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I would like to make an Android device as hotspot. I will put it in my roof so it will receive vetther signal, and turn in its hotspot. I want to make that hotspot accessable by certain devices only by register their MAC adress at the hotspot device.

How can I do it? I don't see any option in the hotspot setting so I can do it.

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  • Android uses dnsmasq as DHCP server to assign IP addresses to connected devices. You can create /etc/dnsmasq.conf and ignore certain MAC addresses, assign fixed IP for certain MAC addresses, limit the range of IP addresses etc. – Irfan Latif Feb 16 '19 at 7:28
  • I will use that hotspot in an office, which some people with mobile device will be used to access i ternet. So I will allow certain people only to access. But however, those people will come and go. If I have to assign the IP, will be very uneffective. So, limiting the access by MAC is the best. – AirCraft Lover Feb 16 '19 at 8:05
  • Yeah you can do that with dnsmasq.conf, but you need root access to modify /system partition. Also, Android doesn't use dnsmasq.conf by default, instead all options are provided on commandline. So you might need to replace /system/bin/dnsmasq binary with a custom shell script to modify those options because those are hard-coded in netd when building ROM. – Irfan Latif Feb 16 '19 at 11:35

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