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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14 views

Using NetGuard, what app(s)/service(s) can be restricted to prevent system updates?

I've been using NetGuard for a little while now, and I've really liked it so far. I hate the forced system updates which seem to come more and more frequently. For a handful of reasons, I'd like to ...
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53 views

How can I make my rooted Android 7 phone as secure as possible for financial transactions?

The latest security update patches for my phone was in 2017. My phone is rooted. What steps can I take to make it as secure as possible to be able to safely use financial apps where I'd be transacting ...
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23 views

In AFWall+, how do you block everything by default?

I want the default to be blocked unless I specifically allow that app. I understand you can tick all what you want blocked or not. But, what I want is for any app that gets installed to be ...
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Can I implement firewall-like internet blocking from ADB on a per app basis on stock Android?

Instead of using 3rd party app freezers, I've been using "pm disable-user" / "pm uninstall" for years to disable/uninstall bloatware. However, some apps, if uninstalled (or even ...
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23 views

How do I block my external ip adress from connecting to a remote LAN?

My cell is being broadcast on a LAN. I rooted my phone and am using afWall+. I tried iptables -A OUTPUT -s 192.0.0.4 -j DROP It didn't work. Am I even on the right track? My cellphone's external IP ...
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19 views

Port to port routing in rooted android device locally

I want to route the incoming TCP packets of one specific IP. Packet can arrive on any port on android. Packet needs to be forwarded to one specific port on the same device, Without using middleware ...
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1answer
82 views

how to identify on command line terminal emulator apps and packages that have active network connections [duplicate]

I tried this using an app and I am able to identify most apps and their network connections however there are certain apps listed as '?' so apparently it is not able to identify a package name I ...
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97 views

AFWall+ block entire internet in Oasisfeng Island (work mode)

I have a OnePlus 6 running Android / OxygenOS 10 and have AFWall+ installed. It works fine as long as I don't use the Island app inside the island (v.4.54) of OasisFeng. I set finally a profile which ...
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21 views

Is it possible to change the userID of something like Fused Location Provider?

I have a bunch of apps bundled under userID on my stock rom, including Fused Location Provider. Since I'm using AFWall+ to block said userID to block said apps - it also breaks my location detection ...
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52 views

“System” is trying to access Internet

I am using OnePlus 3T, Android 9. Recently I installed an app called "NoRoot Firewall" to prevent the apps from accessing the internet. I explicitly allowed and denied access to internet for some apps ...
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1answer
218 views

Block app internet acces on Galaxy S7?

Is it possible to block an app from accessing internet (both wifi and data) on Galaxy S7 with Android 8? Without using any external firewall app. Thanks.
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677 views

Whatsapp calls not working on a specific Wifi

I live in Germany and I can't make a whatsapp call whenever I am connected to my home's wifi. It just goes on "connecting". Whatsapp messages work and whatsapp calls work on other wifis and my phone ...
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88 views

Proxy server for sharing VPN and firewall over tethering

I am also working on getting that proxy on my mobile working properly. For the reason that my mobile has become my main internet connection. This is cheaper and the internet is a lot faster via my ...
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1answer
3k views

How to send all internet traffic to a SOCKS5 proxy server in local network?

I got the inspiration here. It looks like AFWall+ is able to create a NAT forwarding policy to keep all traffic going through a SOCKS5 proxy and fool Google apps into thinking they are not connected ...
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528 views

What are the privacy downsides to using Google's Gboard keyboard for Android?

For several reasons, I do what I can to avoid using Google products. But I do currently use the Android OS (at least for now). One thing I like about Android is being able to use any keyboard app ...
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780 views

System firewall setting?

I travel and live with someone all the time. Cast is enabled across the system and it's too easy to inadvertently cast something... embarrassing (just a click and it's on the TV). I found this design ...
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509 views

AFWall+ not blocking consistently

I'm running a rooted pixel 3 (Magisk) with the "liboemcrypt disabler" module for running Netflix, Magisk Hide and the dg.db edit to disable attestation for running Google Pay. The firewall will work ...
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1answer
2k views

Is There A Mobile Hotspot App With A Firewall to Block Incoming Connections?

I've been using the Android mobile hotspot to get an Internet connection while traveling. The stock hotspot is fine for my laptop which is firewalled, but there are a few devices (smart TV, game ...
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96 views

Android firewall? Blackhole? One IP unreachable

I have a device, an ESP8266-like, connecting my automower to my wan. If I hardcode the address to 192.168.1.48, it is accessible from my phone and my laptop, among others I guess. If I hardcode the ...
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50 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
264 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
1k 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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1answer
446 views

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

A few non-rooted (no rooted) Android 7 and 8 phones from (Huawei, ZTE, Neffos and Samsung) were tested in this simple firewall (NetGuard) experiment. A selection of apps (including apps from the phone ...
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1answer
421 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
1k 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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2answers
1k views

Will the new changes to Android 9 cause the VPN based firewall apps become 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, this article mentions: As ...
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1answer
230 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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169 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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69 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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619 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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61 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
1k 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
102 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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26 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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78 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
8k 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
896 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
3k 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
1k 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
179 views

Block internet access before firewall starts at boot

I have an old Android phone with Ice Cream Sandwich and DroidWall as a firewall, which makes sure that apps can't use the 3G unless I enable it for that app. DroidWall starts on boot but there is a ...
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1answer
395 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
1k 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
431 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
269 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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569 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
50 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
692 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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449 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
490 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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79 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.