CyberHunter
Local dataset, no network
// Other services

Port 452: Cray SFS config server

Port 452 is assigned by IANA to sfs-config (Cray SFS config server).

452

How sfs-config works

Other services
client:452sfs-configresponse client:452sfs-configresponse

The client sends a request to port 452 and the sfs-config 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 452 dangerous?

We have no specific security note for port 452. 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 452

ServicePortTransportDescriptionReferenceUpdated
sfs-config 452 TCP, UDP Cray SFS config server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 452, and is it reachable?

Linux

sudo ss -ltnup 'sport = :452'      # process listening on 452
sudo lsof -nP -i :452

macOS

sudo lsof -nP -i :452

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 452 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 452
netstat -ano | findstr :452

From another machine

nmap -p 452 -sV <host>
sudo nmap -sU -p 452 <host>
nc -zv <host> 452

Block it in the firewall

sudo ufw deny 452/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 452" -Direction Inbound -LocalPort 452 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 452 used for?

Port 452 is assigned by IANA to sfs-config (Cray SFS config server).

Is port 452 TCP or UDP?

Port 452 is registered for TCP and UDP.

Is it safe to open port 452?

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 452 is open?

On Linux run "ss -ltnup 'sport = :452'", on macOS "lsof -nP -i :452", and on Windows "netstat -ano | findstr :452" to see the local process. From another machine, "nmap -p 452 <host>" shows whether it is reachable.

05 Related
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