Firewall blocking most internet connectivity, except MS Edge

I installed the most recent Win 10 update, and now have the most odd issue that I can't figure out. Windows Defender firewall seems to block everything except Windows Edge, from within my private home network

When the firewall is on:

• Firefox and Chrome do not work at all. Neither do internal internet functions like Windows update. For some reason, MS Edge connects to the web just fine
• From CMD, I'm able to ping 127.0.0.1 and my router (192.168.1.1), but I can't ping out (for example, 8.8.8.8). The response is just "general failure" with 100% loss.

When I switch the firewall off, everything is fine and connects without hesitation

I am only running Windows firewall, no other antivirus or firewall software. I'm connected only to the wifi router, though IPconfig shows that the Teredo Tunneling Pseudo-Interface is also running.

Looking at the configuration through Netsh, the only oddity I can see is that the Teredo service is configured as such:

set state type=client servername=win1710.ipv6.microsoft.com. servervirtualip=0.0.0.0

The only things I've done of late were the windows updates and running a new VPN client (SmartDNSProxy). I've tried to disable Teredo, and I've turned off and rebooted without the VPN running, but it doesn't seem to fix the issue. Somewhere a setting changed somewhere, and I'm going insane trying to get back to full functionality. All thanks for any sage advice.

Caledon Ken said:

My bet is you VPN software has change the firewall. I would reset the firewall.

Restore Default Windows Defender Firewall Settings in Windows 10


Ken

Thanks so much. That fixed it. (I'm typing in Firefox). I exported the firewall policy before resetting it since I'm guessing I'll need to restore some settings to get all my apps working.

Thanks for your help