mirror of
https://github.com/M66B/NetGuard.git
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113 lines
4.2 KiB
Markdown
113 lines
4.2 KiB
Markdown
# 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
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--------
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* No root required
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* Simple to use
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* Free of charge
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* Open source
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* No extra battery usage
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* No calling home
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* No tracking or analytics
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* No ads
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NetGuard doesn't even require the *internet* permission!
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Usage
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-----
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* Enable the firewall using the switch in the action bar
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* Allow/deny WiFi/mobile internet access using the icons at the right side of the application list
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Permissions
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-----------
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* ACCESS_NETWORK_STATE: to check if the device is connected to the internet through WiFi
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* RECEIVE_BOOT_COMPLETED: to start the firewall when starting the device
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Frequently Asked Questions (FAQ)
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--------------------------------
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<a name="FAQ1"></a>
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**(1) Can NetGuard completely protect my privacy?**
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No - nothing can completely protect your privacy.
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NetGuard will do its best, but it is limited by the fact it must use the VPN service.
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This is the trade-off required to make a firewall which does not require root access.
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Since the firewall must momentarily be turned off to update rules, and it only starts when Android "allows" it to start,
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it will not offer 100% protection against an application connecting to the internet.
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It will, however, be much better than nothing, especially if you are not rebooting often.
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If you want to protect yourself more, you can (at least in theory) disable WiFi and mobile data before rebooting,
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and only enable them on reboot, after the firewall service has started (and the small key icon is visible in the status bar).
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Thanks @[pulser](https://github.com/pulser/)
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<a name="FAQ2"></a>
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**(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, and Android allows only one application at a time to use this service.
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<a name="FAQ3"></a>
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**(3) Can I use NetGuard on any Android version?**
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No, because the method [addDisallowedApplication](http://developer.android.com/reference/android/net/VpnService.Builder.html#addDisallowedApplication(java.lang.String))
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is being used, the minimum required Android version is 5.0 (Lollipop).
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<a name="FAQ4"></a>
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**(4) Will NetGuard use extra battery power?**
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No, unlike most of the similar closed source alternatives.
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Support
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-------
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* Questions: please [use this XDA-Developers forum thread](http://forum.xda-developers.com/showthread.php?t=3233012)
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* Feature requests and bugs: please [report an issue on GitHub](https://github.com/M66B/NetGuard/issues/new)
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Please do not use GitHub for questions.
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Contributing
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------------
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Translations:
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* Translations to other languages are welcomed
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* 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
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* Copy [this file](https://github.com/M66B/NetGuard/blob/master/app/src/main/res/values/strings.xml) to the correct locale folder
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* Translate the strings in the copied file and omit all lines with **translatable="false"**
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* Create a [pull request on GitHub](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.
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License
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-------
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[GNU General Public License version 3](http://www.gnu.org/licenses/gpl.txt)
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Copyright (c) 2015 Marcel Bokhorst ([M66B](http://forum.xda-developers.com/member.php?u=2799345))
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All rights reserved
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This file is part of NetGuard.
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NetGuard is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your discretion) any later version.
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NetGuard is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with NetGuard. If not, see [http://www.gnu.org/licenses/](http://www.gnu.org/licenses/).
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