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Port 3492 (tvdumtray-port)

IANA assigns port 3492 to tvdumtray-port: TVDUM Tray Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tvdumtray-port TCP TVDUM Tray Port Peter Boers -
tvdumtray-port UDP TVDUM Tray Port Peter Boers -

Registry dates for this port: registered 2002-05.

Check what is listening on port 3492

Linux: is anything listening on TCP 3492?
sudo ss -tlnp 'sport = :3492'
Linux: UDP 3492
sudo ss -ulnp 'sport = :3492'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3492
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3492 '
Windows (Command Prompt)
netstat -ano | findstr :3492
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3492 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3492
From Windows
Test-NetConnection HOST -Port 3492
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3492

Block port 3492 in the firewall

ufw
sudo ufw deny 3492/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3492 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3492 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3492' -Direction Inbound -Protocol TCP -LocalPort 3492 -Action Block
ufw
sudo ufw deny 3492/udp
iptables
sudo iptables -A INPUT -p udp --dport 3492 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3492 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3492' -Direction Inbound -Protocol UDP -LocalPort 3492 -Action Block

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