Firewalla Won't Monitor iPhone

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Matt Smith

• March 06, 2024 22:58

I have a Firewalla Blue. Even with MAC randomization turned off, Firewall suddenly won't monitor my son's iPhone. The phone is picking up an IP address from the cable modem instead of Firewalla, thus FW's inability to monitor the phone. No amount of rebooting FW, the phone, turning MAC randomization on/off on the phone, turning WiFi off/on on the phone... none of that has helped. I even deleted the phone from the list of devices, didn't help. Oddly, it didn't put the phone into quarantine... it's like he has some kind of Level 8 Supreme Phone of Accessibility. This kid's an Eagle Scout, so he's not trying to pull anything... he was trying to help diagnose!

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  Firewalla

  • March 06, 2024 23:15

  Is this the original blue unit? Are you running DHCP mode or Simple mode? 

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  Matt Smith

  • March 07, 2024 00:17

  Blue Plus running version 1.9780. DHCP mode.

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  Firewalla

  • March 07, 2024 00:43

  Your iPhone gateway should be pointing to the Blue+ IP address. Is that what you have on kid phone?

  If you tap on devices and search for kid's phone, tap on that and then tap on network flows, do you see anything there?

  If you just block kid device, does it still work?

   

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  Matt Smith

  • March 07, 2024 13:41

  Blocking the device does not work. No network flows. iPhone's router address is the cable modem's address, not Firewalla.

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  Firewalla

  • March 07, 2024 16:39

  Is your cable modem still has DHCP on? or does your phone, hard code the gateway to the modem?

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  Matt Smith

  • March 07, 2024 18:20

  Sorry... I've been saying Cable Modem, but I should've been saying WiFi router, but maybe that distinction isn't important. The WiFi router has DHCP turned on--should it be turned off? If I turn off DHCP on the router, how will devices get an IP address if monitoring is turned off in FW for those devices?

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  Firewalla

  • March 07, 2024 20:17

  If you are using DHCP mode, you should turn off WiFi's DHCP. If monitoring is off, firewalla will issue them an IP with gateway as your main router. 

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  mozarella

  • March 09, 2024 06:09

  Within a network, there should only be one DHCP at the same time. Because devices ask per broadcast if there's an DHCP-server running and asking for getting IP-address. So you can't decide which DHCP-server will offer IPs to the devices.

  So devices will get IP-address from wifi router's DHCP or firewalla's DHCP. So it's better to turn one of them off.

  i'm using firewalla blue in simple mode, because i'm using another dhcp-server with reservations and it's also running dns (dnsmasq). I'm also running pi-hole so i prefer to use self configurated dhcp. So i don't use DHCP built in firewalla and also not router's DHCP-server.

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  Daemoch

  • March 20, 2024 21:40

  Re-reading, and not having the Blue myself (I run Golds), its possible you have 3 DHCPs in play: Cable-modem, wifi-router, and FW Blue.

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