Category Archives: Android

Posts related to any “Android” device.

Setup your own DNS over TLS

So I have gone a little crazy lately in my home lab. I have created a anycast address in the LAN of 10.10.10.10 that goes to the nearest pihole. (Local, Datacetner 1 or Datacenter 2)  While that was nice I still wanted a way to have pihole while on the go.  I thought about a VPN, that works but is not perfect for what I want.  A little more pondering and I found that Android 9 supports “Private DNS”.  Turns out that it is a simply DNS over TLS. (DoT)  That just makes this so much easier now.

How does one make a DoT server then?  Again answer is really simple, stunnel4 is all you need.  A quick bit of googling will get you to this page, which will walk through a more indepth setup of stunnel4.  Boiled down, and assuming you have a SSL cert handy/installed on the system:

# yum install stunnel4

# cat /etc/stunnel/dnstls.conf
[dnstls]
cert = /etc/letsencrypt/live/mindlesstux.com/fullchain.pem
key = /etc/letsencrypt/live/mindlesstux.com/privkey.pem

accept = 853
connect = 10.10.10.10:53


# systemctl enable stunnel4
# systemctl start stunnel4

After that, it was a matter of punching a hole in the firewall to allow 853 in to the server running the stunnel4 daemon.  Once that was up I added a DNS record for exampledot.mindlesstux.com to the ip where the firewall hole was punched.  Finally in my android Settings -> Network & Internet -> Advanced -> Private DNS.  I set that to “Private DNS provider hostname” and put the mentioned hostname in the text field.  Bam, now anywhere I go my phone is covered by one of my piholes.

Now to look into providing DNS over HTTPS (DOH) the same way…

Reference URL: https://kb.isc.org/docs/aa-01386
Reference URL: https://en.wikipedia.org/wiki/DNS_over_TLS
Reference URL: https://android-developers.googleblog.com/2018/04/dns-over-tls-support-in-android-p.html

Disable Add App Icon To Home Screen

The newer version of the play store on Android phones moved the check box from what I would call a ideal location to one that while makes sense is the last place I would check.

For my personal note and anyone that find this:

Home screen, press hold
Settings
Scroll to bottom, toggle 'Add icon to Home screen'
Reference URL: https://www.addictivetips.com/android/disable-add-app-icon-to-home-screen/

Nexus 6P: Turn on WiFi Automatically

I use a Nexus 6P as my day to day driver despite my phone having the early shutdown bug with the battery.  (Currently working on getting an RMA, come on google I am at 4wks now waiting for outbound shipment.)  I stumbled upon something that I just wanted to bookmark for use just in case I ever needed to find this again.  Instead of a regular bookmark I figured it would be better if I made a public posting and linked the original artical.

adb shell
settings put global wifi_wakeup_available 1
settings put global wifi_wakeup_enabled 1
Reference URL: https://www.xda-developers.com/turn-on-wifi-automatically-nexus5x-nexus6p/