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// Other services

Port 3708: Sun App Svr - Naming

Port 3708 is assigned by IANA to sun-as-iiops (Sun App Svr - Naming).

3708

How sun-as-iiops works

Other services
client:3708sun-as-iiopsresponse client:3708sun-as-iiopsresponse

The client sends a request to port 3708 and the sun-as-iiops 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 3708 dangerous?

We have no specific security note for port 3708. 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 3708

ServicePortTransportDescriptionReferenceUpdated
sun-as-iiops 3708 TCP, UDP Sun App Svr - Naming - 2005-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 3708, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3708'      # process listening on 3708
sudo lsof -nP -i :3708

macOS

sudo lsof -nP -i :3708

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3708 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3708
netstat -ano | findstr :3708

From another machine

nmap -p 3708 -sV <host>
sudo nmap -sU -p 3708 <host>
nc -zv <host> 3708

Block it in the firewall

sudo ufw deny 3708/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3708" -Direction Inbound -LocalPort 3708 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3708 used for?

Port 3708 is assigned by IANA to sun-as-iiops (Sun App Svr - Naming).

Is port 3708 TCP or UDP?

Port 3708 is registered for TCP and UDP.

Is it safe to open port 3708?

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 3708 is open?

On Linux run "ss -ltnup 'sport = :3708'", on macOS "lsof -nP -i :3708", and on Windows "netstat -ano | findstr :3708" to see the local process. From another machine, "nmap -p 3708 <host>" shows whether it is reachable.

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