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Gitoffthelawn 2015-11-01 01:40:27 -07:00
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README.md
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@ -1,11 +1,11 @@
# NetGuard
*NetGuard* is a simple way to block access to the internet - no root required.
Applications can individually be allowed or denied access via your Wi-Fi and/or mobile connection.
Applications can individually be allowed or denied access to your WiFi and/or mobile connection.
Blocking access to the internet can help:
* save your data allowance
* reduce your data usage
* save your battery
* increase your privacy
@ -29,15 +29,15 @@ Features
* No tracking or analytics
* No ads
* IPv4/IPv6 TCP/UDP supported
* Block both system and user applications
* Block system and user applications
NetGuard doesn't even require *internet* permission.
NetGuard does not even require the *internet* permission.
NetGuard is possibly the first free and open source no-root firewall for Android.
Most of these features are the result of sending selected traffic to a sinkhole, instead of filtering all internet traffic.
This means that advanced features, like address based filtering (needed for ad blocking), traffic logging and on demand configuration, are not possible.
This means that advanced features, like address based filtering (needed for ad blocking), traffic logging, and on-demand configuration, are not possible.
Routing selected traffic into a sinkhole relies on an API introduced in Android 5.0 (Lollipop),
so older Android versions can unfortunately not be supported.
therefore older Android versions can unfortunately not be supported.
Usage
-----
@ -49,7 +49,7 @@ Permissions
-----------
* ACCESS_NETWORK_STATE: to check if the device is connected to the internet through WiFi
* RECEIVE_BOOT_COMPLETED: to start the firewall when starting the device
* RECEIVE_BOOT_COMPLETED: to start the firewall when booting the device
Compatibility
-------------
@ -87,8 +87,8 @@ then no, because NetGuard needs to use this service, and Android allows only one
<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).
No, because NetGuard uses the [addDisallowedApplication](http://developer.android.com/reference/android/net/VpnService.Builder.html#addDisallowedApplication(java.lang.String))
method, the minimum required Android version is 5.0 (Lollipop).
<a name="FAQ4"></a>
**(4) Will NetGuard use extra battery power?**
@ -99,25 +99,24 @@ No, unlike most of the similar closed source alternatives.
**(5) Can you add selective allowing/blocking applications/IP addresses?**
Unfortunately this is not possible without using significant battery power
and adding a lot of complex code to do network translation from OSI layer 3 to layer 4
and adding complex code to do network translation from OSI layer 3 to layer 4
(and thus implementing a TCP/IP stack), which will inevitably introduce bugs as well.
This is how most (all?) other no root firewalls work.
This is how most (all?) other no-root firewalls work.
NetGuard is unique, because it doesn't implement a TCP/IP stack and is therefore both highly efficient and simple.
For more advanced use cases, while not sacrificing battery usage,
rooting your device and using a iptables based firewall,
like [AFWall+](https://github.com/ukanth/afwall) might be a better option.
For more advanced use cases, rooting your device and using an iptables based firewall,
like [AFWall+](https://github.com/ukanth/afwall) might be a better option, and will not sacrifice any battery power.
<a name="FAQ6"></a>
**(6) Will NetGuard send my internet traffic to an external (VPN) server?**
No, it even can't, because NetGuard has no *internet* permission.
No. It cannot even do this, because NetGuard does not even have the *internet* permission.
<a name="FAQ7"></a>
**(7) Why are applications without internet access shown?**
**(7) Why are applications without internet permission shown?**
Internet permission can be granted with each application update without user consent.
Not filtering applications without internet access allows you to block internet access before such an update occurs.
By showing all applications, NetGuard allows you to block internet access before such an update occurs.
Support
-------