HTTPfy

Port 454 (contentserver)

IANA assigns port 454 to contentserver: ContentServer.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
contentserver TCP ContentServer - -
contentserver UDP ContentServer - -

Check what is listening on port 454

Linux: is anything listening on TCP 454?
sudo ss -tlnp 'sport = :454'
Linux: UDP 454
sudo ss -ulnp 'sport = :454'
Linux / macOS: which process owns the port
sudo lsof -nP -i :454
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':454 '
Windows (Command Prompt)
netstat -ano | findstr :454
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 454 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 454
From Windows
Test-NetConnection HOST -Port 454
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 454

Block port 454 in the firewall

ufw
sudo ufw deny 454/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 454 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 454 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 454' -Direction Inbound -Protocol TCP -LocalPort 454 -Action Block
ufw
sudo ufw deny 454/udp
iptables
sudo iptables -A INPUT -p udp --dport 454 -j DROP
nftables
sudo nft add rule inet filter input udp dport 454 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 454' -Direction Inbound -Protocol UDP -LocalPort 454 -Action Block

Related ports

3365contentserver452sfs-config453creativeserver455creativepartnr456macon-tcp, macon-udp

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