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Questions tagged [firewall]

A firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet. Usage of this tag may be aligned to users concerned with suspected malware creeping into their devices, setting a filter to allow certain applications to access internet and general monitoring of incoming/outgoing network connections

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Can I block access to wifi and mobile data on a kid's phone? [duplicate]

We would like them to have a phone to call us if needed but not access wifi or data and get on the internet. Can we block wifi and data and lock it so they can't change the setting.
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1answer
32 views

Any protected firewall available

is there any protected firewall available? I have tried many & the problem was as follow: - it works very well but ANY user can simply uninstall it!! how didn't they put this into consideration. - ...
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1answer
48 views

Can firewall block connection over VPN?

I would like to block specific apps from making connection to internet. I sometimes am connected by VPN but not always. How can I make firewall work for both VPN and not VPN, wifi and mobile data? My ...
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1answer
142 views

Apps whitelisted in AFWall+ without my knowledge

I've installed a firewall (AFWall+) on my phone, and I've manually whitelisted every app I wanted to allow accessing the Internet, including system apps. So everything is blocked by default, and I add ...
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0answers
33 views

Using the Google Maps App behind a firewall

I'm developing an app, which starts a Google Maps navigation by Intent. This works fine, as long as the device has "free" internet access. Unfortunately, the app is intended to be used on devices, ...
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0answers
71 views

Glasswire report that app access Internet although NetGuard have block the app

A few non-rooted (no rooted) Android 7 and 8 phones from (Huawei, ZTE, Neffos and Samsung) was tested in this simple firewall (NetGuard) experiment. Before the experiment, NetGuard and GlassWire for ...
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1answer
73 views

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

Is there a way or app to restrict some apps on my Android, or the whole device, to only send internet data packets but not receive them back? I want to confuse a game app by doing this. It restricts ...
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3answers
225 views

control per app internet (non-rooted) while using actual VPN?

I am trying all sorts of (non-root) security software that allows me to block internet for apps. so far every one needs some kind of fake VPN to gain access to traffic, I guess so no root is needed. I ...
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1answer
320 views

Will the new changes to Android 9 cause firewall apps that use VPN to manage network obsolete

Firewall apps use VPN to manage network (to allow or disallow apps to connect to the Internet via Wifi or Mobile Data), mainly is for phones that are not rooted. However, the article (https://www....
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1answer
159 views

How to prevent phone to install bloatware automatically

I have a THL T9 Plus. I just wonder, why are applications installed automatically in background. I already installed NoRoot Firewall and Avira Antivirus. These are in most cases "HotKnotBean" and "...
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0answers
37 views

How can I troubleshoot a very slow initial connection when web browsing on WiFi?

This has been bugging me for quite some time. When connected to my home WiFi, web connections take a long time to initially establish (like ~10 seconds+) on two separate Android phones (OnePlus 3, ...
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0answers
53 views

AFwall+ doesn't work on restricted user

I installed AFwall+ as admin with a rooted device & it works very well; but I created a restricted user now & this AFwall+ is not working in user, any tip?
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932 views

How can I Disable Background Data Usage for 'Android OS'?

I recently rooted my phone so that I could use AFWALL+ to disable Background & Foreground Data Usage for everything except the Browser, and it is working fine for all apps except for a package ...
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0answers
765 views

How can I setup a local SOCKS5 proxy that doesn't require Android VPN service?

I need a local SOCKS5 proxy server that doesn't use the Android VPN service. Why? Because I want to chain it with the no-root firewall NetGuard. NetGuard already uses the Android VPN service. ...
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0answers
246 views

How to share mobile internet with a friend and keep noroot firewall running?

Friend's smartphone can only access internet if I stop "noroot firewall" app, while he is connected thru wifi hotspot here. While it is running, no log is shown to friend's blocked accesses. What I ...
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0answers
56 views

Why is my android phone portscanning my PC?

I have bitdefender whining about my PC being portscanned. The logs show that it is coming from my android phone (which has static address). Is that normal? How can i figure out the app that is doing ...
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2answers
436 views

Afwall+ Android Firewall for multiuser

Hi guys After rooting my andoid phone to prevent excessive data usage by Android system and installed AFWall+ that is based on iptables. U have two users on device both account are handled by me by ...
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2answers
58 views

Is there a way to test if a firewal (AFwall) l is blocking a specific app?

