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// Databases & caches

Port 9089: IBM Informix SQL Interface - Encrypted

Port 9089 is assigned by IANA to sqlexec-ssl (IBM Informix SQL Interface - Encrypted).

9089

How sqlexec-ssl works

Databases & caches
app:9089#%&@!x9? app:9089#%&@!x9?

The application sends a SQL query to the sqlexec-ssl server on port 9089, which returns rows from its tables. Everything is encrypted: someone on the path only sees unreadable bytes.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
EncryptedTLS or built-in crypto
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Databases & caches
01 Security

Is port 9089 dangerous?

We have no specific security note for port 9089. 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 9089

ServicePortTransportDescriptionReferenceUpdated
sqlexec-ssl 9089 TCP, UDP IBM Informix SQL Interface - Encrypted - 2005-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 9089, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9089'      # process listening on 9089
sudo lsof -nP -i :9089

macOS

sudo lsof -nP -i :9089

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9089 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9089
netstat -ano | findstr :9089

From another machine

nmap -p 9089 -sV <host>
sudo nmap -sU -p 9089 <host>
nc -zv <host> 9089

Block it in the firewall

sudo ufw deny 9089/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9089" -Direction Inbound -LocalPort 9089 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9089 used for?

Port 9089 is assigned by IANA to sqlexec-ssl (IBM Informix SQL Interface - Encrypted).

Is port 9089 TCP or UDP?

Port 9089 is registered for TCP and UDP.

Is it safe to open port 9089?

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 9089 is open?

On Linux run "ss -ltnup 'sport = :9089'", on macOS "lsof -nP -i :9089", and on Windows "netstat -ano | findstr :9089" to see the local process. From another machine, "nmap -p 9089 <host>" shows whether it is reachable.

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