CyberHunter
Local dataset, no network
// Other services

Port 4058: Kingfisher protocol

Port 4058 is assigned by IANA to kingfisher (Kingfisher protocol).

4058

How kingfisher works

Other services
client:4058kingfisherresponse client:4058kingfisherresponse

The client sends a request to port 4058 and the kingfisher 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 4058 dangerous?

We have no specific security note for port 4058. 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 4058

ServicePortTransportDescriptionReferenceUpdated
kingfisher 4058 TCP, UDP Kingfisher protocol - 2006-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 4058, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4058'      # process listening on 4058
sudo lsof -nP -i :4058

macOS

sudo lsof -nP -i :4058

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4058 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4058
netstat -ano | findstr :4058

From another machine

nmap -p 4058 -sV <host>
sudo nmap -sU -p 4058 <host>
nc -zv <host> 4058

Block it in the firewall

sudo ufw deny 4058/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4058" -Direction Inbound -LocalPort 4058 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4058 used for?

Port 4058 is assigned by IANA to kingfisher (Kingfisher protocol).

Is port 4058 TCP or UDP?

Port 4058 is registered for TCP and UDP.

Is it safe to open port 4058?

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 4058 is open?

On Linux run "ss -ltnup 'sport = :4058'", on macOS "lsof -nP -i :4058", and on Windows "netstat -ano | findstr :4058" to see the local process. From another machine, "nmap -p 4058 <host>" shows whether it is reachable.

05 Related
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