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14 votes

How to port-forward internet using Android Hotspot to PC?

In most cases you won't be able to make inbound connection when using Mobile Data because of CGNAT and firewalls at ISP level, as explained by acejavelin in comment. To know the problem in detail and ...
Irfan Latif's user avatar
  • 20.7k
11 votes
Accepted

How to view network traffic requested by a specific app?

If you have rooted phone, go for nethogs (for live monitoring) or iptables (to get statistics) commandline tools. Using VPN or Android stats based apps is the only possible non-root solution. Or refer ...
Irfan Latif's user avatar
  • 20.7k
11 votes
Accepted

Websites suddenly inaccessible but Google search works

At the moment a large number of popular website are dropping support for all SSL/TLS versions below TLS1.2 because of the known vulnerabilities in TLS1.1/TLS1.0 and older. Your device is very very ...
Robert's user avatar
  • 20.5k
11 votes
Accepted

Can an Android device connect to the internet before decrypting the storage?

Yes, it can. Android uses File Based Encryption which has Device Encrypted storage that encrypts device data and non-personal user & app data without screen lock credentials so that this data can ...
defalt's user avatar
  • 1,079
5 votes
Accepted

Should a certificate be installed when a browser offers to install it?

Yes, your bank wants to establish a secure connection to you. To make sure that the connection is secure, a set of certificates must be installed on both your client and the bank's servers. If the ...
Sergey's user avatar
  • 86
4 votes

Why do two smartphones connected to the same WiFi network show different speeds (one displays the link speed as 135 Mbps and other only 72 Mbps)?

Just a quick comparison Xiaomi Redmi note 3: Credits Gsmarena Acer Liquid Z630s: credits: Gsmarena The link speeds you mentioned are usually achieved only under ideal conditions which is not ...
xavier_fakerat's user avatar
4 votes

How to view network traffic requested by a specific app?

With PCAPdroid you can see the individual connections made by the apps. It's an open source tool developed by me which works without root (root is optional). It has lots of interesting features for ...
emanuele-f's user avatar
4 votes
Accepted

Restricting an app to only send internet traffic but not receive that back?

It's possible, but far from easy to achieve. There are multiple approaches we can use to block (or at least try to block) incoming traffic. But blocking one way traffic doesn't make sense in most ...
Irfan Latif's user avatar
  • 20.7k
4 votes
Accepted

How to connect an Android phone to PC for internet via USB

Yes, it is possible, but you need to root your device. The Android kernel supports it, simply there is no option to do that in the GUI. There are also apps to do it, but all of them requires root ...
peterh's user avatar
  • 1,015
3 votes

Disable default Internet app on Android 6.0.1 on a Samsung Galaxy Tab S2

From https://www.xda-developers.com/uninstall-carrier-oem-bloatware-without-root-access/: WARNING Uninstalling system applications can be dangerous so please know what you’re getting rid of before ...
Joe's user avatar
  • 426
3 votes

reverse usb tethering works, but no internet

You just need to configure the dhcp. Open Terminal emulator and type in: su . The $ will change to #. Type the following command in Terminal Emulator: netcfg rndis0 dhcp The name for usb ...
xavier_fakerat's user avatar
3 votes

Why network activity is detected from apps after VPN firewall blocks them?

Is the problem caused because GlassWire reports false positives? You are correct. This question appears to be related to the understanding of OSI Model. NetGuard is based on VPN which makes use of ...
Irfan Latif's user avatar
  • 20.7k
3 votes

What are validated connections?

