I have 60+ Android devices, all connecting to a local WiFi. I never want them to connect to the internet, so have put firewall rules in place to prevent any internet access. However, they all disconnect and never reconnect, or maintain a stable connection, because of needing some level of internet reponse from google servers. I have proven this by allowing the internet back onto the network and everything is fine again. can anyone advise what addresses i should be premitting in the firewall rules to make the devices think the network is fine, or is there some local way of faking a response so they dont even need to care about the google server? Thanks in advance, its been driving me crazy for a month. I have tried the ADB settings for captive portal to no effect either.

I wanted to reduce the amount of thing that Google knows about myself, because after reading several articles about what data that Google collect by default in android, I feel terrified. Because it is like no matter where I go, there is a creep behind my back that keeps on following me, watching me 24/7, like a drunk weirdo on the street that looks at me with scary eye and keeps on insisting to follow me (where in this case, the creep is Google). While trying to reduce the amount of data that google can collect on my phone (I have uninstalled or disabled all google app, including google play store, except google play services) , there is a severe roadblock that I encountered and don't know how to solve. One of the problem is that **I don't know how to keep google play services enabled while also preventing it from connecting to internet to stop google from misusing it to collect data in my phone**. I can disable it, but many app on my phone (such as WhatsApp) either breaks or work incorrectly when google play services is disabled. The most notable problem is that WhatsApp stop working in the background when google play services is disabled, that means I wont receive call and messages unless WhatsApp is opened in my screen (I have tried everything to prevent it from stop working in the background, none worked). To keep it simple, this is what I want to achieve: **I want google play services to remain enabled and all apps that use google play services able to connect to internet, while at the same time I don't want to allow google play services to connect to the internet**. In other word, I need some kind of firewall that allows all app, except google play services, from connecting to the internet. Android does not have firewall by default, and I tried to use firewall for non-rooted device such as NetGuard. To my surprise, google play services didn't show up in any of the firewall I tried, which means I cant use the firewall to block it. I really, really want to avoid rooting my phone because of serious security issues and the possibility of bricking my phone in the process. So, how to achieve what i want in non-rooted android phone?

I have a samsung galaxy chat B5330 device. Whenever I try to connect it to wifi, I get various errors as follows, 1. Using DHCP :- Here it shows a "obtaining IP address" message but never connects. 2. Using Static IP :- It connects to wifi but then shows a "internet not available" error. I'm sure that internet is available as many others use it successfully using other android devices/laptops etc. EDIT: I found out that not all are able to use the wifi. Some do not get connected(stuck in "obtaining ip address"), some get the "internet not available" error, some connect and get internet but at very slow speeds(10 KBps download speed) while some lucky dudes get blazing speed(10MBps download speed) Could this occur due to to many signals at same place? At any given place in campus, we get at least 2 strong and 1/2 weak wifi signals, not to mention some secured portable wifi hotspots from androids. How do I solve this error. Note that I don't own the router/wifi, it's open(No security, accessible by any student.)

I am trying to run a VM with internet access on my Pixel 6a and Android 14. I am using crosvm to successfully boot debian on the Pixel, but unfortunately I am not able to get internet access (or any communication to the host).

# https://crosvm.dev/book/devices/net.html 
ip tuntap add mode tap user $USER vnet_hdr crosvm_tap
ip addr add 192.168.10.1/24 dev crosvm_tap
ip link set crosvm_tap up

#routing
sysctl net.ipv4.ip_forward=1
HOST_DEV=$(ip route get 8.8.8.8 | awk -- '{printf $5}')
iptables -t nat -A POSTROUTING -o "${HOST_DEV}" -j MASQUERADE
iptables -A FORWARD -i "${HOST_DEV}" -o crosvm_tap -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i crosvm_tap -o "${HOST_DEV}" -j ACCEPT

cd /apex/com.android.virt/bin/

./crosvm run \
    -s /data/local/tmp/crosvm.sock \
    --disable-sandbox \
    --rwroot "/data/local/tmp/debian.ext4"  \
    --net tap-name=crosvm_tap \
    --mem 2048 \
    /data/local/tmp/kernel

So far, I followed the crosvm documentation and set up the TAP device and configure networking within the guest as described here: https://crosvm.dev/book/devices/net.html I am using a kernel that supports virtio, but lspci still shows an unclassified ethernet controller and there is no /dev/virtio-ports device.

