudo lsof -nP -i :598

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 598 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 598
netstat -ano | findstr :598

From another machine

nmap -p 598 -sV <host>
sudo nmap -sU -p 598 <host>
nc -zv <host> 598

Block it in the firewall

sudo ufw deny 598/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 598" -Direction Inbound -LocalPort 598 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 598 used for?

Port 598 is assigned by IANA to sco-websrvrmg3 (SCO Web Server Manager 3).

Is port 598 TCP or UDP?

Port 598 is registered for TCP and UDP.

Is it safe to open port 598?

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. Serve it over HTTPS only and check the HTTP security headers.

How do I check if port 598 is open?

On Linux run "ss -ltnup 'sport = :598'", on macOS "lsof -nP -i :598", and on Windows "netstat -ano | findstr :598" to see the local process. From another machine, "nmap -p 598 <host>" shows whether it is reachable.

05 Related
:443 HTTPS tcp · udp · sctp · low risk :80 HTTP tcp · udp · sctp · moderate risk :8080 HTTP alternate tcp · udp · high risk :8443 HTTPS alternate tcp · udp · moderate risk :3000 Dev servers / Grafana tcp · udp · moderate risk :5000 Flask / Docker registry / UPnP tcp · udp · moderate risk :8000 HTTP alternate (dev) tcp · udp · moderate risk :8888 Jupyter / HTTP alternate tcp · udp · high risk

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