HTTPfy

Port 1787 (funk-license)

IANA assigns port 1787 to funk-license.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
funk-license TCP funk-license Cimarron Boozer, Eric Wilde -
funk-license UDP funk-license Cimarron Boozer, Eric Wilde -

Check what is listening on port 1787

Linux: is anything listening on TCP 1787?
sudo ss -tlnp 'sport = :1787'
Linux: UDP 1787
sudo ss -ulnp 'sport = :1787'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1787
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1787 '
Windows (Command Prompt)
netstat -ano | findstr :1787
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1787 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1787
From Windows
Test-NetConnection HOST -Port 1787
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1787

Block port 1787 in the firewall

ufw
sudo ufw deny 1787/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1787 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1787 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1787' -Direction Inbound -Protocol TCP -LocalPort 1787 -Action Block
ufw
sudo ufw deny 1787/udp
iptables
sudo iptables -A INPUT -p udp --dport 1787 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1787 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1787' -Direction Inbound -Protocol UDP -LocalPort 1787 -Action Block

Related ports

1785windlm1786funk-logger1788psmond1789hello

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