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Can't connect to firewalla from one Windows device

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Rob Abbott

Hi, not sure if this is a firewalla issue or something stupid with Windows.

 

I have a FWG which I just recently switched from DHCP to Router mode.  A day or so after I changed to router mode, I found I was unable to SSH in to the FWG from my Windows 10 desktop.

 

The FWG is the gateway for my LAN on 192.168.1.1.  The Windows machine can see the internet.  It can ping 192.168.1.1.  But I cannot connect to any port on 192.168.1.1 from the Windows machine.  I get "connect failed".

I fired up Wireshark and when I attempt to connect to 192.168.1.1:22, I see zero traffic leaving the Windows machine.  Attempts to connect to other ports at 192.168.1.1 also show zero traffic out.  I do see traffic if I try to connect to port 22 on another device.  Remember that I can connect to the internet, which is going through the FWG, and ping also functions.

I've disabled the Windows Defender firewall.  No luck.

I can SSH in to the FWG from other devices on the network - iOS, Mac, Linux, etc.

Is this some strange routing issue?

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    Rob Abbott

    Some other data points, the network topology looks like this

    (FiOS ONT) --eth--> FWG --eth--> switch --eth--> windows 

     

    Windows gets its IP from FWG DHCP server with reserved address 192.168.1.50

     

    "route print" from windows

    IPv4 Route Table
    ===========================================================================
    Active Routes:
    Network Destination Netmask Gateway Interface Metric
    0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.50 25
    127.0.0.0 255.0.0.0 On-link 127.0.0.1 331
    127.0.0.1 255.255.255.255 On-link 127.0.0.1 331
    127.255.255.255 255.255.255.255 On-link 127.0.0.1 331
    192.168.1.0 255.255.255.0 On-link 192.168.1.1 281
    192.168.1.0 255.255.255.0 On-link 192.168.1.50 281
    192.168.1.1 255.255.255.255 On-link 192.168.1.1 281
    192.168.1.50 255.255.255.255 On-link 192.168.1.50 281
    192.168.1.255 255.255.255.255 On-link 192.168.1.1 281
    192.168.1.255 255.255.255.255 On-link 192.168.1.50 281
    224.0.0.0 240.0.0.0 On-link 127.0.0.1 331
    224.0.0.0 240.0.0.0 On-link 192.168.1.1 281
    224.0.0.0 240.0.0.0 On-link 192.168.1.50 281
    255.255.255.255 255.255.255.255 On-link 127.0.0.1 331
    255.255.255.255 255.255.255.255 On-link 192.168.1.1 281
    255.255.255.255 255.255.255.255 On-link 192.168.1.50 281
    ===========================================================================
    Persistent Routes:
    None

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    Firewalla

    Can you check your windows firewall and see if it is blocking anything?

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    Rob Abbott

    I turned off the Windows firewall.  It's very strange.

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    Rob Abbott

    Well, it was definitely windows being stupid.  I think it was an unused but misbehaving VPN client.  I reset the network settings and deleted several VPN related network adapters and it's working now.

     

    Hooray for FWG VPN client :)

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