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// Network services

Port 458: apple quick time

Port 458 is assigned by IANA to appleqtc (apple quick time).

458

How appleqtc works

Network services
client:458appleqtcresponse client:458appleqtcresponse

The client sends a request to port 458 and the appleqtc 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
Network services
01 Security

Is port 458 dangerous?

We have no specific security note for port 458. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 458

ServicePortTransportDescriptionReferenceUpdated
appleqtc 458 TCP, UDP apple quick time - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 458, and is it reachable?

Linux

sudo ss -ltnup 'sport = :458'      # process listening on 458
sudo lsof -nP -i :458

macOS

sudo lsof -nP -i :458

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 458 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 458
netstat -ano | findstr :458

From another machine

nmap -p 458 -sV <host>
sudo nmap -sU -p 458 <host>
nc -zv <host> 458

Block it in the firewall

sudo ufw deny 458/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 458" -Direction Inbound -LocalPort 458 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 458 used for?

Port 458 is assigned by IANA to appleqtc (apple quick time).

Is port 458 TCP or UDP?

Port 458 is registered for TCP and UDP.

Is it safe to open port 458?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 458 is open?

On Linux run "ss -ltnup 'sport = :458'", on macOS "lsof -nP -i :458", and on Windows "netstat -ano | findstr :458" to see the local process. From another machine, "nmap -p 458 <host>" shows whether it is reachable.

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