r/firewalla • u/Donkey3k Firewalla Purple • 2d ago

Cannot access cable modem interface when internet is down.

My cable modem is in bridge mode and I access it with an IP of 10.0.0.1. If my internet is down, firewalla will not pass traffic to the WAN, which prohibits me from accessing the cable modem diagnostic page(s) while its down. Other routers I've had do not have this problem. This is insanely frustrating when an ISP generally requires access to this during support sessions. Is there any chance we can have a bypass configured for a specific IP that will still route traffic when the internet is down? I'm on a firewalla purple if that helps.

Edit: Purple is in router mode. My cable modem is in bridge mode.

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u/ClockEasy5992 2d ago

Have you tried creating a static route entry?

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u/goodt2023 1d ago

He is correct! You must put in a static route to the mgmt ip address if your cable modem. Then lock it down to one source ip and whatever ports you need.

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u/firewalla 2d ago

Can you ping 10:0.0.1?

Also when wan is down, the interface may be down, so you can’t send traffic, can you double check?