It is optional to choose clone client MAC or generate MAC randomly
4.8.6 Self-defined DNS server
Click 'more setting', then click "Self-defined DNS server", showing as below:
DNS re-binding attack protection: on/off is optional, default on
DNS settings for All Clients: on/off is optional, default off
DNS over TLS of Cloud flare: on/off is optional, default off
Manual DNS server setting: on/off is optional, default off
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