HTTPfy

Port 4545 (worldscores)

IANA assigns port 4545 to worldscores: WorldScores.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
worldscores TCP WorldScores Steve Davis -
worldscores UDP WorldScores Steve Davis -

Check what is listening on port 4545

Linux: is anything listening on TCP 4545?
sudo ss -tlnp 'sport = :4545'
Linux: UDP 4545
sudo ss -ulnp 'sport = :4545'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4545
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4545 '
Windows (Command Prompt)
netstat -ano | findstr :4545
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4545 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4545
From Windows
Test-NetConnection HOST -Port 4545
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4545

Block port 4545 in the firewall

ufw
sudo ufw deny 4545/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4545 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4545 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4545' -Direction Inbound -Protocol TCP -LocalPort 4545 -Action Block
ufw
sudo ufw deny 4545/udp
iptables
sudo iptables -A INPUT -p udp --dport 4545 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4545 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4545' -Direction Inbound -Protocol UDP -LocalPort 4545 -Action Block

Related ports

4537wssauthsvc4538swx-gate4546sf-lm4547lanner-lm

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