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- Have you provided an external IP or hostname that can be accessed outside of your network?
- Do you have a firewall, have you opened it for our IP numbers?
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- What port is SQL running on
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- , and is this opened via the firewall?
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- Please advise port number if not the default, 1433.
- Are external connections enabled in SQL Server?
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- Is TCP/IP protocol enabled in SQL Server?
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- Do you have multiple instances of SQL running on that box, in which case we have to specify the instance name in the connection?
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- Can you connect externally (eg maybe tether to your phone and try connecting from outside your network in the same way we are)?