Port 3689 (daap)

IANA assigns port 3689 to daap: Digital Audio Access Protocol (iTunes).

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

daap TCP Digital Audio Access Protocol (iTunes)
Defined TXT keys: txtvers, Version, iTSh Version, Machine ID, Database ID, Machine Name, Password Amandeep Jawa -

daap UDP Digital Audio Access Protocol (iTunes)
Defined TXT keys: txtvers, Version, iTSh Version, Machine ID, Database ID, Machine Name, Password Amandeep Jawa -

Registry dates for this port: registered 2003-01.

Check what is listening on port 3689

Linux: is anything listening on TCP 3689?

sudo ss -tlnp 'sport = :3689'

Linux: UDP 3689

sudo ss -ulnp 'sport = :3689'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3689

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3689 '

Windows (Command Prompt)

netstat -ano | findstr :3689

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3689 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 3689

From Windows

Test-NetConnection HOST -Port 3689

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 3689

Block port 3689 in the firewall

ufw

sudo ufw deny 3689/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3689 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3689 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3689' -Direction Inbound -Protocol TCP -LocalPort 3689 -Action Block

ufw

sudo ufw deny 3689/udp