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// Other services

Port 442: cvc_hostd

Port 442 is assigned by IANA to cvc_hostd (cvc_hostd), cvc-hostd (cvc_hostd IANA assigned this well-formed service name as a replacement for "cvc_hostd".).

442

How cvc_hostd works

Other services
client:442cvc_hostdresponse client:442cvc_hostdresponse

The client sends a request to port 442 and the cvc_hostd service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 442 dangerous?

We have no specific security note for port 442. 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 442

ServicePortTransportDescriptionReferenceUpdated
cvc_hostd 442 TCP, UDP cvc_hostd - -
cvc-hostd 442 TCP, UDP cvc_hostd IANA assigned this well-formed service name as a replacement for "cvc_hostd". - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 442, and is it reachable?

Linux

sudo ss -ltnup 'sport = :442'      # process listening on 442
sudo lsof -nP -i :442

macOS

sudo lsof -nP -i :442

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 442 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 442
netstat -ano | findstr :442

From another machine

nmap -p 442 -sV <host>
sudo nmap -sU -p 442 <host>
nc -zv <host> 442

Block it in the firewall

sudo ufw deny 442/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 442" -Direction Inbound -LocalPort 442 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 442 used for?

Port 442 is assigned by IANA to cvc_hostd (cvc_hostd), cvc-hostd (cvc_hostd IANA assigned this well-formed service name as a replacement for "cvc_hostd".).

Is port 442 TCP or UDP?

Port 442 is registered for TCP and UDP.

Is it safe to open port 442?

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 442 is open?

On Linux run "ss -ltnup 'sport = :442'", on macOS "lsof -nP -i :442", and on Windows "netstat -ano | findstr :442" to see the local process. From another machine, "nmap -p 442 <host>" shows whether it is reachable.

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