# On-Premise SQL Server credential requirements
There are two primary mechanisms used to connect to on-premises databases. If neither of the options below work for your organization, our integration experts will work with you to accommodate your unique circumstances.
## Option 1: Allow IPs
If your database can be reached publicly over the internet, allow these IP addresses:
From the Simon left navigation, expand sett**Admin Center** then click **Integrations**. Scroll to SQL Server and enter your credentials then click **Save Changes**.
Click **Test Connection**.
## Option 2: VPN
If your data warehouse can only be reached from your internal network, we establish a VPN connection to your network. While we can support “site-to-site” VPNs, the typical setup is to give Simon an account on your regular VPN (with a username and password) and our integration team will establish a VPN connection from there. You won't need to change anything else about your network.
We need this information from you:
Your VPN type (e.g. Cisco, AnyConnect, etc.)
Your VPN server hostname (like a URL)
A username and password created specifically for Simon to access your VPN
Your VPN routes
Forwarding rules for your VPN, including:
The IP address of the database behind the VPN
The database listening port
The database destination port
Any extra options required to connect to your VPN. For example: `
We can establish a VPN with Cisco and NetExtender VPNs within 4 hours, and work with you to establish other VPNs within 48 hours.
Once this is done, complete step 2 in option 1 above.