Asp.net application not connect to SQL database when firewall enbled

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SQL-Server-2005

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Hi All,

I have hosted web applicatio to our production server.
then tried to connect application to the SQL server 2005 database.

application get connected if firewall is disabled.
but it could not connected if firewall is enabled, It gives error message as below:

"A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)"

My connection string in web.config file is:
<add key="connectionString" value="uid=username;pwd=Password;Database=Databasename;Server=Servername\Databasename;Persist Security Info=true;"/>

please advise me.
appreciate your help...

Posted 1-Aug-12 5:39am

sanjayv.gade

Updated 1-Aug-12 5:43am

v3

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[no name] 1-Aug-12 12:06pm

The obvious thing to do would be to have your IT guy configure the firewall to allow the connection...

3 solutions

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2012-08-01T06:14:00

Solution 1

Please check the links below.

1. 7 things to check to resolve “A network-related or instance-specific error occurred while establishing a connection to SQL Server…”[^].
2. provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified[^].

Posted 1-Aug-12 6:14am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Deepak_Sharma_ · Answer 2 · 2012-08-01T08:32:00

Solution 2

Hi,
Add exception for "sqlservr.exe" and "sqlbrowser.exe" in your firewall

Path in SQL Server 2005 :
C:\Program Files\Microsoft SQL Server\90\Shared\sqlbrowser.exe
C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Binn \sqlservr.exe

Posted 1-Aug-12 8:32am

Deepak_Sharma_

devsuja · Answer 3 · 2012-08-03T21:34:00

Solution 3

hi,

Check ur sql 2005 port enabled for using thro' ur application

Posted 3-Aug-12 21:34pm

devsuja