HTTPfy

Port 1834 (ardusuni)

IANA assigns port 1834 to ardusuni: ARDUS Unicast.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ardusuni TCP ARDUS Unicast - -
ardusuni UDP ARDUS Unicast - -

Check what is listening on port 1834

Linux: is anything listening on TCP 1834?
sudo ss -tlnp 'sport = :1834'
Linux: UDP 1834
sudo ss -ulnp 'sport = :1834'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1834
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1834 '
Windows (Command Prompt)
netstat -ano | findstr :1834
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1834 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1834
From Windows
Test-NetConnection HOST -Port 1834
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1834

Block port 1834 in the firewall

ufw
sudo ufw deny 1834/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1834 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1834 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1834' -Direction Inbound -Protocol TCP -LocalPort 1834 -Action Block
ufw
sudo ufw deny 1834/udp
iptables
sudo iptables -A INPUT -p udp --dport 1834 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1834 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1834' -Direction Inbound -Protocol UDP -LocalPort 1834 -Action Block

Related ports

1832tht-treasure1833udpradio1835ardusmul1836ste-smsc

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