root@box:~# lspci -k
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma]
lspci: Unable to load libkmod resources: error -2
00:01.0 Mass storage controller: Red Hat, Inc. Virtio 1.0 block device (rev 01)
	Subsystem: Red Hat, Inc. Virtio 1.0 block device
	Kernel driver in use: virtio-pci
00:02.0 Unclassified device [00ff]: Red Hat, Inc. Virtio 1.0 RNG (rev 01)
	Subsystem: Red Hat, Inc. Virtio 1.0 RNG
	Kernel driver in use: virtio-pci
00:03.0 Unclassified device [00ff]: Red Hat, Inc. Virtio 1.0 memory balloon (rev 01)
	Subsystem: Red Hat, Inc. Virtio 1.0 memory balloon
	Kernel driver in use: virtio-pci
00:04.0 Unclassified device [00ff]: Red Hat, Inc. Virtio 1.0 network device (rev 01)
	Subsystem: Red Hat, Inc. Virtio 1.0 network device
	Kernel driver in use: virtio-pci
00:05.0 USB controller: Fresco Logic Device 1400
	Kernel driver in use: xhci_hcd
00:06.0 Unassigned class [ffff]: Red Hat, Inc. Device 0011 (rev 01)
	Subsystem: Device 00ff:00ff
	Kernel driver in use: pvpanic-pci

How to setup a virtual network device on Android properly so that I can get internet/network access within my VM?

I was using WiFi normally on my phone. Then I turned it off, and after some time, turned it back on. Since then, I can not access the internet. It's showing > Connected (no internet access). I tried to set a static IP. It did not work for DNS 192.168.200.1. No matter what IP I set with this DNS, it does not work. Then I used 8.8.8.8 as DNS, now it's connected. But it is really slow, and the connection does not seem stable. Every time, I have to reload google.com several times just to get the page. The problem is specific to this device only. Other devices connected to the same network are perfect. Can someone suggest to me what I should do? Is this a router issue? Or is this my device problem? I'm new in this area. So my knowledge is not so deep, and you might have to explain things a bit more in detail for me to grasp the concept.

I've got a bit of a bizarre problem with my Android phone: My internet connection is working and fully functional, since Chrome and most other apps have no problems. However, some apps do not detect an internet connection. They display 'No internet connection' errors or similar. Some apps do this far more frequently than others, and some can reconnect randomly. Here are some observations: - My banking app does this almost every time I want to check it. - Various messaging apps will receive messages hours late (sometimes). - This issue is temporarily resolved on reboot, and for some time all apps can connect to the internet. - Terminating a process and relaunching it does not let it reconnect to the internet. - Some apps can be using the internet just fine at the same time that others are not. - Some apps never do this, such as Chrome, Google, various games and others. As far as I can tell, it has existed since I got the phone a few months ago. I've tried disabling Samsung's battery manager in case it is messing with apps to save power. I'm currently running my phone in safe mode - but it's unclear if this has had any effect yet. I'm on WiFi, and I don't use mobile data. I own a VPN app but it's almost never enabled (except when traveling). The VPN app is one of the badly affected apps. Other devices on the same WiFi network do not show similar issues, and this problem occurs on any WiFi network. Any advice on how to fix or troubleshoot this issue would be appreciated.

In my Lenovo Android phone, I am using the internet with 4G speed. I am giving hotspot to laptop via Android mobile, but in the laptop, it is showing there is no internet connection when I connect via laptop WiFi. How to fix it?

I use Internet on my S23 Ultra phone via Bluetooth tethering. Is there any upside in using Bluetooth tethering instead of wifi tethering when using Android devices?

Some time ago, my private pictures and videos on my phone got published on the internet by someone else. I want to know where they got published and take them down. Is there any way to trace my face across the internet and be able to take down myself? Something like picture or retrieval apps that I can install on my phone? I have tried to use Google Images or Lens, and it tells me that it's not capable of doing this, which I know is a lie. I have also tried using other apps like Criminal Checks, etc. At one point, it told me that my info had been on the internet since 2019. So, I know something is out there.

I use Chrome on Android. How can I configure Google Chrome or Android so that whenever I visit a given subdomain on a given site (e.g., www.reddit.com) it always redirects to another subdomain on the same site (e.g., old.reddit.com)?

I am using a Moto G Play (2024). All of my apps have stopped recognizing my internet connection. They have always worked fine until recently when nearly all apps have stopped opening because of an error stating no internet connection. I tried: - Turning off WiFi and switching to mobile only. Mobile and WiFi are unlimited and connected. However, each connection is still showing no internet on the apps. - Rebooted modem and device. - Cleared cache and storage per app. - Reset network connection. - Reset app preferences. - Uninstalled and reinstalled apps and now Google Play Store stopped working as well. Also, it's even the System / Moto Help button is not able to load because it is also now telling me the same thing, and some of the browsers as well. Chrome is working. This is confusing as they were working fine and all of a sudden stopped recognizing the connection. Does anyone have an idea of what is causing this and what I should try next?

