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// Databases & caches

Port 3584: U-DBase Access Protocol

Port 3584 is assigned by IANA to u-dbap (U-DBase Access Protocol).

3584

How u-dbap works

Databases & caches
app:3584u-dbap app:3584u-dbap

The application sends a SQL query to the u-dbap server on port 3584, 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 3584 dangerous?

We have no specific security note for port 3584. 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 3584

ServicePortTransportDescriptionReferenceUpdated
u-dbap 3584 TCP, UDP U-DBase Access Protocol - 2002-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 3584, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3584'      # process listening on 3584
sudo lsof -nP -i :3584

macOS

sudo lsof -nP -i :3584

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3584 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3584
netstat -ano | findstr :3584

From another machine

nmap -p 3584 -sV <host>
sudo nmap -sU -p 3584 <host>
nc -zv <host> 3584

Block it in the firewall

sudo ufw deny 3584/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3584" -Direction Inbound -LocalPort 3584 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3584 used for?

Port 3584 is assigned by IANA to u-dbap (U-DBase Access Protocol).

Is port 3584 TCP or UDP?

Port 3584 is registered for TCP and UDP.

Is it safe to open port 3584?

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 3584 is open?

On Linux run "ss -ltnup 'sport = :3584'", on macOS "lsof -nP -i :3584", and on Windows "netstat -ano | findstr :3584" to see the local process. From another machine, "nmap -p 3584 <host>" shows whether it is reachable.

05 Related
:3306 MySQL / MariaDB tcp · udp · high risk :1433 Microsoft SQL Server tcp · udp · high risk :5432 PostgreSQL tcp · udp · high risk :6379 Redis tcp · critical risk :27017 MongoDB tcp · critical risk :9200 Elasticsearch tcp · udp · critical risk :1521 Oracle Database tcp · udp · high risk :11211 Memcached tcp · udp · high risk

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