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Windows 10 firewall stops connections even when inbound/outbound connections both are set to Allow RRS feed

  • Question

  • Hi guys,

    I have been using Windows firewall(currently Win10 - 1809) for a long time on several computers.  I normally have it set enabled on all profiles,with a block on both Inbound and Ountbound connections.  Then I go through and add in rules for any communication I want to allow to go outbound.  This was all working fine for my computer and in the past few weeks everything broke.  Now on this computer, if I set the correct profile to "On" and both Inbound and Outbound to Allow communication nothing will not work.  Even a simple ping(I normally allow ICMP) to 8.8.8.8 will fail with FW state ON, and both connections set to "Allow"  If I turn the FW state to "Off" then the ICMP starts going through.  I am copying the log below, but does anyone have any ideas on how to troubleshoot?  Normally everything works fine even when I have both connections set to "Block" as long as I have the correct rules added.  I did install Windows updates recently, but not sure if that caused it or not.

    2019-02-09 19:43:25 DROP UDP 10.1.10.225 10.1.10.255 137 137 0 - - - - - - - SEND
    2019-02-09 19:43:25 DROP ICMP 10.1.10.225 8.8.8.8 - - 0 - - - - 8 0 - SEND
    2019-02-09 19:43:26 DROP UDP 10.1.10.225 10.1.10.255 137 137 0 - - - - - - - SEND
    2019-02-09 19:43:26 DROP UDP 10.1.10.225 75.75.75.75 63559 53 0 - - - - - - - SEND
    2019-02-09 19:43:26 DROP UDP 10.1.10.225 75.75.76.76 63559 53 0 - - - - - - - SEND
    2019-02-09 19:43:26 DROP ICMP 10.1.10.225 8.8.8.8 - - 0 - - - - 8 0 - SEND
    2019-02-09 19:43:27 DROP ICMP 10.1.10.225 8.8.8.8 - - 0 - - - - 8 0 - SEND


    Dave


    • Edited by DaveBryan37 Sunday, February 10, 2019 3:00 AM
    Sunday, February 10, 2019 3:00 AM

Answers

  • A windows update for 1809 fixed my problem immediately, after reboot.  I think it was KB4487044, but it could have been KB4483452

    Dave


    • Marked as answer by DaveBryan37 Friday, February 22, 2019 5:02 AM
    • Edited by DaveBryan37 Friday, February 22, 2019 5:02 AM
    Friday, February 22, 2019 5:02 AM

All replies

  • Hi Dave,

    Inbound connections to programs are blocked unless they are on the allowed list. Outbound connections are not blocked if they do not match a rule.

    Firstly, turning on IPv6 protocol in network adapter settings.

    Check the following case for detailed information.

    Windows 10 Private Firewall Blocks All Internet Traffic

    https://superuser.com/questions/1335258/windows-10-private-firewall-blocks-all-internet-traffic

    Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    Regards


    Please remember to mark the replies as answers if they help.
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    Monday, February 11, 2019 2:25 AM
    Moderator
  • Does anyone have any ideas?  IPv6 is enabled and this was working fine in the past and I have used Windows Firewall for a long time on multiple computers.  Now the firewall must be "Off" for any traffic to work.  If the firewall is "On" and both inbound/outbound set to "Allow" it immediately stops working.  It might have started around the time of updating to 1809, but not sure

    Dave




    • Edited by DaveBryan37 Friday, February 22, 2019 4:44 AM
    Friday, February 22, 2019 4:36 AM
  • A windows update for 1809 fixed my problem immediately, after reboot.  I think it was KB4487044, but it could have been KB4483452

    Dave


    • Marked as answer by DaveBryan37 Friday, February 22, 2019 5:02 AM
    • Edited by DaveBryan37 Friday, February 22, 2019 5:02 AM
    Friday, February 22, 2019 5:02 AM