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# NetGuard
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NetGuard is possibly the first free and open source no root firewall for Android.
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< img src = "screenshot.png" width = "232" height = "371" hspace = "4" / >
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Features
--------
* No root required
* Simple to use
* Free and open source
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* No extra battery usage
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* No calling home
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* No tracking (analytics)
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* No ads
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NetGuard doesn't even require internet permission.
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Usage
-----
* Enable the firewall using the switch in the action bar
* Allow/deny Wi-FI/mobile internet access using the icons at the right side of the application list
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Permissions
-----------
* ACCESS_NETWORK_STATE: to check if the device is connected to the internet through Wi-Fi
* RECEIVE_BOOT_COMPLETED: to start the firewall when starting the device
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Frequently asked questions
--------------------------
< a name = "FAQ1" > < / a >
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**(1) Can NetGuard protect my privacy?**
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Not really, since the firewall cannot be started right after starting your device
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and because updating firewall rules require momentarily turning off the firewall.
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< a name = "FAQ2" > < / a >
**(2) Can I use VPN applications while using NetGuard?**
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If the VPN application is using the [VPN service ](http://developer.android.com/reference/android/net/VpnService.html ),
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then no, because NetGuard needs to use this service too and Android allows this to just one application at a time.
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< a name = "FAQ3" > < / a >
**(3) Can I use NetGuard on any Android version?**
No, because the method [addDisallowedApplication ](http://developer.android.com/reference/android/net/VpnService.Builder.html#addDisallowedApplication(java.lang.String ))
is being used the minimum required Android version is 5.0 (Lollipop).
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< a name = "FAQ4" > < / a >
**(4) Will NetGuard use extra battery power?**
No, unlike most of the similar closed source alternatives.
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Support
-------
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* Questions: please [use this forum ](http://forum.xda-developers.com/showthread.php?t=3233012 )
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* Feature requests and bugs: please [report an issue ](https://github.com/M66B/NetGuard/issues/new )
Please do not use GitHub for questions.
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Contributing
------------
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Translations:
* Translations to other languages are welcomed
* Check if the language [is supported by Android ](http://stackoverflow.com/questions/7973023/what-is-the-list-of-supported-languages-locales-on-android ) and find its locale
* Copy [this file ](https://github.com/M66B/NetGuard/blob/master/app/src/main/res/values/strings.xml ) to the correct locale folder
* Translate the strings in the copied file and omit all lines with **translatable="false"**
* Create a [pull request ](https://help.github.com/articles/using-pull-requests ) for the new/updated translation
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Please note that you agree to the license below by contributing, including the copyright.
License
-------
[GNU General Public License version 3 ](http://www.gnu.org/licenses/gpl.txt )
Copyright (c) 2015 Marcel Bokhorst ([M66B](http://forum.xda-developers.com/member.php?u=2799345))
All rights reserved
This file is part of NetGuard.
NetGuard is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your discretion) any later version.
NetGuard is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with NetGuard. If not, see [http://www.gnu.org/licenses/ ](http://www.gnu.org/licenses/ ).
