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Port 1814 (tdp-suite)

IANA assigns port 1814 to tdp-suite: TDP Suite.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tdp-suite TCP TDP Suite Rob Lockhart -
tdp-suite UDP TDP Suite Rob Lockhart -

Check what is listening on port 1814

Linux: is anything listening on TCP 1814?
sudo ss -tlnp 'sport = :1814'
Linux: UDP 1814
sudo ss -ulnp 'sport = :1814'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1814
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1814 '
Windows (Command Prompt)
netstat -ano | findstr :1814
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1814 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1814
From Windows
Test-NetConnection HOST -Port 1814
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1814

Block port 1814 in the firewall

ufw
sudo ufw deny 1814/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1814 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1814 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1814' -Direction Inbound -Protocol TCP -LocalPort 1814 -Action Block
ufw
sudo ufw deny 1814/udp
iptables
sudo iptables -A INPUT -p udp --dport 1814 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1814 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1814' -Direction Inbound -Protocol UDP -LocalPort 1814 -Action Block

Related ports

1812RADIUS authentication1813RADIUS accounting1815mmpft1816harp

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