Questions tagged [networking]

Generic network issues. Before using this tag, check if there's a closer fit (see tag wiki).

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2 answers
46 views

Can a school wifi certificate track me at home?

At my school, when logging into wifi for the first time, we enter our ID & password into a normal wifi login page, then we download a certificate. I cannot confirm if the certificate changes ...
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Does Android allow incoming connections?

Some posts explain, that Android OS has all ports open by default with a policy to accept all incoming connections. But od a "NetGuard" Android project they mention "Android does not ...
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Connect to a Network over wifi or ethernet adapter, with twrp and use the terminal?

Im a noobie with twrp and android, i have Install it on a very cheap Nexus 5 and it works. Is it possible now, connect with twrp to a network with the terminal, if not possible over WiFi could it be ...
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Some local ipv4 hosts unreachable

Periodically some hosts on my LAN (but not others) are inaccessible from my phone, both in chrome and pinging/tracerouting from termux.  These hosts are up at the time and accessible from other ...
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How to "permanently" turn off networking on an android device?

I'm in the process of creating a "secure device" to store and process sensitive information. Using an Android device was the best course of action for me, since I can make a quick app, plus ...
2 votes
1 answer
153 views

How can I list which TCP Congestion Control Algorighm my Android device is using?

How can I enumerate the complete list of TCP Congestion Control Algorithms that my Android device supports? And how can I see which apps are using which algorithm? I'm trying to figure out why some ...
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31 views

How does Android device supply internet to apps and apps become online?

Apps are in an offline state. Whenever I turned on data (internet), in the blink of an eye, the apps become online. In another instance, I turned on data (but I have no internet), and apps are not ...
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1 answer
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Issue with FTP over hostapd hotspot and specifically an Android client using ProFTPD

So I have been using this setup with an iPhone quite successfully. The "server" box is running Fedora 34, on which is installed ProFTPD. I went through and configured through the visual ...
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142 views

Android X86 VM on Hyper-V has no network connection

I followed these instructions to install an Android X86 virtual machine on top of Hyper-V inside windows OS. However, now the VM has no internet connectivity. Here are my network settings: can you be ...
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1 vote
0 answers
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Using android phone as a DMZ/access point

I had a router suddenly die, and was wondering if I could use a spare Android phone as a temporary replacement. Currently the network has one laptop connecting via Wi-Fi, and one desktop connecting ...
2 votes
0 answers
42 views

Using Android phone as a WiFi repeater without using mobile data

There have been quite a few discussions related to this topic Can I use my phone as a WiFi-WiFi hotspot? [duplicate] Turn On Both Wifi and Wifi Hotspot [duplicate] How to use Wi-Fi and hotspot at the ...
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1 answer
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Is Galaxy S3 always disclosing an WiFi SSID? [duplicate]

I read tons of articles about how is it bad do hide SSID because client devices can disclose the network parameters by constantly "pinging" it when not in range. Ok, here is the client the ...
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1 vote
1 answer
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Android 9 device does not save network

On an Android 9 tablet: Settings Use Wi-Fi Add network Enter an SSID, and select security None (the Wi-Fi does not require a password). Tap Save The network is not saved and the tablet does not ...
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Receive IR signals through camera

I want to receive IR signals on my phone. The camera can see IR, but I cannot tell which button I pressed. (yes, I know that's not how it works). No app on the Play Store could help me because they ...
1 vote
0 answers
41 views

What to do if malware not gone after complete factory reset?

I have a virus in my Samsung galaxy s21a, and even after a complete factory reset phone doesn't recover. What would be other solutions to fix it?
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WakeOnLan on Android - TV

I would need to know if the TV's network card supports WakeOnLan (it has RJ45 port). One Unix function that would let me see that would be "ethtool" but is not installed in the system. I ...
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0 votes
1 answer
85 views

Route some traffic via VPN while the rest routed as usual (non-VPN)

I manage some servers where VPN is the only access for maintenance. On Linux, we use xl2tpd, strongswan-starter, and ip-route. I want to gain access to my phone (Pixel 3, Android 12) such that traffic ...
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0 votes
1 answer
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Wifi connects disconnects on android

