Hi,
I am coding a system application which offers web-filtering on Android devices. Global web-filtering is a headache (if not specific browser based) but I am managing to do it by means of a Proxy server hosted on the device itself.
The idea is to change programmatically the Proxy settings of the device (when connected to a WIFI connection) and point towards the internal Proxy server. So far so good.
My question relies on what is affected by changing the Proxy settings. All browsers are denied access if the Proxy server is not running, which is great. However Email applications still receive/send e-mails, as well as FTP Clients can still connect to an FTP Server and modify files remotely. How is this possible? Does the Android Proxy settings only apply to HTTP/HTTPS requests?
Are all other protocol requests going out/in the device ignoring the Proxy settings?
Thanks!
pejT
I am coding a system application which offers web-filtering on Android devices. Global web-filtering is a headache (if not specific browser based) but I am managing to do it by means of a Proxy server hosted on the device itself.
The idea is to change programmatically the Proxy settings of the device (when connected to a WIFI connection) and point towards the internal Proxy server. So far so good.
My question relies on what is affected by changing the Proxy settings. All browsers are denied access if the Proxy server is not running, which is great. However Email applications still receive/send e-mails, as well as FTP Clients can still connect to an FTP Server and modify files remotely. How is this possible? Does the Android Proxy settings only apply to HTTP/HTTPS requests?
Are all other protocol requests going out/in the device ignoring the Proxy settings?
Thanks!
pejT