**Background** -------------- Android 7.1.1 Nexus 6P uses VPN app from Private Internet Access. The app has a "Per App Setting" that allows certain apps to bypass the VPN connection (some games like Pokemon Go don't operate if behind a VPN, you get an 'unable to authenticate' error until you disable VPN or turn off PG in the per app settings). My son has my old Moto X phone (no SIM card) and needs to be tethered to my phone to have Wi-Fi when we're out and about. He does not have the PIA app installed on his phone. **PROBLEM** ----------- When he plays his Pokemon Go game, and we are tethered while my VPN app is operating, he cannot log in or authenticate with his game on his phone. I'll need to turn off my VPN completely before his app will allow him to log and play. **QUESTION** ----------- Is there an Android System Process that I can allow to bypass the VPN so that his tethered Wi-Fi connection isn't blocked?

To reduce power consumption and to lower the risk of unauthorized WiFi access, I would like to make the signal strength of my Android mobile hotspot as weak as possible. My mobile devices are located very close to each other, so the mobile hotspot on one of the devices can be detected and used even when the signal strength is very weak. Is it possible to adjust the signal strength of a mobile hotspot on Android?

When you connect to a WiFi network, the router assigns an IP to the android device (like 192.168.1.105). Now when a FTP or HTTP file server is run on the android device, other devices should type that IP to connect to the server. This IP is not fixed. When you switch to another WiFi network or enable hot-spot on android itself, it changes. Is there any way to assign a **fixed hostname** (for example my-pixel) so other devices could use it instead of the IP (like ftp://my-pixel.local:4030)? (I also asked this on Stack Overflow but no answer there)

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 am running LineageOS 20 (Android 10) on my Xiaomi Redmi 9 (lancelot) rooted using Magisk. I started a WiFi-hotspot and based on https://android.stackexchange.com/a/213626/521733 , I used the following commands from a root shell:

lancelot:/ # ip a show ap0
35: ap0:  mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether c2:98:90:46:b0:dc brd ff:ff:ff:ff:ff:ff
    inet 192.168.233.181/24 brd 192.168.233.255 scope global ap0
       valid_lft forever preferred_lft forever
    inet6 fe80::c098:90ff:fe46:b0dc/64 scope link 
       valid_lft forever preferred_lft forever
lancelot:/ # ip a add 192.168.100.1/24 dev ap0

Then, I connected to the hotspot using three methods: 1. DHCP Client received an IP: 192.168.233.81/24 Obviously, I was able to ping the Android gateway, as expected. 2. Static IP withing the 233 subnet Client IP: 192.168.233.10/24 Gateway and DNS: 192.168.233.81 Once again, I was able to ping the Android gateway, as expected. 3. Static IP within the 100 subnet Client IP: 192.168.100.10/24 Gateway and DNS: 192.168.100.1 **I was not able to ping the Android gateway.** There aren't any iptables rules that would drop this traffic:

lancelot:/ # iptables-save | grep tether                                                                                                                                
:tetherctrl_raw_PREROUTING - [0:0]
-A PREROUTING -j tetherctrl_raw_PREROUTING
-A tetherctrl_raw_PREROUTING -i ap0 -p tcp -m tcp --dport 21 -j CT --helper ftp
-A tetherctrl_raw_PREROUTING -i ap0 -p tcp -m tcp --dport 1723 -j CT --helper pptp
:tetherctrl_nat_POSTROUTING - [0:0]
-A POSTROUTING -j tetherctrl_nat_POSTROUTING
-A tetherctrl_nat_POSTROUTING -o wlan0 -j MASQUERADE
:tetherctrl_mangle_FORWARD - [0:0]
-A FORWARD -j tetherctrl_mangle_FORWARD
-A tetherctrl_mangle_FORWARD -p tcp -m tcp --tcp-flags SYN SYN -j TCPMSS --clamp-mss-to-pmtu
:tetherctrl_FORWARD - [0:0]
:tetherctrl_counters - [0:0]
-A FORWARD -j tetherctrl_FORWARD
-A tetherctrl_FORWARD -j bw_global_alert
-A tetherctrl_FORWARD -i wlan0 -o ap0 -m state --state RELATED,ESTABLISHED -g tetherctrl_counters
-A tetherctrl_FORWARD -i ap0 -o wlan0 -m state --state INVALID -j DROP
-A tetherctrl_FORWARD -i ap0 -o wlan0 -g tetherctrl_counters
-A tetherctrl_FORWARD -j DROP
-A tetherctrl_counters -i ap0 -o ccmni1 -j RETURN
-A tetherctrl_counters -i ccmni1 -o ap0 -j RETURN
-A tetherctrl_counters -i ap0 -o wlan0 -j RETURN
-A tetherctrl_counters -i wlan0 -o ap0 -j RETURN

Why is it not working? What is dropping the traffic? How do I fix it? My use case is as follows: I need to connect a Raspberry Pi to the hotspot and access it from my phone. Unfortunately Android hotspot subnet is set randomly, so I don't know the IP address that the client got assigned. mDNS does not seem to work, so the only other option I can think of is a static IP on a different, non-random subnet.

