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Port 17220 (avtp)

IANA assigns port 17220 to avtp: IEEE 1722 Transport Protocol for Time Sensitive Applications.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
avtp TCP IEEE 1722 Transport Protocol for Time Sensitive Applications Transport Protocol for Time-Sensitive Networking TG -
avtp UDP IEEE 1722 Transport Protocol for Time Sensitive Applications Transport Protocol for Time-Sensitive Networking TG -

Registry dates for this port: registered 2014-03-07.

Check what is listening on port 17220

Linux: is anything listening on TCP 17220?
sudo ss -tlnp 'sport = :17220'
Linux: UDP 17220
sudo ss -ulnp 'sport = :17220'
Linux / macOS: which process owns the port
sudo lsof -nP -i :17220
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':17220 '
Windows (Command Prompt)
netstat -ano | findstr :17220
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 17220 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 17220
From Windows
Test-NetConnection HOST -Port 17220
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 17220

Block port 17220 in the firewall

ufw
sudo ufw deny 17220/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 17220 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 17220 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 17220' -Direction Inbound -Protocol TCP -LocalPort 17220 -Action Block
ufw
sudo ufw deny 17220/udp
iptables
sudo iptables -A INPUT -p udp --dport 17220 -j DROP
nftables
sudo nft add rule inet filter input udp dport 17220 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 17220' -Direction Inbound -Protocol UDP -LocalPort 17220 -Action Block

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