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// Databases & caches

Port 2481: Oracle GIOP

Port 2481 is assigned by IANA to giop (Oracle GIOP).

2481

How giop works

Databases & caches
app:2481giop app:2481giop

The application sends a SQL query to the giop server on port 2481, which returns rows from its tables.

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
Databases & caches
01 Security

Is port 2481 dangerous?

We have no specific security note for port 2481. Its risk depends on the program actually listening on it. General advice for databases & caches services:

  • Bind the service to localhost or a private network, never to a public address.
  • Enable authentication, use per-application accounts and require TLS.
  • Watch for exposed Docker ports: publish them on 127.0.0.1 only.
02 Registry

IANA registry entries for port 2481

ServicePortTransportDescriptionReferenceUpdated
giop 2481 TCP, UDP Oracle GIOP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2481, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2481'      # process listening on 2481
sudo lsof -nP -i :2481

macOS

sudo lsof -nP -i :2481

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2481 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2481
netstat -ano | findstr :2481

From another machine

nmap -p 2481 -sV <host>
sudo nmap -sU -p 2481 <host>
nc -zv <host> 2481

Block it in the firewall

sudo ufw deny 2481/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2481" -Direction Inbound -LocalPort 2481 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2481 used for?

Port 2481 is assigned by IANA to giop (Oracle GIOP).

Is port 2481 TCP or UDP?

Port 2481 is registered for TCP and UDP.

Is it safe to open port 2481?

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. Bind the service to localhost or a private network, never to a public address.

How do I check if port 2481 is open?

On Linux run "ss -ltnup 'sport = :2481'", on macOS "lsof -nP -i :2481", and on Windows "netstat -ano | findstr :2481" to see the local process. From another machine, "nmap -p 2481 <host>" shows whether it is reachable.

05 Related
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