CyberHunter
Local dataset, no network
// Other services

Port 7789: Office Tools Pro Receive

Port 7789 is assigned by IANA to office-tools (Office Tools Pro Receive).

7789

How office-tools works

Other services
client:7789office-toolsresponse client:7789office-toolsresponse

The client sends a request to port 7789 and the office-tools 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 7789 dangerous?

We have no specific security note for port 7789. 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 7789

ServicePortTransportDescriptionReferenceUpdated
office-tools 7789 TCP, UDP Office Tools Pro Receive
Reported: Known Unauthorized Use on port 7789
 - 2006-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 7789, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7789'      # process listening on 7789
sudo lsof -nP -i :7789

macOS

sudo lsof -nP -i :7789

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7789 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7789
netstat -ano | findstr :7789

From another machine

nmap -p 7789 -sV <host>
sudo nmap -sU -p 7789 <host>
nc -zv <host> 7789

Block it in the firewall

sudo ufw deny 7789/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7789" -Direction Inbound -LocalPort 7789 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7789 used for?

Port 7789 is assigned by IANA to office-tools (Office Tools Pro Receive).

Is port 7789 TCP or UDP?

Port 7789 is registered for TCP and UDP.

Is it safe to open port 7789?

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 7789 is open?

On Linux run "ss -ltnup 'sport = :7789'", on macOS "lsof -nP -i :7789", and on Windows "netstat -ano | findstr :7789" to see the local process. From another machine, "nmap -p 7789 <host>" shows whether it is reachable.

05 Related
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