Internet Traffic blocked when trying to surf in Edge Sandbox Mode (Windows Defender Application Guard)

john zuh 51 Reputation points

I have successfully activated Windows Defender Application Guard but it seems surfing in Edge Sandbox Mode has been impossible. All required gpos and addition requirements as described on here: have been configured accordingly.

I had a tip from microsoft support that my firewall could be blocking traffic (NAT)coming from the Host Computer so should allow all IP subnets in the range of 172.x.x.x or 192.x.x.x. I have tested that by allowing this traffic in the Trellix including Remote Ports 49700–65535, as described in Trellix documentation here but to no avail.

Could there be any other underlying root causes in a typical Enterprise environment where systems have been hardened using Security policies defined by CIS. What rules can be exempted here in order to allow this kind of traffic. Anybody has experience with this kind of environment or issue. Some tips will be welcomed.

Microsoft Edge
Microsoft Edge
A Microsoft cross-platform web browser that provides privacy, learning, and accessibility tools.
2,166 questions
Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
10,796 questions
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