I'm dealing with some pretty insidious hacks on both my phone and computer (Fedora 41). A lot of it has to do with Google, but more than that, I'm still a little lost. I plugged my compromised Android into my USB port and probably compromised my computer more than it already was. When setting up a simple blank activity in the emulator with Wireshark running, I'm seeing A BUNCH of RTSP packets signifying consistent streaming. I'm guessing it to be real-time sound data. The microphone icon is on on the toolbar of my desktop too. This doesn't seem correct to me, but as I don't have a known safe baseline to compare I can't determine "appropriate" behavior. Is this normal behavior?

I'm on a POCO phone M4 pro 5G, running MIUI Global 12.5.8 Android 11 RP1A 200720.01 Sometime I face this annoying problem which apparently no-one experencied on the internet. If I'm sharing my connection via WI-FI Hotspot, at a point it may stop working as the button turns off. This may happen once or twice every week randomly (not linked to battery saving mode). Once the hotspot button toggled off, I coudn't get toggle it on again not even by restarting my phone. As soon as I touch it, it toggles off again. This problem may go away by itselfs in a matter of minutes or hours. I've never notice before but tonight this thing happenend and I got an error saying my GPS wasn't on anymore. When checking the position button it was toggled off as the hotspot one. I coundn't get back neither of them. After 30 mins without any restart they started to work again. What could be the problem... and the solution? Thanks

I have an old Android 4.1 tablet running on a Rockchip processor. While it’s quite slow, it still works well enough to display a clock or a web dashboard. The problem is that I can’t browse the internet anymore. I believe this is because many modern websites (likely using CDNs and reverse proxies for load balancing) now require TLS 1.2 or 1.3, which isn’t supported by the outdated Chrome browser installed on this device. Unfortunately, I can’t update to a newer browser since they no longer support Android 4.1. Does anyone have suggestions on how I can enable web surfing again on this tablet?

I use a USB dongle to use the internet, which I connect to my laptop. Then, I share the internet via Adhoc Wi-Fi network, but the network is not searchable on my pone. I searched Google and found some software like Connectify. With this software, the network appears on my phone, but it keeps on scanning and never gets connected. Also, the network which I have created does not share it with other laptops. Is there a free software through which I can connect with the laptop internet through Bluetooth or Wi-Fi? I don't like the internet pass through because I was unable to move my phone on my apartment with that option.

I have a robot mower and it's great, however, if it gets stuck, it can only be controlled via Bluetooth using its Android app, which is not much use if I'm away from home. Is there a way to control a spare phone mounted on the robot that has the app on it from my own phone over the internet?

When I enter the Play Store, it asks for an existing account. I put it in, and it says that I need to have a better connection. I would sit right next to my router, but the same thing happens. How to fix this?

I cannot use any browser with a VPN turned off using mobile internet, but I can use other apps, such as BBC or Viber. I also can access the internet via Wi-Fi with a VPN turned off. What I have tried: - I have reset APN settings many times, but it will not work. - I cannot turn off the proxy because there is no such option. The proxy section is blank. When I fill in the blank with some random letters, and then blank it again, the internet begins to work, and after a few searches on the browser stops. - Actually, when I change some other sections of APN the internet starts working, but then stops. - When I put a SIM card from a different provider into my tablet, it worked. And when I put my SIM card into another device, it also worked on that device. - I called the company for help. They say that my APN settings were out of order. They sent me new ones. That also didn't solve the problem. - I have even reset the tablet to factory settings. To my chagrin, it hasn't worked. I am clueless about whether or not the problem is with the tablet or the mobile data provider. Tell me please what is wrong.

I have a Moto G3 Turbo with Android 6.0.1 Marshmallow. I use the phone to make WiFi hotspot so I can use internet on my laptop. I was able to do a successful Metasploit over WAN/Internet, and for that I need to port-forward to my laptop. But the problem is, I don't have any modem or router to actually go to setting login with admin password or anything like that. What can I do? Is there any app that can do this and whether it needs root permission?

I recently installed Android x86 through VirtualBox onto my PC. It runs mostly fine (except for some weirdness with the mouse, which isn't really an issue) but for the fact that apps cannot detect the internet connection. I can access the internet through the included browser just fine, so I know that the connection is actually getting to the VM, but apps cannot access it. From https://android.stackexchange.com/questions/62371/ , I read that it's because I am using NAT or virtual ethernet that some apps detect that there is no WiFi or cellular and refuse to work. Is there a way to fix and/or get around this? If it helps, my host OS is Windows 10 Educational and I will do my best to provide hardware specs if that would help solve the issue.