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Port 7680 (ms-do)

IANA assigns port 7680 to ms-do: Microsoft Delivery Optimization Peer-to-Peer.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ms-do TCP Microsoft Delivery Optimization Peer-to-Peer Microsoft Corporation 6 -
ms-do UDP Microsoft Delivery Optimization Peer-to-Peer Microsoft Corporation 6 -

Registry dates for this port: registered 2008-02-27, last modified 2022-05-03.

Check what is listening on port 7680

Linux: is anything listening on TCP 7680?
sudo ss -tlnp 'sport = :7680'
Linux: UDP 7680
sudo ss -ulnp 'sport = :7680'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7680
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7680 '
Windows (Command Prompt)
netstat -ano | findstr :7680
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7680 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7680
From Windows
Test-NetConnection HOST -Port 7680
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7680

Block port 7680 in the firewall

ufw
sudo ufw deny 7680/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7680 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7680 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7680' -Direction Inbound -Protocol TCP -LocalPort 7680 -Action Block
ufw
sudo ufw deny 7680/udp
iptables
sudo iptables -A INPUT -p udp --dport 7680 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7680 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7680' -Direction Inbound -Protocol UDP -LocalPort 7680 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.