Port 4427Drizzle Database Server

TCP port 4427 is the default port for the historical Drizzle relational database server, a MySQL-derived database.

transport: tcp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

Technical Details

what runs on :4427

Drizzle listens over TCP, normally on port 4427, and speaks a MySQL-derived client/server protocol intended to work with Drizzle clients and compatible tooling. This is a database service, not a general-purpose application port; deployments may use a different port or bind only to a private interface. Do not assume the connection is encrypted by default.

Security Information

exposure of :4427

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

databases averages 3.7 across 142 ports — this one sits 1.7 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

If a Drizzle server is actually listening, an exposed database can invite connection attempts, password guessing, and access to stored data; restrict it to trusted networks and verify authentication and transport protection. Drizzle is a historical and rarely encountered project, and this port has not appeared open in the cited Nmap scan data.

Record

iana registry entry

port: :4427
service: Drizzle Database Server
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Databases
usage: Drizzle is an open-source relational database derived from MySQL; its server uses TCP port 4427 by default. It is a historical, rarely encountered service rather than a port commonly found on modern internet-facing systems.
lookups: 0rank 993
added: 2026-10-04
updated: 2026-10-04
references: IANA service name registry — port 4427

Something wrong?

This record is maintained by the engineers who use port 4427. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-04.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

Related Ports

all 142 in databases →

the 8 most looked-up other ports in databases — 142 ports carry that label.

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:8882	Atlasz Secure App Server	TCP	Web Services	caution	66.9k
:9001	ETL Service Manager	TCPUDP	Databases	caution	28.6k
:2484	Oracle SSL Listener	TCPUDPtls	Security	caution	25.0k
:5495	Applix TM1 Admin	TCP	Databases	caution	24.8k
:591	FileMaker Web Sharing	TCP	Web Services	caution	23.1k
:1521	Oracle TNS Listener	TCP	Security	caution	19.6k
:21001	AMLFilter Admin	TCP	Security	caution	19.2k
:18206	Audition FAM DB	TCPUDP	Databases	caution	19.1k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :4427Drizzle Database Server

Technical Details

Security Information

Related Ports

Port 4427Drizzle Database Server