Windows Firewall - Block all incoming connections - Breaks IPv6

Last Modified: Wed, 14 Jun 2017 03:24:59 +0000 ; Created: Wed, 14 Jun 2017 03:24:59 +0000

Customize settings for Windows Firewall with Block all incoming connections, including those in the list of allowed apps

Transmit from the Windows system some IPv6 packets

ping -t -6 *(or your router even)*
Notice that the packets get dropped.

Now, disable the Windows Firewall and you get responses.

A bug in Microsoft Windows 7 & 10 code it would appear. It fails to handle packets (tested both DNS and ICMP) originating from the Windows system going out.

Using IPv4 everything works fine.