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// Other services

Port 7680: Microsoft Delivery Optimization Peer-to-Peer

Port 7680 is assigned by IANA to ms-do (Microsoft Delivery Optimization Peer-to-Peer).

7680

How ms-do works

Other services
client:7680ms-doresponse client:7680ms-doresponse

The client sends a request to port 7680 and the ms-do 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 7680 dangerous?

We have no specific security note for port 7680. 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 7680

ServicePortTransportDescriptionReferenceUpdated
ms-do 7680 TCP, UDP Microsoft Delivery Optimization Peer-to-Peer - 2022-05-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 7680, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7680'      # process listening on 7680
sudo lsof -nP -i :7680

macOS

sudo lsof -nP -i :7680

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7680 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7680
netstat -ano | findstr :7680

From another machine

nmap -p 7680 -sV <host>
sudo nmap -sU -p 7680 <host>
nc -zv <host> 7680

Block it in the firewall

sudo ufw deny 7680/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7680" -Direction Inbound -LocalPort 7680 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7680 used for?

Port 7680 is assigned by IANA to ms-do (Microsoft Delivery Optimization Peer-to-Peer).

Is port 7680 TCP or UDP?

Port 7680 is registered for TCP and UDP.

Is it safe to open port 7680?

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 7680 is open?

On Linux run "ss -ltnup 'sport = :7680'", on macOS "lsof -nP -i :7680", and on Windows "netstat -ano | findstr :7680" to see the local process. From another machine, "nmap -p 7680 <host>" shows whether it is reachable.

05 Related
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