CyberHunter
Local dataset, no network
// Other services

Port 4308: CompX-LockView

Port 4308 is assigned by IANA to compx-lockview (CompX-LockView).

4308

How compx-lockview works

Other services
client:4308compx-lockviewresponse client:4308compx-lockviewresponse

The client sends a request to port 4308 and the compx-lockview 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 4308 dangerous?

We have no specific security note for port 4308. 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 4308

ServicePortTransportDescriptionReferenceUpdated
compx-lockview 4308 TCP, UDP CompX-LockView - 2007-10-22

// source: IANA service name and port number registry

03 Check it

Which program uses port 4308, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4308'      # process listening on 4308
sudo lsof -nP -i :4308

macOS

sudo lsof -nP -i :4308

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4308 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4308
netstat -ano | findstr :4308

From another machine

nmap -p 4308 -sV <host>
sudo nmap -sU -p 4308 <host>
nc -zv <host> 4308

Block it in the firewall

sudo ufw deny 4308/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4308" -Direction Inbound -LocalPort 4308 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4308 used for?

Port 4308 is assigned by IANA to compx-lockview (CompX-LockView).

Is port 4308 TCP or UDP?

Port 4308 is registered for TCP and UDP.

Is it safe to open port 4308?

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 4308 is open?

On Linux run "ss -ltnup 'sport = :4308'", on macOS "lsof -nP -i :4308", and on Windows "netstat -ano | findstr :4308" to see the local process. From another machine, "nmap -p 4308 <host>" shows whether it is reachable.

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