My only internet connection at present is via a hotspot on Moto G7 (running Android Version 10) connecting via GiffGaff (which runs on the O2 network). I keep the phone data on 3G as 4G seems slower when the network strength is low. I have had a connectivity problem between my phone and my Asus laptop running Win 10 Home (build 19042.1348) for about the last year. Sometimes the connection is fine running at 1-3 Mbps download but frequently it disconnects. I can often get a reconnection by disconnecting and reconnecting my connection to the phone hotspot on my laptop and/or by running Windows' network Troubleshooter. This disconnection happens every 3-10 minutes so having to reconnect 10 times an hour is not unusual. I would be grateful for two things: Firstly if there is an obvious solution I would love to hear it; Secondly I am unfamiliar with this area and would be grateful for a recommendation of diagnostic tools. I emphasise this is a problem of connectivity between the laptop and the phone via wifi. This is not a problem of the network to the phone. Thanks for your time.

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 many devices associated with my phone. I would like to know their induvidual signal strength. Google shows a quite messy misleading picture, as it is unfortunately usual for the Android questions. It seems to me it is not an easy task. Also programming hints or solutions needing root access are okay.

Many questions regarding QR are from years ago. My question is, will a single QR handle 2 functions. What I'm trying to achieve is. A QR which allows user to connect to my Wi-Fi (Hotspot) AND open a desired website. NOT A CAPTIVE PORTAL.

I can not see a way to set up the network parameters if I start a wifi sharing in AP mode. The usual behavior of my phones is that they randomly allocate a /24 block somewhere below 192.168.0.0/16, and everything will be random there. They are also re-generated, if the wifi stops working on any reason. I want to change it. I want the good old times back as I just could determine the IP range, the IP of the AP in it and that worked well. It would be yet much better if I could even create a mac-ip mapping, like it is possible in any dhcp daemon on the Linuxes; but I think it will remain a dream today. Can I do it? I have here a rooted Android 11.

I have a PC that connects to the Internet using the wireless network of a Nokia XR21 hotspot. The network is being frequently disconnected maybe by a jammer. How can I stop the disruption?

I am using Mi 10i with MIUI 14. WiFi and hotspot stopped working after my phone automatically restarted while I was playing COD, and it did not want to start. When I tried to start the WiFi, it showed starting WiFi but there was no effect. There is no other issue on the network.

I was reading up on [local-only hotspots](https://source.android.com/docs/core/connect/wifi-softap) and was confused by some of the language. Am I right in my understanding that a local-only hotspot will be visible to and accessible by other phones in the physical vicinity but that there just won't be any internet provided by the network? That's originally what I thought until I read the documentation for the [WifiManager.startLocalOnlyHotspot](https://docs.kony.com/NativeAPIs/Android/android.net.wifi-Android-10.0/index.html#!/api/android.net.wifi.WifiManager) method: > Request a local only hotspot that an application can use to communicate between co-located devices connected to the created WiFi hotspot. The network created by this method will not have Internet access. *Each application can make a single request for the hotspot, but multiple applications could be requesting the hotspot at the same time.* When multiple applications have successfully registered concurrently, they will be sharing the underlying hotspot. (emphasis added) That suggests to me that the hotspot is not something that a phone would connect to like any other Wi-Fi network but that an application has to request access to somehow. Using Android Studio, I emulated two phones and ran a simple app on one of them that uses the WifiManager API to start the local hotspot. Running ifconfig in an adb shell, I see that the phone that created the hotspot gets an IPv4 address assigned to its wlan0 interface after the hotspot is started. I'm also able to get the app to report the hotspot's SSID ("AndroidShare_5479"). However, on the other phone, no additional entry shows up in the list of available Wi-Fi networks. Of course, there's always the possibility that I'm using the API incorrectly. However, that's a question better suited for StackOverflow. My question for this community is, "What is the nature/function of a local-only hotspot?"

