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Port 1844 (direcpc-dll)

IANA assigns port 1844 to direcpc-dll: DirecPC-DLL.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
direcpc-dll TCP DirecPC-DLL Chris Kerrigan -
direcpc-dll UDP DirecPC-DLL Chris Kerrigan -

Check what is listening on port 1844

Linux: is anything listening on TCP 1844?
sudo ss -tlnp 'sport = :1844'
Linux: UDP 1844
sudo ss -ulnp 'sport = :1844'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1844
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1844 '
Windows (Command Prompt)
netstat -ano | findstr :1844
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1844 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1844
From Windows
Test-NetConnection HOST -Port 1844
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1844

Block port 1844 in the firewall

ufw
sudo ufw deny 1844/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1844 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1844 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1844' -Direction Inbound -Protocol TCP -LocalPort 1844 -Action Block
ufw
sudo ufw deny 1844/udp
iptables
sudo iptables -A INPUT -p udp --dport 1844 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1844 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1844' -Direction Inbound -Protocol UDP -LocalPort 1844 -Action Block

Related ports

1842netopia-vo41843netopia-vo51845altalink1846tunstall-pnc

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