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// Other services

Port 4984: WebYast

Port 4984 is assigned by IANA to webyast (WebYast).

4984

How webyast works

Other services
client:4984webyastresponse client:4984webyastresponse

The client sends a request to port 4984 and the webyast service answers.

Transport
TCP
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 4984 dangerous?

We have no specific security note for port 4984. 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 4984

ServicePortTransportDescriptionReferenceUpdated
webyast 4984 TCP WebYast - 2009-09-25
-4984-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4984, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4984'      # process listening on 4984
sudo lsof -nP -i :4984

macOS

sudo lsof -nP -i :4984

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4984 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4984
netstat -ano | findstr :4984

From another machine

nmap -p 4984 -sV <host>
nc -zv <host> 4984

Block it in the firewall

sudo ufw deny 4984/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4984" -Direction Inbound -LocalPort 4984 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4984 used for?

Port 4984 is assigned by IANA to webyast (WebYast).

Is port 4984 TCP or UDP?

Port 4984 is registered for TCP.

Is it safe to open port 4984?

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 4984 is open?

On Linux run "ss -ltnup 'sport = :4984'", on macOS "lsof -nP -i :4984", and on Windows "netstat -ano | findstr :4984" to see the local process. From another machine, "nmap -p 4984 <host>" shows whether it is reachable.

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