So my idea for a project is a firewall for Android hotspot. Like on routers you can block access to certain websites, I want to implement it in Android. In settings, system can only limit number of connected users. There aren't advanced options (I'm using Android 13). So if I for example block instagram on my firewall, the devices connected to my mobile hotspot won't be able to access it. Like a parental control. I know I probably must root my phone for this, but it's no problem. The answers I read were old and I didn't find any specific instructions. People recommended using hosts file or iptables but I'm not sure it would work if the request isn't directly from my phone. Downloaded a few blockers but they also fail, or doesn't even have options to do this. So the main question is, is it possible ? I wanted to ask before I start digging in my phone. Information I found: https://android.stackexchange.com/questions/214660/is-there-a-way-to-set-up-a-firewall-on-mobile-hotspot-to-block-incoming-connecti https://www.reddit.com/r/AndroidQuestions/comments/ihjrbv/mobile_hotspot_allow_only_one_website/ How to use iptables in an Android application https://android.stackexchange.com/questions/144422/create-wifi-hotspot-but-block-access-certain-domains https://android.stackexchange.com/questions/195351/how-to-block-a-particular-website https://android.stackexchange.com/questions/149381/how-to-block-filter-sites-on-mobile-data-connection-preferably-using-dns-server/219405#219405 https://android.stackexchange.com/questions/16485/how-to-block-access-to-a-website/218316#218316

I'd like to assign a static IP address to my laptop when it connects to the mobile hotspot created by my Android 14 Xiaomi phone. This would allow me to access SFTP servers running on my laptop from my phone more easily. Additionally, it would be beneficial to have a static IP or a '.local' address for the phone itself, though setting a static IP for the laptop is my primary concern. My laptop already has a .local address, but the address doesn't resolve in Android. (I thought this problem was solved in recent Android versions, but it still doesn't work.) I can root the phone if needed.

Someone has a Samsung Galaxy A14 as well as I do. Now, I'm connected to its WiFi hotspot. I want to know if I can download their call log and text messages.

