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Port 3329 (hp-device-disc)

IANA assigns port 3329 to hp-device-disc: HP Device Disc.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
hp-device-disc TCP HP Device Disc Shivaun Albright -
hp-device-disc UDP HP Device Disc Shivaun Albright -

Check what is listening on port 3329

Linux: is anything listening on TCP 3329?
sudo ss -tlnp 'sport = :3329'
Linux: UDP 3329
sudo ss -ulnp 'sport = :3329'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3329
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3329 '
Windows (Command Prompt)
netstat -ano | findstr :3329
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3329 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3329
From Windows
Test-NetConnection HOST -Port 3329
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3329

Block port 3329 in the firewall

ufw
sudo ufw deny 3329/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3329 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3329 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3329' -Direction Inbound -Protocol TCP -LocalPort 3329 -Action Block
ufw
sudo ufw deny 3329/udp
iptables
sudo iptables -A INPUT -p udp --dport 3329 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3329 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3329' -Direction Inbound -Protocol UDP -LocalPort 3329 -Action Block

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3327bbars3328egptlm3330mcs-calypsoicf3331mcs-messaging

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