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Local dataset, no network
// Databases & caches

Port 1748: oracle-em1

Port 1748 is assigned by IANA to oracle-em1 (oracle-em1).

1748

How oracle-em1 works

Databases & caches
app:1748oracle-em1 app:1748oracle-em1

The application sends a SQL query to the oracle-em1 server on port 1748, 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 1748 dangerous?

We have no specific security note for port 1748. 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 1748

ServicePortTransportDescriptionReferenceUpdated
oracle-em1 1748 TCP, UDP oracle-em1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1748, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1748'      # process listening on 1748
sudo lsof -nP -i :1748

macOS

sudo lsof -nP -i :1748

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1748 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1748
netstat -ano | findstr :1748

From another machine

nmap -p 1748 -sV <host>
sudo nmap -sU -p 1748 <host>
nc -zv <host> 1748

Block it in the firewall

sudo ufw deny 1748/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1748" -Direction Inbound -LocalPort 1748 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1748 used for?

Port 1748 is assigned by IANA to oracle-em1 (oracle-em1).

Is port 1748 TCP or UDP?

Port 1748 is registered for TCP and UDP.

Is it safe to open port 1748?

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 1748 is open?

On Linux run "ss -ltnup 'sport = :1748'", on macOS "lsof -nP -i :1748", and on Windows "netstat -ano | findstr :1748" to see the local process. From another machine, "nmap -p 1748 <host>" shows whether it is reachable.

05 Related
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