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// Web

Port 1128: SAPHostControl over SOAP/HTTP

Port 1128 is assigned by IANA to saphostctrl (SAPHostControl over SOAP/HTTP).

1128

How saphostctrl works

Web
browser:1128saphostctrl browser:1128saphostctrl

A browser sends an HTTP request to port 1128 and the saphostctrl 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
Registered (1024-49151)
Category
Web
01 Security

Is port 1128 dangerous?

We have no specific security note for port 1128. 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 1128

ServicePortTransportDescriptionReferenceUpdated
saphostctrl 1128 TCP, UDP SAPHostControl over SOAP/HTTP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1128, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1128'      # process listening on 1128
sudo lsof -nP -i :1128

macOS

sudo lsof -nP -i :1128

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1128 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1128
netstat -ano | findstr :1128

From another machine

nmap -p 1128 -sV <host>
sudo nmap -sU -p 1128 <host>
nc -zv <host> 1128

Block it in the firewall

sudo ufw deny 1128/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1128" -Direction Inbound -LocalPort 1128 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1128 used for?

Port 1128 is assigned by IANA to saphostctrl (SAPHostControl over SOAP/HTTP).

Is port 1128 TCP or UDP?

Port 1128 is registered for TCP and UDP.

Is it safe to open port 1128?

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 1128 is open?

On Linux run "ss -ltnup 'sport = :1128'", on macOS "lsof -nP -i :1128", and on Windows "netstat -ano | findstr :1128" to see the local process. From another machine, "nmap -p 1128 <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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