I installed AFwall+ to block internet connection for my keyboard. Is there a way I can test if this is actually working? The keyboard is Swifkey.
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25 views

How to limit app using wifi from shell

The Android root firewalls didn't work on my android emulators, How can I limit app using wifi using shell?
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1answer
70 views

How can I prevent apps sending cleartext over open Wi-Fi without using a VPN service?

Sending cleartext data over an open Wi-Fi network, or an encrypted network controlled by someone you don't trust, is very bad for security. This has been discussed here previously. The usual solution ...
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3answers
3k views

How to use a firewall AND a VPN?

I'm using the only open source firewall for Android: NetGuard and would like to use a VPN in addition. Is this possible? If so: how? Both types of apps typically use virtual VPN tunnels. NetGuard has ...
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3answers
668 views

Anyway to split apps sharing an UID?

For a while, I had an exclamation mark instead of a signal status in the top bar, and some apps didn't realize they were connected to Internet when other worked perfectly. Thanks to AFWall+ logs, I ...
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1answer
2k views

Which apps/services needs to be whitelisted when using AFWall+ firewall?

I installed this root firewall app on my android but now some services are not working properly. For example, I liberated full access to Google play store on it and also Google play services but when ...
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1answer
754 views

AFWALL+ doesn't block apps when on WiFi

I'm currently running AfWall+ on LineageOS (Android 7.1.2) and seem to have a problem with this app. When I'm on WiFi it doesn't stop anything it's supposed to (works just fine on mobile). Can ...
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1answer
306 views

Is Mobiwol incompatible with WiFi networks, e.g. my home network?

I recently installed Mobiwol, following this answer, but now, my WiFi doesn't work. I haven't blocked any system apps from accessing the internet, but still, no WiFi. I looked at the FAQ for Mobiwol, ...
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2answers
670 views

How to run a firewall and an AdBlocker on a non-rooted phone at the same time?

I have a non-rooted Android phone and would like to use both a Firewall and an Adblocker at the same time. How can I do this? I could only find Firewalls and Adblockers for non-rooted phones that use ...
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1answer
298 views

Can't connect to college WiFi even after changing the MAC address

First of all this is completely for education purpose, there is no intension to access college Internet without official permissions. So In my college, WiFi is only accessible via laptops. Students ...
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1answer
195 views

Fake missing network connection for single app

I have an app that I don't want to have network access. It does work when I put the phone in plane mode, but simply blocking it with AFWall causes it to hang, probably waiting for network replies. It ...
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0answers
431 views

List of domains used by Google Maps API Family (Firewall Config)

our corporate config firewall to allow Android Phone use App to Map Location , our programmer use fused location provider API (GPS, Network etc) to Map , but the Phont is in the internal network,and ...
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1answer
43 views

Faced alot of bugs fter uninstalling root firewall

Since I uninstalled root firewall, I'v been facing alot of bugs concerning network connectivity; I lost tethering access and the interbet became so slow. Even browsers have reported "connection ...
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1answer
632 views

Is it possible to give root access to some apps without unrooting smartphone?

Is it possible to create an app to bypath unrooted phone to will seen like rooted phone for those apps who needs root access by that app one must be able to give permission to those specific apps who ...
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0answers
333 views

What URLs are needed to use “Ok Google”?

I own a fire tablet what I lock ALL internet traffic for using my router configuration. Works as expected. But while I need no Internet at all on that device I want to use "Ok Google" which itself ...
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1answer
448 views

Firewall software not working as expected on Samsung Galaxy S5 [G900H]

I bought a Samsung Galaxy S5 [G900H] and I installed custom rom from here to get rid of most unwanted applications and having a pure and de-bloated android on my smartphone. After installing this rom ...
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62 views

Block 4g when WiFi is available, and limit access to programs

What's the best way to config it? If WiFi is available, 4g remains locked. When WiFi isn't available, use 4g, but only for Watsupp and no video.
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1answer
764 views

How to prevent Internet access in NetGuard, “Allow” checkboxes greyed out

In Android 6, I want to prevent some apps from using the Internet, so I installed NetGuard. Let's say for instance that I want to prevent Sky Map from accessing the Internet. Where should I click? As ...
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1answer
966 views

How can I block incoming connections?

