HTTPfy

Port 472 (ljk-login)

IANA assigns port 472 to ljk-login.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ljk-login TCP ljk-login LJK -
ljk-login UDP ljk-login LJK -

Check what is listening on port 472

Linux: is anything listening on TCP 472?
sudo ss -tlnp 'sport = :472'
Linux: UDP 472
sudo ss -ulnp 'sport = :472'
Linux / macOS: which process owns the port
sudo lsof -nP -i :472
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':472 '
Windows (Command Prompt)
netstat -ano | findstr :472
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 472 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 472
From Windows
Test-NetConnection HOST -Port 472
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 472

Block port 472 in the firewall

ufw
sudo ufw deny 472/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 472 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 472 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 472' -Direction Inbound -Protocol TCP -LocalPort 472 -Action Block
ufw
sudo ufw deny 472/udp
iptables
sudo iptables -A INPUT -p udp --dport 472 -j DROP
nftables
sudo nft add rule inet filter input udp dport 472 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 472' -Direction Inbound -Protocol UDP -LocalPort 472 -Action Block

Related ports

470scx-proxy471mondex473hybrid-pop474tn-tl-w1, tn-tl-w2

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