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Port 1517 (vpac)

IANA assigns port 1517 to vpac: Virtual Places Audio control.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vpac TCP Virtual Places Audio control - -
vpac UDP Virtual Places Audio control - -

Check what is listening on port 1517

Linux: is anything listening on TCP 1517?
sudo ss -tlnp 'sport = :1517'
Linux: UDP 1517
sudo ss -ulnp 'sport = :1517'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1517
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1517 '
Windows (Command Prompt)
netstat -ano | findstr :1517
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1517 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1517
From Windows
Test-NetConnection HOST -Port 1517
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1517

Block port 1517 in the firewall

ufw
sudo ufw deny 1517/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1517 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1517 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1517' -Direction Inbound -Protocol TCP -LocalPort 1517 -Action Block
ufw
sudo ufw deny 1517/udp
iptables
sudo iptables -A INPUT -p udp --dport 1517 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1517 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1517' -Direction Inbound -Protocol UDP -LocalPort 1517 -Action Block

Related ports

1515ifor-protocol1516vpad1518vpvd1519vpvc

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