SQL Server 2019 Cluster on AWS EC2 Port Allow

Kelvin Shee 1 Reputation point
2021-08-02T10:28:19.317+00:00

hi please help, I setup SQL Server Cluster on EC2, may I know what is the SQL Server Cluster port number that I need allow in security group when windows firewall is enable?

I been allow port
TCP 135,1433,3343
UDP 137,3343

but is still failed to connect cluster?

do any port that I miss setup? thanks.

SQL Server
SQL Server
A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions.
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  1. CathyJi-MSFT 21,096 Reputation points Microsoft Vendor
    2021-08-03T07:27:27.883+00:00

    Hi @Kelvin Shee ,

    Try to allow port UDP 1434.

    Quote from MS document Ports Used By the Database Engine.

    By default, the typical ports used by SQL Server and associated database engine services are: TCP 1433, 4022, 135, 1434, UDP 1434.


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