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Port 453 (creativeserver)

IANA assigns port 453 to creativeserver: CreativeServer.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
creativeserver TCP CreativeServer - -
creativeserver UDP CreativeServer - -

Check what is listening on port 453

Linux: is anything listening on TCP 453?
sudo ss -tlnp 'sport = :453'
Linux: UDP 453
sudo ss -ulnp 'sport = :453'
Linux / macOS: which process owns the port
sudo lsof -nP -i :453
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':453 '
Windows (Command Prompt)
netstat -ano | findstr :453
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 453 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 453
From Windows
Test-NetConnection HOST -Port 453
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 453

Block port 453 in the firewall

ufw
sudo ufw deny 453/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 453 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 453 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 453' -Direction Inbound -Protocol TCP -LocalPort 453 -Action Block
ufw
sudo ufw deny 453/udp
iptables
sudo iptables -A INPUT -p udp --dport 453 -j DROP
nftables
sudo nft add rule inet filter input udp dport 453 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 453' -Direction Inbound -Protocol UDP -LocalPort 453 -Action Block

Related ports

3364creativeserver451sfs-smp-net452sfs-config454contentserver455creativepartnr

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