# Pihole stopped working

**URL:** <https://discourse.pi-hole.net/t/pihole-stopped-working/38733>\
**Category:** Help\
**Created:** [September 25, 2020, 5:34pm UTC](https://discourse.pi-hole.net/t/pihole-stopped-working/38733 "2020-09-25T17:34:04Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![deHakkelaar](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/dehakkelaar/32/674_2.png) [@deHakkelaar](https://discourse.pi-hole.net/u/deHakkelaar)\
**Post date:** [September 28, 2020, 1:12pm UTC](https://discourse.pi-hole.net/t/pihole-stopped-working/38733/8 "2020-09-28T13:12:28Z")

</div>

Those screenshots are from an Asus router.  
**Bucking\_Horn** is correct:

> [@Bucking\_Horn](#):
>
> Your router may offer itself or your ISP's servers via IPv6, and also some router models (like [ASUS RT-AC68](https://discourse.pi-hole.net/t/asus-ac68/18179/147)) are known to distribute themselves in addition to any custom DNS servers, no matter what you configure.

Most likely the router is also pushing its own IP address for DNS to the clients alongside the `DHCP-->DNS` setting from the screenshot.  
If want to know for sure, install `nmap` on the Pi-hole host:

`sudo apt install nmap`

And do a DHCP discovery with below replacing `<ROUTER_IP_ADDRESS>` with the actual IP:

`sudo nmap -sU -p67 --script dhcp-discover <ROUTER_IP_ADDRESS>`

If output for above one shows multiple DNS servers on the "`Domain Name Server`" line and one of them isnt Pi-hole, you cant use the Asus router with stock firmware to hand out IP details via DHCP.  
I know of below two alternatives options:

> [@Configuring the WAN DNS settings on router in light of pihole, AND UNbound running on pihole](https://discourse.pi-hole.net/t/configuring-the-wan-dns-settings-on-router-in-light-of-pihole-and-unbound-running-on-pihole/36919/3):
>
> Looks like an Asus router. Best options are: Default router WAN settings; Enable the DHCP service in Pi-hole; Disable the DHCP service on the router; Reboot a client to renew DHCP lease and test with nslookup pi.hole in a cmd prompt. [https://discourse.pi-hole.net/t/how-do-i-use-pi-holes-built-in-dhcp-server-and-why-would-i-want-to/3026](https://discourse.pi-hole.net/t/how-do-i-use-pi-holes-built-in-dhcp-server-and-why-would-i-want-to/3026) Flash the Asus stock firmware with the [Merlin](https://www.asuswrt-merlin.net/) one (if the router is on the [supported list](https://github.com/RMerl/asuswrt-merlin.ng/wiki/Supported-Devices)) and push Pi-hole's IP address through DHCP to the clients as t…

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