CyberHunter
Local dataset, no network
// Other services

Port 3528: JBoss IIOP

Port 3528 is assigned by IANA to jboss-iiop (JBoss IIOP).

3528

How jboss-iiop works

Other services
client:3528jboss-iiopresponse client:3528jboss-iiopresponse

The client sends a request to port 3528 and the jboss-iiop 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 3528 dangerous?

We have no specific security note for port 3528. 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 3528

ServicePortTransportDescriptionReferenceUpdated
jboss-iiop 3528 TCP, UDP JBoss IIOP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3528, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3528'      # process listening on 3528
sudo lsof -nP -i :3528

macOS

sudo lsof -nP -i :3528

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3528 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3528
netstat -ano | findstr :3528

From another machine

nmap -p 3528 -sV <host>
sudo nmap -sU -p 3528 <host>
nc -zv <host> 3528

Block it in the firewall

sudo ufw deny 3528/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3528" -Direction Inbound -LocalPort 3528 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3528 used for?

Port 3528 is assigned by IANA to jboss-iiop (JBoss IIOP).

Is port 3528 TCP or UDP?

Port 3528 is registered for TCP and UDP.

Is it safe to open port 3528?

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 3528 is open?

On Linux run "ss -ltnup 'sport = :3528'", on macOS "lsof -nP -i :3528", and on Windows "netstat -ano | findstr :3528" to see the local process. From another machine, "nmap -p 3528 <host>" shows whether it is reachable.

05 Related
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