CyberHunter
Local dataset, no network
// Other services

Port 7887: Universal Broker

Port 7887 is assigned by IANA to ubroker (Universal Broker).

7887

How ubroker works

Other services
client:7887ubrokerresponse client:7887ubrokerresponse

The client sends a request to port 7887 and the ubroker 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 7887 dangerous?

We have no specific security note for port 7887. 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 7887

ServicePortTransportDescriptionReferenceUpdated
ubroker 7887 TCP, UDP Universal Broker - 2005-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 7887, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7887'      # process listening on 7887
sudo lsof -nP -i :7887

macOS

sudo lsof -nP -i :7887

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7887 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7887
netstat -ano | findstr :7887

From another machine

nmap -p 7887 -sV <host>
sudo nmap -sU -p 7887 <host>
nc -zv <host> 7887

Block it in the firewall

sudo ufw deny 7887/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7887" -Direction Inbound -LocalPort 7887 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7887 used for?

Port 7887 is assigned by IANA to ubroker (Universal Broker).

Is port 7887 TCP or UDP?

Port 7887 is registered for TCP and UDP.

Is it safe to open port 7887?

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 7887 is open?

On Linux run "ss -ltnup 'sport = :7887'", on macOS "lsof -nP -i :7887", and on Windows "netstat -ano | findstr :7887" to see the local process. From another machine, "nmap -p 7887 <host>" shows whether it is reachable.

05 Related
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