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// Databases & caches

Port 1525: oracle

Port 1525 is assigned by IANA to orasrv (oracle), prospero-np (Prospero Directory Service non-priv).

1525

How orasrv works

Databases & caches
app:1525orasrv app:1525orasrv

The application sends a SQL query to the orasrv server on port 1525, 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
Assigned2 registered services
Range
Registered (1024-49151)
Category
Databases & caches
01 Security

Is port 1525 dangerous?

We have no specific security note for port 1525. 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 1525

ServicePortTransportDescriptionReferenceUpdated
orasrv 1525 TCP, UDP oracle - -
prospero-np 1525 TCP, UDP Prospero Directory Service non-priv - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1525, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1525'      # process listening on 1525
sudo lsof -nP -i :1525

macOS

sudo lsof -nP -i :1525

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1525 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1525
netstat -ano | findstr :1525

From another machine

nmap -p 1525 -sV <host>
sudo nmap -sU -p 1525 <host>
nc -zv <host> 1525

Block it in the firewall

sudo ufw deny 1525/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1525" -Direction Inbound -LocalPort 1525 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1525 used for?

Port 1525 is assigned by IANA to orasrv (oracle), prospero-np (Prospero Directory Service non-priv).

Is port 1525 TCP or UDP?

Port 1525 is registered for TCP and UDP.

Is it safe to open port 1525?

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 1525 is open?

On Linux run "ss -ltnup 'sport = :1525'", on macOS "lsof -nP -i :1525", and on Windows "netstat -ano | findstr :1525" to see the local process. From another machine, "nmap -p 1525 <host>" shows whether it is reachable.

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