In the source code I see this sets a preference which is later read and enables the checking of NET_CAPABILITY_VALIDATED. This capability is documented as "Indicates that connectivity on this ...
user349053's user avatar
3 votes

Problem with hotspot - WiFi connection on, but internet is down

I have a fix for LinuxMint which is derrived from Ubuntu and I posted the fix on LM. Using "Search" (application), I searched for ".conf" in "File System" and found the ...
Jim Clark's user avatar
  • 131
3 votes
Accepted

Android TV/box, wrong date time, and no internet access

A correct date or at least a date not too far away from reality is important for every internet device in these days. The reason is that internet connections are mostly HTTPS (HTTP over SSL/TLS) ...
Robert's user avatar
  • 20.5k
2 votes

How to simulate a slow internet connection on an Android phone

When using Emulator is not an option for testing certain functionality (frequently), our team hot-spots for physical Android devices with an iOS device and uses the Network Link Conditioner on that. ...
Jake S's user avatar
  • 21
2 votes

Block apps from accessing the Internet on Android device

I am amazed no one has mentioned the Google solution, Datally. No root required. More information on the Google blog: https://blog.google/technology/next-billion-users/meet-datally-new-way-understand-...
bers's user avatar
  • 203
2 votes

Block apps from accessing the Internet on Android device

For CyamogenMod Users There is a built in Privacy Guard. (Settings -> Privacy) It can prevent app from using Internet (wifi and/or mobile)
Inoy's user avatar
  • 121
2 votes

How can I flush the DNS Cache?

In modern versions of Android there is an option to clear Chrome's DNS cache under chrome://net-internals/#dns
Joao Costa's user avatar
2 votes

UPNP over the internet?

This does not work because your phone does not receive the advertisement packets sent out by your media server and vice versa. Those packets are only forwarded within your home LAN but not over the ...
dirdi's user avatar
  • 121
2 votes

How do I make reverse tethering work?

Check out Gnirehtet from Genymotion. It's the most simple solution I've come across. There's no root required. The only requirements are that you should have Java 8 and recent version of adb ...
vishnu narayanan's user avatar
2 votes
Accepted

Since which Android version does it detect internet connectivity on Wi-Fi?

The "Smart Network Switching" is available since Android 5.0. You can see it in the official changelog here (in "see all features", "connectivity" : «Improved network selection logic so that your ...
Maeln's user avatar
  • 131
2 votes

Setting permissions for which networks an app can access

You can try NetGuard - no-root firewall to block internet access for apps selectively (forbid an app access to WiFi or cellular data). It works without Root as name suggests. It's available from ...
Neal Sharma's user avatar
2 votes

WiFi has no internet access, but it does

"Connected, no internet access" means that the test that Android uses to check if there is Internet access is failing. The url or method used to test if Internet is working varies by Android version ...
acejavelin's user avatar
  • 6,197
2 votes

Can cellulardata & WiFi be on while charging? Sporadic case of meager increase in charging while both were on

The WiFi + Mobile data should not eat up so much energy that the charging is slow, except if you have an ancient phone/charging device that has no quick charge technologies. I would suggest: make ...
Chapz's user avatar
  • 752
2 votes

Where does Google Chrome automatically save pages?

This would be in Chrome data, which means you need root and on my device running 8.1 stock this seems to be it /data/data/com.android.chrome/app_chrome/Default/Offline Pages/archives/ where you have ....
beeshyams's user avatar
  • 41.1k
2 votes

How can I share my free internet vpn connection with my laptop?

The easy Way... 1. Start your VPN on your phone 2. Install/Use Clockworkmod's USB Tether. 2b. Use PDANet/Foxfi for wireless sharing. The Clockworkmod/PDAnet tether app will connect to the internet ...
TardisGuy's user avatar
  • 314
2 votes

How to use "/etc/hosts" file as only DNS on Android?

Add allowed hosts to /etc/hosts and define these firewall rules to block any outgoing DNS queries on standard UDP port 53: ~# iptables -I OUTPUT -p udp --dport 53 -j REJECT * May also use less rude ...
Irfan Latif's user avatar
  • 20.7k
2 votes

Timezone is not updating with WiFi and ethernet network in Android

Time synchronization via Wifi/Ethernet bases on the NTP protocol. All NTP server are running with UTC time, hence they can not provide a time zone. If if they would the time-zone would be useless, as ...
Robert's user avatar
  • 20.5k
2 votes

Latency spikes regularly spaced on a OnePlus5 phone, reproducible on both ATT & TMobile

Root cause identified: Having two sims in the phone causes the problem. When I removed the 2nd sim, no reboot even needed, the problem disappeared. Wow OnePlus, wow.
davidparks21's user avatar

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