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// Other services

Port 4850: Sun App Server - NA

Port 4850 is assigned by IANA to sun-as-nodeagt (Sun App Server - NA).

4850

How sun-as-nodeagt works

Other services
client:4850sun-as-nodeagtresponse client:4850sun-as-nodeagtresponse

The client sends a request to port 4850 and the sun-as-nodeagt 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 4850 dangerous?

We have no specific security note for port 4850. 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 4850

ServicePortTransportDescriptionReferenceUpdated
sun-as-nodeagt 4850 TCP, UDP Sun App Server - NA - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 4850, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4850'      # process listening on 4850
sudo lsof -nP -i :4850

macOS

sudo lsof -nP -i :4850

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4850 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4850
netstat -ano | findstr :4850

From another machine

nmap -p 4850 -sV <host>
sudo nmap -sU -p 4850 <host>
nc -zv <host> 4850

Block it in the firewall

sudo ufw deny 4850/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4850" -Direction Inbound -LocalPort 4850 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4850 used for?

Port 4850 is assigned by IANA to sun-as-nodeagt (Sun App Server - NA).

Is port 4850 TCP or UDP?

Port 4850 is registered for TCP and UDP.

Is it safe to open port 4850?

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 4850 is open?

On Linux run "ss -ltnup 'sport = :4850'", on macOS "lsof -nP -i :4850", and on Windows "netstat -ano | findstr :4850" to see the local process. From another machine, "nmap -p 4850 <host>" shows whether it is reachable.

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