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// Other services

Port 7648: bonjour-cuseeme

Port 7648 is assigned by IANA to cuseeme (bonjour-cuseeme).

7648

How cuseeme works

Other services
client:7648cuseemeresponse client:7648cuseemeresponse

The client sends a request to port 7648 and the cuseeme 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 7648 dangerous?

We have no specific security note for port 7648. 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 7648

ServicePortTransportDescriptionReferenceUpdated
cuseeme 7648 TCP, UDP bonjour-cuseeme - 2006-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 7648, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7648'      # process listening on 7648
sudo lsof -nP -i :7648

macOS

sudo lsof -nP -i :7648

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7648 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7648
netstat -ano | findstr :7648

From another machine

nmap -p 7648 -sV <host>
sudo nmap -sU -p 7648 <host>
nc -zv <host> 7648

Block it in the firewall

sudo ufw deny 7648/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7648" -Direction Inbound -LocalPort 7648 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7648 used for?

Port 7648 is assigned by IANA to cuseeme (bonjour-cuseeme).

Is port 7648 TCP or UDP?

Port 7648 is registered for TCP and UDP.

Is it safe to open port 7648?

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 7648 is open?

On Linux run "ss -ltnup 'sport = :7648'", on macOS "lsof -nP -i :7648", and on Windows "netstat -ano | findstr :7648" to see the local process. From another machine, "nmap -p 7648 <host>" shows whether it is reachable.

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