I am creating a Wifi hotspot with hostapd and providing DHCP/DNS through dnsmasq on an Android 5.0.1 device. When a client connects to the Wifi hotspot it is subsequently unable to obtain an IP address through DHCP. The dnsmasq server claims to send a DHCP ACK response but no packet is seen in wireshark. dnsmasq is started with the following options (formatted for viewing). /system/bin/dnsmasq --keep-in-foreground --no-resolv --no-poll --dhcp-authoritative --dhcp-option-force=43,ANDROID_METERED --pid-file --dhcp-range=2001::2, 2001::10, ra-stateless,infinite --enable-ra --dhcp-range=192.168.42.2,192.168.42.254,1h --dhcp-range=192.168.43.2,192.168.43.254,1h --dhcp-range=192.168.44.2,192.168.44.254,1h --dhcp-range=192.168.45.2,192.168.45.254,1h --dhcp-range=192.168.46.2,192.168.46.254,1h --dhcp-range=192.168.47.2,192.168.47.254,1h --dhcp-range=192.168.48.2,192.168.48.254,1h --dhcp-range=192.168.49.2,192.168.49.254,1h The dnsmasq logs show that dnsmasq receives the DHCP REQUEST from the client and attempts to respond with DHCP ACK. I/dnsmasq (10989): started, version 2.62 cachesize 150 I/dnsmasq (10989): compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP DHCPv6 no-scripts no-TFTP no-conntrack W/dnsmasq (10989): warning: no upstream servers configured I/dnsmasq (10989): IPv6 router advertisement enabled I/dnsmasq (10989): DHCP, IP range 192.168.49.2 -- 192.168.49.254, lease time 1h I/dnsmasq (10989): DHCP, IP range 192.168.48.2 -- 192.168.48.254, lease time 1h I/dnsmasq (10989): DHCP, IP range 192.168.47.2 -- 192.168.47.254, lease time 1h I/dnsmasq (10989): DHCP, IP range 192.168.46.2 -- 192.168.46.254, lease time 1h I/dnsmasq (10989): DHCP, IP range 192.168.45.2 -- 192.168.45.254, lease time 1h I/dnsmasq (10989): DHCP, IP range 192.168.44.2 -- 192.168.44.254, lease time 1h I/dnsmasq (10989): DHCP, IP range 192.168.43.2 -- 192.168.43.254, lease time 1h I/dnsmasq (10989): DHCP, IP range 192.168.42.2 -- 192.168.42.254, lease time 1h I/dnsmasq (10989): stateless DHCPv6 on 2001::2 I/dnsmasq (10989): SLAAC on 2001:: prefix valid infinite I/dnsmasq (10989): read /etc/hosts - 1 addresses I/dnsmasq (10989): using nameserver 8.8.8.8#53 I/dnsmasq (10989): update ra:true|wlan0|rmnet0|97 I/dnsmasq (10989): internal inf is wlan0 I/dnsmasq (10989): external inf is rmnet0 I/dnsmasq (10989): set table number:97 I/dnsmasq (10989): update_ra count:0 I/dnsmasq (10989): link local address:wlan0 I/dnsmasq (10989): failed to send_ra: face_enumerate, parm.found_context I/dnsmasq (10989): failed to update ra:send_ra I/dnsmasq (10989): DHCPDISCOVER(wlan0) c0:bd:d1:4a:3a:0f I/dnsmasq (10989): DHCPOFFER(wlan0) 192.168.43.127 c0:bd:d1:4a:3a:0f I/dnsmasq (10989): DHCPREQUEST(wlan0) 192.168.43.127 c0:bd:d1:4a:3a:0f I/dnsmasq (10989): DHCPACK(wlan0) 192.168.43.127 c0:bd:d1:4a:3a:0f android-e55b7f59c0dfe96 Wireshark shows the reception of the DHCP REQUEST packet from the client but no DHCP ACK is ever sent. Instead, the host is issuing ARP requests for the offered IP address. I cannot understand why the host is sending ARP requests for the offered IP address instead of sending the DHCP ACK. Can anyone help me understand what I am seeing and how it can be fixed? Thanks. **EDIT** The wifi hotspot was created by monitoring all commands sent to the netd socket during standard wifi hotspot creation through Android and replaying those commands with /system/bin/ndc. ndc netd softap fwreload wlan0 AP ndc netd softap set wlan0 Redskins wpa2-psk DanSnyderSucks ndc netd softap startap ndc netd interface getcfg wlan0 ndc netd interface setcfg wlan0 192.168.43.1 24 up multicast running broadcast ndc netd tether interface add wlan0 ndc netd interface getcfg wlan0 ndc netd network interface add local wlan0 ndc netd network route add local wlan0 192.168.43.0/24 ndc netd ipfwd enable ndc netd tether start 192.168.42.2 192.168.42.254 192.168.43.2 192.168.43.254 192.168.44.2 192.168.44.254 192.168.45.2 192.168.45.254 192.168.46.2 192.168.46.254 192.168.47.2 192.168.47.254 192.168.48.2 192.168.48.254 192.168.49.2 192.168.49.254 ndc netd tether dns set 501 8.8.8.8 8.8.4.4 ndc netd nat enable wlan0 rmnet0 1 192.168.43.0/24 ndc netd tether ra true wlan0 rmnet0 **EDIT** Any suggestions or ideas on where to even begin debugging would be greatly appreciated. I have tried comparing logcat logs and kmsg logs but I have been unable to exact any useful information.

I have an Android tablet that has no SIM card and no cellular connection. Is it possible to set it up as a discoverable WiFi access point? I know when you have a cellular connection you can set up tethering and have an id and password that can be discovered by other devices. Is it possible to do this without any cellular connection? I don't actually need internet access at all. All I'm looking for is to set up a small WiFi LAN between an Android tablet and a small device running Debian Linux.

I bought a new Motorola Edge 2024, Android 14, and Kernel v5.10.198. The first thing I checked when I got home was tethering. I was shocked to see "not sharing internet" on the hotspot WiFi selector. Sure enough, upon configuration, a connected device could not ping Google. It also says "sharing internet" on the Bluetooth selector. So I paired my Dell Inspiron 5502 laptop to my Android phone, and activated the Bluetooth tethering selector. My laptop is unable to ping over Bluetooth. The only similar questions I found had to do with a Windows setting. I need the same for Ubuntu. I cannot find a way to enable Bluetooth IP networking on my Ubuntu 24.04 laptop. Is there a way to bypass the WiFi tethering block on this new Android OS? If not, can anybody point me in the correct direction to configure my laptop correctly? I suspect that to be the issue.

I want to use scrcpy remotely if I'm on mobile data, so I decided to turn on my mobile hotspot, connect to WiFi, and connect my laptop to it. Of course, that works. But if I disconnect from WiFi and connect to mobile data, there is no way for me to access my phone when I'm on the hotspot. Surely the phone would give itself a private IP on the hotspot, right? If so, how do I find it?