Not be able to connect to Azure SQL after connect through VPN

Question

I am having a really wired problem with my home laptop.

Below is what I have done:

I have set up my own VPN via AWS. I added VPN ip address to Azure SQL firewall ip table

By not having VPN, I can connect to Azure easily. However, once I connect to the VPN, I got error when I try to connect to Azure.

Error message:

A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: TCP Provider, error: 0 - The specified network name is no longer available.)

On the other hand, I can use VPN and connect to Azure SUCCESSFULLY from my office desktop.

I believe this is something to do with my Home laptop settings. but even I disabled firewall on windows 7, and after disable firewall on azure SQL as well.

I still having same connection problem

any ideas?

Answer 1

Try opening up the SQL Azure firewall to all addresses to do a test. Maybe when you VPN in, you are leaving through a proxy and so your actualy IP address to Azure is different. You can set up something like:

IP range start: 0.0.0.0

IP range end: 255.255.255.255

If that works, then maybe you can do something with masking your VPN address like:

10.10.0.0 - 10.10.255.255

Answer 2

By not having VPN, I can connect to Azure easily. However, once I connect to the VPN, I got error when I try to connect to Azure.

Some VPNs support co-existence with normal internet connections while others don't. I am not sure if AWS VPN supports that or not. If not, when you connect to the VPN, you lose your internet connection and thus cannot connect to SQL Azure.

On the other hand, I can use VPN and connect to Azure SUCCESSFULLY from my office desktop.

If the issue is related to firewall setting, you can try to change the setting programmatically, please refer to http://blogs.msdn.com/b/sqlazure/archive/2010/07/29/10043869.aspx for a sample.

Best Regards,

Ming Xu.