How to redirect DNS traffic to dnsmasq on Android

I’m trying filter all DNS traffic using *dnsmasq* on Android (*LineageOS*). Here is what I did (thanks to the help of @IrfanLatif): 1. I installed it using *termux*: pkg i root-repo && pkg up && pkg i dnsmasq Then: cp /data/data/com.termux/files/usr/bin/dnsmasq /system/bin/ 2. On Linux it's possible to divert traffic to dnsmasq simply by editing /etc/resolv.conf and replacing nameserver 8.8.8.8 with nameserver 127.0.0.1. But on Android there is no such file, however I can achieve the same using an iptables command (divert all DNS queries to port 5353):

/system/bin/iptables -t nat -A OUTPUT -p tcp --dport 53 -j DNAT --to-destination 127.0.0.1:5353
    /system/bin/iptables -t nat -A OUTPUT -p udp --dport 53 -j DNAT --to-destination 127.0.0.1:5353

3. I create the file /etc/dnsmasq.conf containing:

domain-needed
    bogus-priv
    no-resolv
    no-poll
    port=5353 # <<<<<<<<<<<<<<<<<<<<<<<<<<<<<< PORT
    listen-address=127.0.0.1
    no-hosts
    expand-hosts
    cache-size=500
    log-queries

    server=8.8.8.8
    server=8.8.4.4

    # Rules:
    # Test block:
    address=/bing.com/0.0.0.0

4. Now I can already start dnsmasq using the command: /system/bin/dnsmasq --pid-file --conf-file=/etc/dnsmasq.conf <&- I can also look at the logs and see that *dnsmasq* is running: logcat | grep dnsmasq

05-27 19:17:08.039  7988  7988 D dnsmasq : forwarded google.com to 8.8.8.8
    05-27 19:17:08.039  7988  7988 D dnsmasq : forwarded google.com to 8.8.4.4

But on the phone there is no internet access. This is the **first problem** I am having. 5. The **second problem** happens when I try to start dnsmasq on startup. Thanks to the input from @IrfanLatif, I flashed Magisk , and I have access to setpriv command. However, when I try to set a UID to dnsmasq:

/data/data/com.termux/files/usr/bin/setpriv --reuid=999 --regid=999 --clear-groups /system/bin/dnsmasq --pid-file --conf-file=/etc/dnsmasq.conf <&-

I get the error: dnsmasq: failed to find list of interfaces: Permission denied This is the second problem I'm having. I'm still trying to figure out what's going on. Any help from anyone will be much appreciated.