>>>Hi all,
>>>
>>>I've cmoe across a weird situation that I can't get around. A customer has an SQL instance on a server and we want to start using it. Standard enough so far and I wrote a small prg that connect to the SQL server and inserts a row. On the Server it works no problem, with both windows authentication and SQL authentication in the connection string.
>>>The problem is that on the network if I try to run this simple program it fails. The program does not make a connection to the server. I have tried opening ports on the server and the client pc but no difference. I have also tried turning off the AV but no difference. I've gotten it to the point where I can telnet to the server on port 1433 but still the connection fails. Initially the telnet was failing as well but I changed the dynamic port in the SQL configuration.
>>>On a different client PC i installed sql server 2008 and then was able to use my program to insert into the SQL database on the server, but I can't go installing SQL on every client PC.
>>>Server is Win server 2008R2 and SQL server 2008. There were 3 instances of SQL running, 2 have now been uninstalled as they are no longer used.
>>>Any idea on what to try next or any tool to use? I've googled and confirmed all the regular settings are correct.
>>>
>>>~M
>>
>>I'll bet you it's the firewall. I had the same issue when I set it up on our network. I even made a blog post about my experience:
>>
>>http://mattslay.com/opening-up-sql-server-to-allow-remote-connections/
>>
>Thanks Matt,
>I've tried opening 1433 and udp 1434 on the server and client, telnet works but not sql connection.
>~M


Check these settings in Sql Server Configuration Manager:

http://content.screencast.com/users/MattSlay/folders/Snagit/media/84dbcab5-aa7e-4867-a6e5-6cef7040e40a/11.05.2015-11.35.png


.