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Port 1839 (netopia-vo1)

IANA assigns port 1839 to netopia-vo1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
netopia-vo1 TCP netopia-vo1 - -
netopia-vo1 UDP netopia-vo1 - -

Check what is listening on port 1839

Linux: is anything listening on TCP 1839?
sudo ss -tlnp 'sport = :1839'
Linux: UDP 1839
sudo ss -ulnp 'sport = :1839'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1839
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1839 '
Windows (Command Prompt)
netstat -ano | findstr :1839
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1839 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1839
From Windows
Test-NetConnection HOST -Port 1839
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1839

Block port 1839 in the firewall

ufw
sudo ufw deny 1839/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1839 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1839 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1839' -Direction Inbound -Protocol TCP -LocalPort 1839 -Action Block
ufw
sudo ufw deny 1839/udp
iptables
sudo iptables -A INPUT -p udp --dport 1839 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1839 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1839' -Direction Inbound -Protocol UDP -LocalPort 1839 -Action Block

Related ports

1837csoft11838talnet1840netopia-vo21841netopia-vo3

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