CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Databases & caches

Port 4427: Drizzle database server

Port 4427 is assigned by IANA to drizzle (Drizzle database server).

4427

How drizzle works

Databases & caches
app:4427drizzle app:4427drizzle

The application sends a SQL query to the drizzle server on port 4427, which returns rows from its tables.

Transport
TCP
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 4427 dangerous?

We have no specific security note for port 4427. 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 4427

ServicePortTransportDescriptionReferenceUpdated
drizzle 4427 TCP Drizzle database server - 2008-07-09
-4427-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4427, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4427'      # process listening on 4427
sudo lsof -nP -i :4427

macOS

sudo lsof -nP -i :4427

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4427 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4427
netstat -ano | findstr :4427

From another machine

nmap -p 4427 -sV <host>
nc -zv <host> 4427

Block it in the firewall

sudo ufw deny 4427/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4427" -Direction Inbound -LocalPort 4427 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4427 used for?

Port 4427 is assigned by IANA to drizzle (Drizzle database server).

Is port 4427 TCP or UDP?

Port 4427 is registered for TCP.

Is it safe to open port 4427?

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 4427 is open?

On Linux run "ss -ltnup 'sport = :4427'", on macOS "lsof -nP -i :4427", and on Windows "netstat -ano | findstr :4427" to see the local process. From another machine, "nmap -p 4427 <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

Latest vulnerability news

All news