I use PiHole as my local DNS server at the IP of 192.168.0.103. some time ago i upgraded the firmware to the latest on my router and now i had to reconnect with every one of my devices after the router reboots because it keeps reverting the Primary DNS to 192.168.0.1. and when i correct it and click on save, nothing hapens. Very frustrating..

And the logs are there:

30 INFO 0days, 00:00:31, [wan]advanced ddns -wanChanged

31 INFO 0days, 00:00:31, [wan]systool sntpc -sntpRequest

32 INFO 0days, 00:00:32, [dnsproxy]Register Dns Detect

33 INFO 0days, 00:00:32, [dnsproxy]Register primary = 0x12e0254, secondary = 0x12c0254

34 ERROR 0days, 00:00:32, [inetd]INETD: select error, abort.

35 WARNING 0days, 00:00:32, [cwmp]cwmp is not start

36 WARNING 0days, 00:00:34, [dhcps]Lease host name not found.

37 INFO 0days, 00:00:42, [dhcps]Send OFFER with ip 192.168.0.110.

38 INFO 0days, 00:00:43, [dhcps]Send ACK to 192.168.0.110.

39 INFO 0days, 00:00:47, [dhcps]Send OFFER with ip 192.168.0.120.

40 INFO 0days, 00:00:47, [dhcps]Send ACK to 192.168.0.120.

I had to block every device one by one after reboot and then unblock every one to automatically assign the correct DNS address.