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Port 5968 (mppolicy-v5)

IANA assigns port 5968 to mppolicy-v5.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
mppolicy-v5 TCP mppolicy-v5 Yutaka Ono -
mppolicy-v5 UDP mppolicy-v5 Yutaka Ono -

Check what is listening on port 5968

Linux: is anything listening on TCP 5968?
sudo ss -tlnp 'sport = :5968'
Linux: UDP 5968
sudo ss -ulnp 'sport = :5968'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5968
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5968 '
Windows (Command Prompt)
netstat -ano | findstr :5968
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5968 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5968
From Windows
Test-NetConnection HOST -Port 5968
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5968

Block port 5968 in the firewall

ufw
sudo ufw deny 5968/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5968 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5968 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5968' -Direction Inbound -Protocol TCP -LocalPort 5968 -Action Block
ufw
sudo ufw deny 5968/udp
iptables
sudo iptables -A INPUT -p udp --dport 5968 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5968 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5968' -Direction Inbound -Protocol UDP -LocalPort 5968 -Action Block

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