I have android device with stock android(moto edge 20). Whenever the wifi signal(router) are weak the wifi disconnects. This problem is frequent when my device is connect to a Bluetooth device. This ...
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26 views

Detect the Incoming TCP Packets

I am developing a feature in my application for screen mirroring for which I need to open a wide range of ports (approx. 10000 number of ports) in my android system. It is a risk to open all these ...
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24 views

I need to block some videos (inside Youtube app) and sites (inside Chrome or another browser) using keyword

example: I want to block pages/videos where the content/title contains the word "fish". How can I do it? Thank you.
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183 views

Android phone won't connect to LAN computers/NAS box

I have an Oppo Find X3 Pro running Android version 12. On my phone, I have file and network explorer app ES Pro installed. In the app, when I click on 'LAN' or 'Network', it detects all my Windows PCs ...
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1 answer
73 views

Hotspot DHCP issues without mobile data (dhcp4 request timed out)

By default, does the Android "hotspot" functionality provide a DHCP server to its clients? Or does it just pass DHCP info on from the network that it's connected to? I'm trying to create a ...
0 votes
1 answer
46 views

VPN broke my network connection, how can I restore it?

I have a problem on my Lenovo K33a48 with Android 7.0. The problem manifests in almost all my google apps showing that there is no internet connection (Chrome, Play Store, Gmail), not syncing to my ...
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1 vote
0 answers
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Change network interface name in persistent way on Android [duplicate]

Is it possible to change the name of a network interface in an Android 11 rooted system making the change persistent? I am not looking for just renaming the interface after the boot, I want to change ...
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Share RTSP stream over different subnets

I have a non-rooted Android device that is connected through ethernet to an IP camera. Any RTSP player can play the stream using the address rtsp://192.168.105.180:554/live/0 This device can also ...
2 votes
1 answer
189 views

Disabling randomized macs on Android 11

Trying to set up a new Moto-G Stylus with Android 11 on an internal wifi network with mac authentication and a hidden ssid. To provide the expected mac, I selected "Use device MAC" (which is ...
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Port Forwarding Outside Local Network Using Phone Network

I want to forward my local port outside of network as does in routers but through phone's network. I having Android 11. I have looked many pages and fortunately found this but this seems like it does ...
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275 views

Android 11 does not seem to use DNS

On my Android device, I'm connected to a wifi router which is connected my home network. I tried setting DNS to 8.8.8.8, 1.1.1.1, and other DNSs. If I ping, say, 8.8.4.4, the connection works. ...
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0 votes
1 answer
125 views

Android phone cannot access internet when connected to bridge mode router

I have 3 routers in the house. 2 are using bridge mode (for wi-fi coverage) and 1 main router My other devices work fine (either connect to the main router or bridge mode routers) All routers use the ...
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1 vote
0 answers
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VPN Connection Details?

Is there any way to see details (VPN IP Address/Protocol/Port) of a saved VPN connection which located under network settings in Android 10 and newer versions ?
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Taking a long time to connect to the internet (connected - no internet)

This is not a permenant problem but rather an intermittent, yet constant one. Lemme explain... A few days ago I changed my wifi router and my phone would connect to it but it says "connected, no ...
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1 vote
1 answer
45 views

unlocked phone can be used for all compatible phone service providers?

There is an Android phone ad like this: Due to USA carrier VoLTE restrictions, this phone is only certified to work on T-Mobile and T-Mobile MNVOs(Mint Mobile, Google Fi, etc.) It however is unlocked ...
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1k views

Some android apps not working on WiFi, but working on mobile data

I've had a strange scenario these days. While on WiFi connection, whenever I tried accessing certain apps from my android device, they would be stuck on the loading screen forever. Other apps were ...
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0 votes
1 answer
117 views

Does TubeMate use some peer-to-peer network?

