HTTPfy

Port 474 (tn-tl-w1, tn-tl-w2)

IANA assigns port 474 to tn-tl-w1, tn-tl-w2: tn-tl-w1.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
tn-tl-w1 TCP tn-tl-w1 - -
tn-tl-w2 UDP tn-tl-w2 Ed Kress -

Check what is listening on port 474

Linux: is anything listening on TCP 474?
sudo ss -tlnp 'sport = :474'
Linux: UDP 474
sudo ss -ulnp 'sport = :474'
Linux / macOS: which process owns the port
sudo lsof -nP -i :474
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':474 '
Windows (Command Prompt)
netstat -ano | findstr :474
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 474 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 474
From Windows
Test-NetConnection HOST -Port 474
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 474

Block port 474 in the firewall

ufw
sudo ufw deny 474/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 474 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 474 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 474' -Direction Inbound -Protocol TCP -LocalPort 474 -Action Block
ufw
sudo ufw deny 474/udp
iptables
sudo iptables -A INPUT -p udp --dport 474 -j DROP
nftables
sudo nft add rule inet filter input udp dport 474 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 474' -Direction Inbound -Protocol UDP -LocalPort 474 -Action Block

Related ports

472ljk-login473hybrid-pop475tcpnethaspsrv476tn-tl-fd1

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