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Port 5679 (dccm)

IANA assigns port 5679 to dccm: Direct Cable Connect Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dccm TCP Direct Cable Connect Manager Mark Miller 2 -
dccm UDP Direct Cable Connect Manager Mark Miller 2 -

Check what is listening on port 5679

Linux: is anything listening on TCP 5679?
sudo ss -tlnp 'sport = :5679'
Linux: UDP 5679
sudo ss -ulnp 'sport = :5679'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5679
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5679 '
Windows (Command Prompt)
netstat -ano | findstr :5679
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5679 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5679
From Windows
Test-NetConnection HOST -Port 5679
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5679

Block port 5679 in the firewall

ufw
sudo ufw deny 5679/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5679 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5679 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5679' -Direction Inbound -Protocol TCP -LocalPort 5679 -Action Block
ufw
sudo ufw deny 5679/udp
iptables
sudo iptables -A INPUT -p udp --dport 5679 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5679 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5679' -Direction Inbound -Protocol UDP -LocalPort 5679 -Action Block

Related ports

5677questdb2-lnchr5678rrac5680auriga-router5681ncxcp

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.