How to Understand External Servers and Services Accessed by Firmware
Overview
Certain system services in the terminal access external services, typically via specific IP ports.
Services List
| Service | Domain Name or IPs | Description |
|---|---|---|
| TMS (wizarview) | www.wizarview.com | The major TMS servers: Ports_and_IP_Used_by_TMS |
| 204 Pages | connectivitycheck.gstatic.com www.google.com www.qualcom.com |
These servers are used to check internet connectivity by pinging an empty HTTP(S) page (204 response), and commonly use HTTP port 80 and HTTPS port 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 two servers associated with the Micro-G project. The 3rd one server belonging to Qualcomm. TMS agent use these services for GPS data, which can be disabled through TMS agent configuration. |
| NTP Services | asia.pool.ntp.org (old default) cn.pool.ntp.org (old backup) hk.pool.ntp.org (old backup) 2.android.pool.ntp.org (new default from aosp) |
The Android system utilizes these servers for automatic time adjustment when set to 'AutoTime', and typically uses UDP port 123 for time synchronization. |