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Port 670 (vacdsm-sws)

IANA assigns port 670 to vacdsm-sws: VACDSM-SWS.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vacdsm-sws TCP VACDSM-SWS - -
vacdsm-sws UDP VACDSM-SWS - -

Check what is listening on port 670

Linux: is anything listening on TCP 670?
sudo ss -tlnp 'sport = :670'
Linux: UDP 670
sudo ss -ulnp 'sport = :670'
Linux / macOS: which process owns the port
sudo lsof -nP -i :670
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':670 '
Windows (Command Prompt)
netstat -ano | findstr :670
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 670 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 670
From Windows
Test-NetConnection HOST -Port 670
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 670

Block port 670 in the firewall

ufw
sudo ufw deny 670/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 670 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 670 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 670' -Direction Inbound -Protocol TCP -LocalPort 670 -Action Block
ufw
sudo ufw deny 670/udp
iptables
sudo iptables -A INPUT -p udp --dport 670 -j DROP
nftables
sudo nft add rule inet filter input udp dport 670 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 670' -Direction Inbound -Protocol UDP -LocalPort 670 -Action Block

Related ports

668mecomm669meregister671vacdsm-app672vpps-qua

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