DNS problem with proxy

Hello, happy Friday.
I’m having a problem using proxy and DNS. I currently have a router with VPN to give me more privacy and to bypass my ISP’s blocks, the problem is that with proxies I can’t get them to change my DNS. I can use the proxy IP but I can’t get it to change the DNS… I’ve already tried with the windows tool, with proxifier, with the browser itself… does anyone have a solution for this problem? The web pages detect my DNS from a foreign country and from a privacy service and give me problems.
Thank you very much everyone and sorry if my English is not good.

Try Cloudflare WARP Software
https://1111-releases.cloudflareclient.com/windows/Cloudflare_WARP_Release-x64.msihttps://1.1.1.1/

Wilson Grant Fisk said:

Try Cloudflare WARP Software
https://1111-releases.cloudflareclient.com/windows/Cloudflare_WARP_Release-x64.msihttps://1.1.1.1/

Click to expand...

I tried it. In local mode without being in a proxy it changes the IP to that of cloudflare and the DNS too, if I indicate that it only manages the dns (1.1.1.1) it doesn’t do it. The worrying thing is that using anti-detect it doesn’t change the dns either using warp or only 1.1.1.1 mode.
Thank you very much for taking the time to respond.

This sounds like an ISP issue.
https://www.google.com/search?q=isp+hijack+dnsThey are probably/possibly using DPI (Deep Packet Inspection)
https://www.google.com/search?q=isp+dns+deep+packet+inspectionThere are some tools to circumvent/bypass DPI, not sure if they will help.
https://www.google.com/search?q=Deep+packet+inspection+bypasshttps://www.google.com/search?q=circumvent+dpi
I am not sure if an OpenWrt router might help
https://www.google.com/search?q=openwrt+dns
Or try this
https://www.google.com/search?q=DNS-over-HTTPS+service

Just found these, looks promising
https://dnsprivacy.org/dns_privacy_clients/
If you do try it, please let me know how you get on.

OP give this a try https://simplednscrypt.org/
and this https://yogadns.com/

You could try and flush your DNS. I've had this issue in the past

You have to send HOSTNAMES to the proxy. Don't resolve them locally. Any other DNS resolution method causes DNS leak.
Also make sure your proxies are good in terms of DNS. Some low quality proxies uses Google DNS which is not OK. Proxy must use DNS of its provider (resi or 4g), but you can't fix it.

Yeah, that's a little odd. The DNS should resolve automatically when you apply the proxy. Check the proxy's quality and type, like mobile proxies won't give you that kind of problem after the most basic application on the device settings or even third party software.