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Port 3334 (directv-web)

IANA assigns port 3334 to directv-web: Direct TV Webcasting.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
directv-web TCP Direct TV Webcasting - -
directv-web UDP Direct TV Webcasting - -

Check what is listening on port 3334

Linux: is anything listening on TCP 3334?
sudo ss -tlnp 'sport = :3334'
Linux: UDP 3334
sudo ss -ulnp 'sport = :3334'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3334
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3334 '
Windows (Command Prompt)
netstat -ano | findstr :3334
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3334 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3334
From Windows
Test-NetConnection HOST -Port 3334
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3334

Block port 3334 in the firewall

ufw
sudo ufw deny 3334/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3334 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3334 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3334' -Direction Inbound -Protocol TCP -LocalPort 3334 -Action Block
ufw
sudo ufw deny 3334/udp
iptables
sudo iptables -A INPUT -p udp --dport 3334 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3334 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3334' -Direction Inbound -Protocol UDP -LocalPort 3334 -Action Block

Related ports

3332mcs-mailsvr3333dec-notes3335directv-soft3336directv-tick

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