HTTPfy

Port 1212 (lupa)

IANA assigns port 1212 to lupa.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
lupa TCP lupa Barney Wolff -
lupa UDP lupa Barney Wolff -

Check what is listening on port 1212

Linux: is anything listening on TCP 1212?
sudo ss -tlnp 'sport = :1212'
Linux: UDP 1212
sudo ss -ulnp 'sport = :1212'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1212
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1212 '
Windows (Command Prompt)
netstat -ano | findstr :1212
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1212 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1212
From Windows
Test-NetConnection HOST -Port 1212
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1212

Block port 1212 in the firewall

ufw
sudo ufw deny 1212/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1212 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1212 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1212' -Direction Inbound -Protocol TCP -LocalPort 1212 -Action Block
ufw
sudo ufw deny 1212/udp
iptables
sudo iptables -A INPUT -p udp --dport 1212 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1212 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1212' -Direction Inbound -Protocol UDP -LocalPort 1212 -Action Block

Related ports

1210eoss1211groove-dpp1213mpc-lifenet1214kazaa

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