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Port 9086 (net2display)

IANA assigns port 9086 to net2display: Vesa Net2Display.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
net2display TCP Vesa Net2Display Kenneth B Ocheltree -
net2display UDP Vesa Net2Display Kenneth B Ocheltree -

Registry dates for this port: registered 2008-01-07.

Check what is listening on port 9086

Linux: is anything listening on TCP 9086?
sudo ss -tlnp 'sport = :9086'
Linux: UDP 9086
sudo ss -ulnp 'sport = :9086'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9086
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9086 '
Windows (Command Prompt)
netstat -ano | findstr :9086
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9086 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9086
From Windows
Test-NetConnection HOST -Port 9086
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9086

Block port 9086 in the firewall

ufw
sudo ufw deny 9086/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9086 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9086 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9086' -Direction Inbound -Protocol TCP -LocalPort 9086 -Action Block
ufw
sudo ufw deny 9086/udp
iptables
sudo iptables -A INPUT -p udp --dport 9086 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9086 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9086' -Direction Inbound -Protocol UDP -LocalPort 9086 -Action Block

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