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mcbainpc
Aspirant

How do I flush the DNS cache on my Orbi system?

Hello, I am running an RBR50 with FW V2.5.1.8 and I've added a pi-hole machine to my network. Now I'd like to flush the DNS cache of the Orbi system so it must fetch all entries from the pi-hole box.

 

How can I flush the DNS cache of my router?  Thanks!

Model: RBR50|Orbi AC3000 Tri-band WiFi Router
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CrimpOn
Sensei

Re: How do I flush the DNS cache on my Orbi system?

As @FURRYe38 mentioned, the most obvious step is to reboot the router.  Orbi is built on the OpenWRT project.  I found this answer about flushing the DNS cache on it: https://unix.stackexchange.com/questions/8160/how-to-clear-dns-cache-on-dd-wrt 

 

In addition, DNS cache entries "time out".  This is an internet requirement in case some resource changes IP addresses.  So, no matter where Orbi got a DNS entry, it will eventually time out and the next time a device ask, it will come from the Pi-hole.

I love my Orbi.

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FURRYe38
Guru

Re: How do I flush the DNS cache on my Orbi system?

Does rebooting the RBR do this? 

 

My Setup (Cable 1Gbps/50Mbps)>CM1200 v2.02.03(LAG Disabled)>RBK853 v3.2.17.12
RBK50 v2.7.2.104(WW) Circle Enabled
Additional NG HW: C7800/CM1100/CAX80/CM2000, Orbi CBK40, R7800, R7960P, EX7500/EX7700, XR450 and WNHDE111
Message 2 of 4
CrimpOn
Sensei

Re: How do I flush the DNS cache on my Orbi system?

As @FURRYe38 mentioned, the most obvious step is to reboot the router.  Orbi is built on the OpenWRT project.  I found this answer about flushing the DNS cache on it: https://unix.stackexchange.com/questions/8160/how-to-clear-dns-cache-on-dd-wrt 

 

In addition, DNS cache entries "time out".  This is an internet requirement in case some resource changes IP addresses.  So, no matter where Orbi got a DNS entry, it will eventually time out and the next time a device ask, it will come from the Pi-hole.

I love my Orbi.

View solution in original post

Message 3 of 4
mcbainpc
Aspirant

Re: How do I flush the DNS cache on my Orbi system?

Thank you for the excellent response.

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