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Port 6966 (swispol)

IANA assigns port 6966 to swispol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
swispol TCP swispol Yutaka Ono -
swispol UDP swispol Yutaka Ono -

Check what is listening on port 6966

Linux: is anything listening on TCP 6966?
sudo ss -tlnp 'sport = :6966'
Linux: UDP 6966
sudo ss -ulnp 'sport = :6966'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6966
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6966 '
Windows (Command Prompt)
netstat -ano | findstr :6966
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6966 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6966
From Windows
Test-NetConnection HOST -Port 6966
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6966

Block port 6966 in the firewall

ufw
sudo ufw deny 6966/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6966 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6966 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6966' -Direction Inbound -Protocol TCP -LocalPort 6966 -Action Block
ufw
sudo ufw deny 6966/udp
iptables
sudo iptables -A INPUT -p udp --dport 6966 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6966 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6966' -Direction Inbound -Protocol UDP -LocalPort 6966 -Action Block

Related ports

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