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Port 3679 (newton-dock)

IANA assigns port 3679 to newton-dock: Newton Dock.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
newton-dock TCP Newton Dock Paul Guyot -
newton-dock UDP Newton Dock Paul Guyot -

Registry dates for this port: last modified 2025-01-23.

Check what is listening on port 3679

Linux: is anything listening on TCP 3679?
sudo ss -tlnp 'sport = :3679'
Linux: UDP 3679
sudo ss -ulnp 'sport = :3679'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3679
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3679 '
Windows (Command Prompt)
netstat -ano | findstr :3679
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3679 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3679
From Windows
Test-NetConnection HOST -Port 3679
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3679

Block port 3679 in the firewall

ufw
sudo ufw deny 3679/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3679 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3679 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3679' -Direction Inbound -Protocol TCP -LocalPort 3679 -Action Block
ufw
sudo ufw deny 3679/udp
iptables
sudo iptables -A INPUT -p udp --dport 3679 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3679 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3679' -Direction Inbound -Protocol UDP -LocalPort 3679 -Action Block

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