How to Understand External Servers and Services Accessed by Firmware
Some of the system services in the terminal will access some external services (IP port):
| Service | Domain Name or IPs | Description |
|---|---|---|
| TMS (wizarview) | www.wizarview.com | The major TMS servers: http://sdkwiki.wizarpos.com/index.php/How_many_ports_and_IP_used_by_TMS |
| 204 Pages | connectivitycheck.gstatic.com www.google.com www.qualcom.com |
Android system will touch an empty 204 HTTP(S) page from those location to check the internet connectivity. Usually it use port 80 and 443. For example: http://connectivitycheck.gstatic.com/generate_204 |
| A-GPS Location Services | location.services.mozilla.com locprod2-elb-us-west-2.prod.mozaws.net xtrapath2.xboxprod.izatcloud.net |
The first 2 is belong to micro-g project. The 3rd one is belong to Qualcomm. TMS agent will use these service to get the GPS information. But this can be disabled by TMS agent configuration. |
| NTP Services | asia.pool.ntp.org (old default) 2.android.pool.ntp.org (new default from aosp) cn.pool.ntp.org (redundancy backup) hk.pool.ntp.org (redundancy backup) |
Android system will use these server to automaticly adjustment time, when the system is set as "AutoTime". Usually they use UDP port 123 |