(DNS) problems on my networks since upgrading my Cloud Gateway Ultra to Network Application 9.1.120

Ubiquiti UniFi
1

Hello,

I have a network configured with multiple VLANS. One of that VLANs is the management VLAN which contains all the Unifi devices and also an Adguardhome DNS server. I created firewall rules so the other VLANs have access to the DNS server.

On the Adguardhome DNS server I used these URLs:

https://dns.quad9.net/dns-query
https://dns.google/dns-query

This was all working fine until I upgraded my Cloud Gateway Ultra to Network Application 9.1.120.

I noticed these problems:
→ With each reboot of my Cloud Gateway Ultra, my Unifi devices get into some kind of adoption/offline loop. This I can solve by restarting my (main) switch (USW-24-POE). After the restart of the switch, every Unfi device is “online”.

→ The URLs I used in my Adguardhome configuration are not working anymore.

They can’t be resolved any longer?

→ My network devices are not longer using the Adguardhome DNS server. The DNS queries stay on zero since the upgrade of my Cloud Gateway Ultra.
(I added a DNS server into the VLAN and this is used. So it seems that they can’t reach it any longer?)

Anyone else have seen this issues? And what did you do to solve this?

2

What security options do you have enabled in your gateway?

3

All this problems seems to be caused by the “Content Filtering” that was set to “Family”. As far a I know this setting was already set for a longer time before the upgrade but since this upgrade it resulted in problems. Change the setting to “None” solved all the issues.

1 Like
4

Thanks for the update!