CyberHunter
Local dataset, no network
// Other services

Port 454: ContentServer

Port 454 is assigned by IANA to contentserver (ContentServer).

454

How contentserver works

Other services
client:454contentserverresponse client:454contentserverresponse

The client sends a request to port 454 and the contentserver service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 454 dangerous?

We have no specific security note for port 454. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 454

ServicePortTransportDescriptionReferenceUpdated
contentserver 454 TCP, UDP ContentServer - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 454, and is it reachable?

Linux

sudo ss -ltnup 'sport = :454'      # process listening on 454
sudo lsof -nP -i :454

macOS

sudo lsof -nP -i :454

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 454 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 454
netstat -ano | findstr :454

From another machine

nmap -p 454 -sV <host>
sudo nmap -sU -p 454 <host>
nc -zv <host> 454

Block it in the firewall

sudo ufw deny 454/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 454" -Direction Inbound -LocalPort 454 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 454 used for?

Port 454 is assigned by IANA to contentserver (ContentServer).

Is port 454 TCP or UDP?

Port 454 is registered for TCP and UDP.

Is it safe to open port 454?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 454 is open?

On Linux run "ss -ltnup 'sport = :454'", on macOS "lsof -nP -i :454", and on Windows "netstat -ano | findstr :454" to see the local process. From another machine, "nmap -p 454 <host>" shows whether it is reachable.

05 Related
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