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Port 3287 (directvdata)

IANA assigns port 3287 to directvdata: DIRECTVDATA.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
directvdata TCP DIRECTVDATA Michael Friedman -
directvdata UDP DIRECTVDATA Michael Friedman -

Check what is listening on port 3287

Linux: is anything listening on TCP 3287?
sudo ss -tlnp 'sport = :3287'
Linux: UDP 3287
sudo ss -ulnp 'sport = :3287'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3287
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3287 '
Windows (Command Prompt)
netstat -ano | findstr :3287
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3287 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3287
From Windows
Test-NetConnection HOST -Port 3287
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3287

Block port 3287 in the firewall

ufw
sudo ufw deny 3287/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3287 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3287 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3287' -Direction Inbound -Protocol TCP -LocalPort 3287 -Action Block
ufw
sudo ufw deny 3287/udp
iptables
sudo iptables -A INPUT -p udp --dport 3287 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3287 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3287' -Direction Inbound -Protocol UDP -LocalPort 3287 -Action Block

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