Internet Issues - Firewalla Blue plus behind Unifi Dream Machine Pro

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Christian Osswald

• July 30, 2022 17:58
• Edited

Hey folks,

i just received my Firewalla Blue Plus and added it my network in simple mode (attached to a Unifi managed switch that is directly attached to the UDM). FWIW i´m also using a Pi-Hole with unbound for my DNS needs.
To my dismay it´s immediately causing issues. It makes my Internet drop out intermittently. Every 2-20 Minutes i will have short internet outages that i can see on a client constantly pinging the google DNS as well as on the Firewalla Network Performance Log.
There it shows as Internet Disconnected and Internet Restored. The outages range from 30 seconds to 1 minute.
When i remove the Firewalla, everything is back to normal again.

Things i´ve tried so far: removed all Unifi Switches and APs from monitoring. Didn´t help though.

Any ideas?

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  Firewalla

  • July 31, 2022 00:47
  • Edited

  If you turn off your pi-hole, just use default from your ISP, do you still have a stable internet? can you turn off monitoring on these things (tap devices->[find access point, switch]->tap on them->turn monitoring off) <= this trick is ONLY for SIMPLE mode

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  Christian Osswald

  • August 04, 2022 08:43
  • Edited

  Reset the Firewalla to defaults and gave it a new IP as well.
  Config is completeley standard now, with the exception that i removed ALL Unifi devices (APs & Switches) + the Pi-Hole/Adguard from monitoring. Still getting intermittent outages.
  What i now just realized is that, when this happens, also the Firewalla is not reachable for these brief moments.
  constant ping to google.com on the left, constant ping to the Firewalla on the right. These timeouts always align perfectly.
  

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  Christian Osswald

  • August 12, 2022 21:44

  I have now removed the Pi-Hole from the equation and let my Router handle DNS.
  Issue remains. I even reflashed and reconfigured the Firewalla from scratch (disabled monitoring for all APs as well).
  I´m at a loss now.

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  Firewalla

  • August 13, 2022 04:13

  Are you running in simple mode? if you are, see some tips here https://firewalla.com/compatibility

   

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  Christian Osswald

  • August 14, 2022 15:49

  Indeed, running in simple mode.
  Checked the compatibility article:
  * My router is a Ubiquiti Unifi Dream Machine (Pro) which is listed as compatible with both modes, with no notes.
  * I don´t have network extenders that randomize
  * I do run managed Unifi switches and APs. Disabled monitoring in Firewalla for all of them
  * IPv6 is disabled for this network (IPv6 Interface type = none, in the Unifi config for this network)
  * Network is a /24
  * No Guest networks are defined
  
  
  I do have a client with Bitdefender on the network and disabled the port scan protection on this.
  However, the issue persists. Even when this client is offline.
  I don´t run any of the other devices mentioned under "compatibility with other devices"
  
  

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  Firewalla

  • August 14, 2022 17:14

  I created a ticket for you, will ask some one to look at this.

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