Ideal setup guide with ISP Router + Openwrt (rpi4) + WiFi -AP

Installing and Using OpenWrt Network and Wireless Configuration
1

I have a strange question regarding DHCP server on Rpi4(Openwrt installed)
I am connecting Telekom router + rpi4(openwrt)+ Xiaomi Ax3600(as Access-Point for WiFi)
What I want to ask is how should I setup the DHCP server so that I have 0 issues in blocking ads and also in terms of IP address conflict.
How should I proceed further? I mean should I setup static dns Address in my Router and let rpi4 manage DHCP server and the Xiaomi Ax3600 in AP-Mode?

Is this setup correct? If so how can I do the DHCP setting in openwrt??? Can I switch off the DHCP server on Telekom router? Will it work if I do so?

Hoping to get a reply soon.

I also have an idea of print my ISP router in pure modem function (bridging mode). If I do so, will my rpi4(with 192.168.1.1 IP Address) continue to work without failure and will it act as DHCP server?

If yes, please guide me where to find a guide to do it. I searched online for long, but couldn't find a perfect solution for my problem.

Thanks in advance

2

Sorry, I have not understood your requirements, I will write common considerations.

Router creates NAT, so additional LAN network with virtual IP addresses exists.

In your case you should decide, what to do:

  1. RPi is 'second' router, creating additional LAN (DHCP server on it works).
  2. RPi is dumb AP, so it just connects interfaces via bridge (No DHCP, no routing).
3

Thanks for your time, i didnt know myself on how to frame this Question to ask my Problem.
According to your suggestion i wanted to have the 1st Setup.

That means i want my RPi to do the DHCP Server function of assigning IP Address to all the Devices. that means i dont want to have 2 DHCP Servers running for the single Internet to block ads and stop malicious attackes.

I want to know can i create my own IP Address with DHCP Function on Rpi ? if yes how ?
if i leave the default router setting on my ISP Router, it also has its own DHCP server. That is what i mean to switch off and get this function only from Rpi. by the way i dont want the WiFi capability of Rpi. For this purpose i have Xiaomi AX3600 as WiFi in AP-Mode setup....

ISP-Router - > Rpi(DHCP-Server) ->>XiaomiAX3600(as WiFi-Router in AP-Mode).

i hope i have made my situation and problems little bit clear. All i am concerned is about blocking ads if 2 DHCP Servers kept running on a single Network, then the Adblocking Function will not be 100% effective... Thats my only concern...

Hoping for a reply.

4

It is worth stating that DHCP does not have anything to do with Adblock. Typically, ad-blocking is done with DNS, which is a separate function. Your DHCP server will simply advertise what DNS servers are desired for the client devices to use.

5

Thanks for your reply. Till now I was under the impression that only one ip address series in a network needed to block the ads 100%

I also want to know how I can change the ip address of rpi4? And subsequent Device IPs?