HTTPfy

Port 2518 (willy)

IANA assigns port 2518 to willy: Willy.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
willy TCP Willy Carl Johan Wik -
willy UDP Willy Carl Johan Wik -

Check what is listening on port 2518

Linux: is anything listening on TCP 2518?
sudo ss -tlnp 'sport = :2518'
Linux: UDP 2518
sudo ss -ulnp 'sport = :2518'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2518
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2518 '
Windows (Command Prompt)
netstat -ano | findstr :2518
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2518 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2518
From Windows
Test-NetConnection HOST -Port 2518
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2518

Block port 2518 in the firewall

ufw
sudo ufw deny 2518/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2518 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2518 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2518' -Direction Inbound -Protocol TCP -LocalPort 2518 -Action Block
ufw
sudo ufw deny 2518/udp
iptables
sudo iptables -A INPUT -p udp --dport 2518 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2518 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2518' -Direction Inbound -Protocol UDP -LocalPort 2518 -Action Block

Related ports

2516maincontrol2517call-sig-trans2519globmsgsvc2520pvsw

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