I was using TubeMate to download my first video with TubeMate, and I got banned from the Wi-Fi network I was using: Online activity through a browser or application has been flagged as malicious or ...
1 vote
1 answer
60 views

Phone's download speed doesn't go over 10 Mbps(1.2 MBps)

I have an ASUS Zenfone Max Pro M1(X00_TD). Lately, I have noticed that my phone's downloading or uploading speeds don't go over 10 to 15 Mbps. It has a 2.4 G wifi and easily used to give me 40-60 Mbps ...
1 vote
0 answers
330 views

How to Block an IP Address on Android

There's an IP address keeping ICMP my network every minute. I've already blocked the IP on my router, I'd like to know how to configure traffic control on Android if possible. Please tell me if there'...
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0 answers
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Mobile hotspot with outbound firewall

Goal: A mobile hotspot that limits outbound connections to an approved set of domains or IPs. OK to connect to twitter.com, but reject facebook.com. Etc. Idea: Use an Android phone (as a hotspot), ...
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0 votes
1 answer
102 views

Do Android permissions allow listeners on ports >1024 without special root permissions (only standard in-app permissions)

I'm not an Android developer, I am a developer in many other contexts. I have a simple question that I don't see an answer to on Google: Can a standard android application (no rooting required) listen ...
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0 answers
612 views

bluestacks and lan (local network)

I have application that can control my TV. It needs access to local network to work. How can I make bluestack see devices in my local network ? Best regards.
2 votes
1 answer
142 views

My Xiaomi Android smartphone suddenly doesn't see my WiFi's SSID in the WiFi connection list

I've had an internet outage and afterwards my Android 9 Xiaomi smartphone did not see my SSID at all in the system WiFi list and in the WiFi Analyzer app. My phone only supports 2.4 GHz WiFi, whereas ...
1 vote
0 answers
77 views

Android localhost to hotspot wlan0 UDP port not accesible

I have a drone remote that has android in it. It has an internal telemetry server that is publishing data on localhost:14445 via UDP. When I open the hotspot from this device and connect to it with my ...
0 votes
0 answers
21 views

Android TV Box Gigabits Connection

Is there any android apk app which is able to display a LAN network connection speed such as 100Mbps or 1Gbps. If this is not possible, is there any app that is able to display the network chipset ...
1 vote
1 answer
300 views

Where is the WiFi MAC randomization data stored?

In the newer Androids there's a feature called WiFi MAC Randomization. In its basic form, the mechanism calculates the random MAC for a given ESSID. Each time you connect to the same WiFi, Android ...
2 votes
0 answers
199 views

Cannot bind to Cell Network Interface example with curl

I am trying to use the Mobile Network interface rmnet_data0 while Wi-Fi wlan0 is enabled. You can read my progress with the developer JsBergbau of BindToInterface at this link https://github.com/...
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0 answers
69 views

How to find unknown IP address on Android

I believe I have a sort of unique question in how would I determine an unknown IP address through an Android device which is connected directly to a IP enabled piece of hardware via USB-C to Ethernet ...
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1 vote
1 answer
1k views

How to make Android device visible to Bonjour / Zeroconf with .local name?

I would like to access my device as myandroidthing.local, as I can do it with my (both Linux and Windows) laptops. Is it somehow possible? Most ideally, it could be done by some app what I can install ...
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1 vote
0 answers
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Using different port for IKE2 VPN on Android

My question is fairly simple: I would like to create an IKE2 VPN commection on stock Android11 but I don't want to use the default 500 or 4500 ports. How can I do that? I tried applying a colon then ...
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2 votes
1 answer
544 views

How to exclude a specific destination IP from VPN?

I want to route a specific IP address from hotspot (wlan0) to Mobile Data (rmnet_data1) interface on Android 11, bypassing VPN. I use my phone as a hotspot and also with the help of an app called &...
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0 votes
0 answers
175 views

Why does blocking of incomming connections via AFWall cut off the network connection?

There are couple of Android firewall apps in the wild, for instance AFWall. It manages iptables rules. Usually for client devices, admins set the default policy for the INPUT chain to block, but when ...
1 vote
0 answers
267 views

How do rndis0 and eth0 interfaces get set up?

In a normal installation, looking at ifconfig (or ip) in adb shell, there are no rndis0 or eth0 interfaces set up. Once USB tethering or ethernet tethering is enabled, they show up. With my GNU/Linux ...
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