Hi. The issue just might be external, but I am willing to give it a try
Setup is on RPI 3 with Raspbian. Running Windows 7 machine with DNS configuration directly on it.
Router: Ubee EVW3226_1.0.16
eth0 Link encap:Ethernet HWaddr b8:27:eb:4f:b1:3e
inet addr:192.168.0.250 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::c28a:e52a:7e66:df01/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10029 errors:0 dropped:50 overruns:0 frame:0
TX packets:8650 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:1168402 (1.1 MiB) TX bytes:3419251 (3.2 MiB)
I want to move DNS config to the router according to How do I configure my devices to use Pi-hole as their DNS server? . Unfortunately, the router does not recognise RPI IP as valid thus not allowing to change DNS to RPI.
Entering DNS: https://ibb.co/fVQpt5
Pressing Save: https://ibb.co/fZMvY5
Changing to publicly available DNS (like 22.214.171.124) or to basic config (192.168.0.1) doesnt generate that problem.
Anyone had any problems like mine?
I am stil to try managing DHCP through pihole, but I dont really like the risk of being cut out and forced to hardreset the router.
I have raised this issue on github. One user suggested that the router simply doesnt accept internal adresses as DNS servers. (https://github.com/pi-hole/pi-hole/issues/1411)