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// Databases & caches

Port 6446: MySQL Proxy

Port 6446 is assigned by IANA to mysql-proxy (MySQL Proxy).

6446

How mysql-proxy works

Databases & caches
app:6446mysql-proxy app:6446mysql-proxy

The application sends a SQL query to the mysql-proxy server on port 6446, 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 6446 dangerous?

We have no specific security note for port 6446. 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 6446

ServicePortTransportDescriptionReferenceUpdated
mysql-proxy 6446 TCP, UDP MySQL Proxy - 2009-04-22

// source: IANA service name and port number registry

03 Check it

Which program uses port 6446, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6446'      # process listening on 6446
sudo lsof -nP -i :6446

macOS

sudo lsof -nP -i :6446

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6446 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6446
netstat -ano | findstr :6446

From another machine

nmap -p 6446 -sV <host>
sudo nmap -sU -p 6446 <host>
nc -zv <host> 6446

Block it in the firewall

sudo ufw deny 6446/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6446" -Direction Inbound -LocalPort 6446 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6446 used for?

Port 6446 is assigned by IANA to mysql-proxy (MySQL Proxy).

Is port 6446 TCP or UDP?

Port 6446 is registered for TCP and UDP.

Is it safe to open port 6446?

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 6446 is open?

On Linux run "ss -ltnup 'sport = :6446'", on macOS "lsof -nP -i :6446", and on Windows "netstat -ano | findstr :6446" to see the local process. From another machine, "nmap -p 6446 <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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