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Port 1809 (oracle-vp1)

IANA assigns port 1809 to oracle-vp1: Oracle-VP1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
oracle-vp1 TCP Oracle-VP1 Craig Fowler -
oracle-vp1 UDP Oracle-VP1 Craig Fowler -

Check what is listening on port 1809

Linux: is anything listening on TCP 1809?
sudo ss -tlnp 'sport = :1809'
Linux: UDP 1809
sudo ss -ulnp 'sport = :1809'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1809
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1809 '
Windows (Command Prompt)
netstat -ano | findstr :1809
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1809 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1809
From Windows
Test-NetConnection HOST -Port 1809
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1809

Block port 1809 in the firewall

ufw
sudo ufw deny 1809/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1809 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1809 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1809' -Direction Inbound -Protocol TCP -LocalPort 1809 -Action Block
ufw
sudo ufw deny 1809/udp
iptables
sudo iptables -A INPUT -p udp --dport 1809 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1809 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1809' -Direction Inbound -Protocol UDP -LocalPort 1809 -Action Block

Related ports

1807fhsp1808oracle-vp21810jerand-lm1811scientia-sdb

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