I've been looking for a firewall app for Android for a couple hours now and all I could find is apps that only let me block outgoing connections (for specific apps). Is there any way to set which ...
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1answer
1k views

What is an easy method to test whether UDP traffic is blocked?

What is an easy method for an Android device to tell whether a data connection (either WiFi or mobile data alone) has UDP traffic blocked? Many corporate and public access points restrict UDP access, ...
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2answers
3k views

Internet connection checking blocked by AFWall+?

I have recently installed Android 6 on my Nexus. I also have AFWall+ for [un]blocking selected application from accessing internet. However, every time I connect to a wifi an exclamation mark will ...
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0answers
312 views

Terraria Server Hosting Problem

I want to host a game on the same network to play with my friends. I want to use Wi-Fi Direct and Terraria for Android (of course) but when they connect to me I can join their servers but they can't ...
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0answers
4k views

How does cLock retrieve the weather information?

I'm running a Cyanogenmod 12.1 nightly with AFWall 2.0.0 installed. AFWall seems to work as expected, except for the Yahoo! Weather service integrated in the cLock widget!? Even if the firewall is ...
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0answers
3k views

How to filter IP address in a hotspot/tether

For non rooted phone IP can be filtered/blocked by using a firewall like NoRoot firewall. Every apps in the pthone can be controlled this way. But when mobile data is shared with other devices (like ...
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2answers
418 views

SSHelper Server not reachable

SSHelper SSH server works very nice on my old Samsung S2. But it does not work on a newer device of my son. I installed no firewall on the new device. Is there some restriction which does not allow ...
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3answers
18k views

Blocking 'Android System,Battery Warning,com.media tek,Common Data Service…' from connecting to the Internet

I am using NoRoot Firewall to block Internet access to some apps. It recently notified me that this/these app(s) are attempting to access the Internet: "Android System,BatteryWarning,com.media tek,...
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1answer
2k views

Block mobile internet access except portable hotspot without rooting my phone

I've seen many articles and tried many applications like 'mobiwol' 'droidwall' 'avast antivirus' 'foxfi'. What my problem is that I've a very limited mobile data and I want to use it with my laptop ...
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0answers
141 views

unable to connect to my nexus 10 with android 4.4 and cyanogenmod with a remote desktop manager

Hello android users and developers. I would like to give a developer temporary access to my tablet so he can help me solve a problem. On the tablet is running android 4.4 + cyanogen mod 11. I have ...
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1answer
315 views

Allowing SSH connection to Android Devices with Droidwall installed

I've installed SSHDroid and Droidwall on my Android device. I know that SSHDroid won't work if Droidwall is enabled. Is there's anyway to list SSH connection in Droidwall whitelist? So, I can connect ...
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0answers
155 views

Any No Root Firewalls, from Major Security Vendors?

This question is "only" concerning no root firewalls, which are currently available from Major Security Vendors (such as Symantec, Comodo, Avast, McAfee, etc...) AND which can filter based on DNS/host ...
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1answer
8k views

How can I add iptables rules that persist across reboots?

I want to add an iptables rule on my Android phone. I used: iptables -t nat -A PREROUTING -p 6 -d 192.168.66.1 --dport 80 -j DNAT --to 192.168.66.1:808 ...as root. This rule can be checked in adb ...
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1answer
6k views

AFwall+: Why does the Kernel need an internet connection all the time?

Since I started using AFWall+ (a firewall based on iptables) on Android, I was wondering why the Linux kernel tries to connect to the internet all the time? Allthough blocking the kernel I didn't ...
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0answers
805 views

Sudden surge in network usage by unknown processes

Phone Details: Model: Nexus 4 (mako) Current ROM: Paranoid Android 4.3-BETA2 Xposed Present? Yes I flashed the new Paranoid Android 4.4- BETA1 today and noticed my phone downloading something. I had ...