By default, Windows Defender Firewall blocks inbound connections, preventing Corellium devices from establishing a connection to a VPN-connected Windows computer. This prevents proxies, like Burp, from working, because the VM instance must be configured to proxy its traffic through the VPN-connected Windows computer.

To add a Firewall rule to allow network traffic originating from Corellium, on Windows 7, follow these steps:

Open Windows Defender Firewall.

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Click Advanced Settings on the left-hand side.

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Click Inbound Rules on the left-hand side.

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Click New Rule... on the right-hand side. The New Inbound Rule Wizard will appear.

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Click the Custom radio button, and then click Next.

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Click Next.

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Click Next.

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Click the These IP addresses radio button below Which local IP addresses does this rule apply to?.

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Enter 10.11.3.0/22, the VPN subnet. Then click OK.

Then click the These IP addresses radio button below Which remote IP addresses does this rule apply to? and enter 10.11.0.0/15, the Corellium VM instance subnet.

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Click Next.

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Click Next.

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Click Next.

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Name the rule, and then click Finish.

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You should now be able to establish connections from a Corellium VM instance to your VPN-connected client.

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