Firewall 2008 R2 blocking SQL traffic by default

After spending some time trying to install Microsoft OpsManager and Virtual Machine Manager I got stuck after the installations try to connect the SQL database which was installed on another server in the domain.

It’s really important to open some firewall ports when SQL is installed on a Windows 2008 R2 host.

Create a script on the SQL server and execute it, after that all works like a charm 🙂

@echo =========  SQL Server Ports  ===================
@echo Enabling SQLServer default instance port 1433
netsh firewall set portopening TCP 1433 “SQLServer”
@echo Enabling Dedicated Admin Connection port 1434
netsh firewall set portopening TCP 1434 “SQL Admin Connection”
@echo Enabling conventional SQL Server Service Broker port 4022 
netsh firewall set portopening TCP 4022 “SQL Service Broker”
@echo Enabling Transact-SQL Debugger/RPC port 135
netsh firewall set portopening TCP 135 “SQL Debugger/RPC”
@echo =========  Analysis Services Ports  ==============
@echo Enabling SSAS Default Instance port 2383
netsh firewall set portopening TCP 2383 “Analysis Services”
@echo Enabling SQL Server Browser Service port 2382
netsh firewall set portopening TCP 2382 “SQL Browser”
@echo =========  Misc Applications  ==============
@echo Enabling HTTP port 80
netsh firewall set portopening TCP 80 “HTTP”
@echo Enabling SSL port 443
netsh firewall set portopening TCP 443 “SSL”
@echo Enabling port for SQL Server Browser Service’s ‘Browse’ Button
netsh firewall set portopening UDP 1434 “SQL Browser”
@echo Allowing multicast broadcast response on UDP (Browser Service Enumerations OK)
netsh firewall set multicastbroadcastresponse ENABLE

Also see this KB article @ Microsoft support.

Daniel Nikolic

Is interested in everything connected to technology. Has a passion for cloud, virtualization and software development. Always finds appropriate IT solutions for customers that match their needs strategically, technically and financially.


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