CIS Firewall block Windows Sandox Internet connection

Comodo Internet Security - CIS
1

CIS 12.3.3.8140 (2025 premium)
I use often the Windows Sanbox on Windows 11 Pro 23H2 and Comodo Firewall often lock the Internet connection on the Windows Sandbox.

For be able to surf on the sandbox I need always deactivate completely the Comodo Firewall.

Somestimes connection are locked as soon the Windows Sandbox is lunched, sometimes you need open, use the Windows sandbox, close and open again to see the issue.

I tried other firewall product but it doesn’t give this issue, is just Comodo that force me to deactivate the Comodo Firewall to be able to surf on the Windows sandbox.

I hope in a fix soon.

1 Like
2

Hi peopleinside,

Thank you for reporting.
We will check and report this to the team.

Thanks
C.O.M.O.D.O RT

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I hope you can release a fix soon about this.
Thanks

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Comodo Firewall often blocks Windows Sandbox for me too. Try adding an exception for the sandbox in Comodo’s settings or use a different firewall temporarily.