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// Other services

Port 7913: QuickObjects secure port

Port 7913 is assigned by IANA to qo-secure (QuickObjects secure port).

7913

How qo-secure works

Other services
client:7913qo-secureresponse client:7913qo-secureresponse

The client sends a request to port 7913 and the qo-secure 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 7913 dangerous?

We have no specific security note for port 7913. 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 7913

ServicePortTransportDescriptionReferenceUpdated
qo-secure 7913 TCP, UDP QuickObjects secure port - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7913, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7913'      # process listening on 7913
sudo lsof -nP -i :7913

macOS

sudo lsof -nP -i :7913

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7913 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7913
netstat -ano | findstr :7913

From another machine

nmap -p 7913 -sV <host>
sudo nmap -sU -p 7913 <host>
nc -zv <host> 7913

Block it in the firewall

sudo ufw deny 7913/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7913" -Direction Inbound -LocalPort 7913 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7913 used for?

Port 7913 is assigned by IANA to qo-secure (QuickObjects secure port).

Is port 7913 TCP or UDP?

Port 7913 is registered for TCP and UDP.

Is it safe to open port 7913?

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 7913 is open?

On Linux run "ss -ltnup 'sport = :7913'", on macOS "lsof -nP -i :7913", and on Windows "netstat -ano | findstr :7913" to see the local process. From another machine, "nmap -p 7913 <host>" shows whether it is reachable.

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