I have read a blog post, where you can build your own privacy proxy server built on Raspberry PI. The post got me thinking about how I can use this to protect my privacy on my Android phone, and also get rid of those annoying ads.
Since I own a Samsung Galaxy S3 LTE with Android 4.3 (with a HW based Knox counter), rooting the phone now means you break Knox, and loose warranty. Past the point of no return ...
This means I have to solve this without root. Luckily newer Androids support VPN without rooting, but setting a mandatory system-wide proxy is still not possible without root.
But thanks to some iptables magic and Privoxy, this is not a problem anymore :)
The ingredients to build your own privacy protection proxy:
- One (or more) cheap VPS server(s)
- a decent VPN program
- Privoxy
- iptables
VPS server
To get the cheap VPS server, I recommend using Amazon EC2, but choose whatever you like. The micro instance is very cheap (or even free), and has totally enough resources for this task. I'm using the Ubuntu free tier now and it works like a charm. And last but not least Amazon has two-factor authentication! You can set up an Ubuntu server under 10 minutes. Use the AWS region nearest to you, e.g. I choose EU - Ireland.
For the VPN program, I recommend the free version of the OpenVPN AS (EDIT: be sure to use OpenVPN AS 2.0.6 or later, both on the server and the client). Easy to set-up quick start guide is here, GUI based configuration, and one-click client installer for Android, iOS, Windows, Linux, OSX. The Ubuntu installer packages are here.
The most important settings:
- I prefer to use the TCP 443 and UDP 53 ports for my OpenVPN setup, and let the user guess why.
- For good performance, UDP is preferred over TCP.
- VPN mode is Layer 3 (routing/NAT).
- Don't forget to allow the configured VPN ports in the AWS firewall (security groups).
Other VPN settings:
- Should VPN clients have access to private subnets (non-public networks on the server side)? - Yes
- Should client Internet traffic be routed through the VPN? - Yes
Privoxy
The next component we have to install and configure is Privoxy. As usual, "apt-get install privoxy" just works. The next step is to configure privoxy via /etc/privoxy/config file, there are two options to change:- listen-address your.ip.add.ress:8118
- accept-intercepted-requests 1
Beware not to allow everyone accessing your Privoxy server in the AWS EC2 security groups, be sure it is reachable only to VPN users!
After everything is set, start privoxy with "service privoxy start", and add it to the autostart "update-rc.d privoxy defaults".
After everything is set, start privoxy with "service privoxy start", and add it to the autostart "update-rc.d privoxy defaults".
Iptables
And the final step is to configure your iptables chain to forward every web traffic from the VPN clients to the Privoxy server:
iptables -t nat -A PREROUTING -s 5.5.0.0/16 -p tcp -m multiport --dports 80,8080,81 -j DNAT --to-destination your.ip.add.ress:8118
Optionally you can block access to all other ports as well, and what does not go through your Privoxy won't be reachable.
Based on your Linux distribution and preference, you might make this rule persistent.
Final test
Now you can connect to the VPN server from your Android device.
After connecting, the final results can be seen in the following screenshots. And yes, there is a reason I chose Angry Birds as an example.
After logging in from a client, you get the following nice packages to install on your device:
Angry Birds without Privoxy |
Angry Birds with Privoxy |
Stupid flashlight app with ad |
Stupid flashlight app with Privoxy |
Spoiler alert
If you are afraid of NSA tracking you, this post is not for you. If you want to achieve IP layer anonymity, this post is not for you. As long as you are the only one using that service, it should be trivial to see what could possibly go wrong with that.
Known issues
Whenever the Internet connection (Wifi, 3G) drops, the VPN connection drops as well, and your privacy is gone ...
Sites breaking your privacy through SSL can still do that as long as the domain is not in the Privoxy blacklist.
Additional recommendation
If you are using OSX or Windows, I can recommend Aviator to be used as your default browser. It is just great, give it a try!
PS: There are also some adblock apps removed from the official store which can block some ads, but you have to configure a proxy for every WiFi connection you use, and it is not working over 3G.
- Hacker Tools Windows
- Hacking Tools
- Hacking Tools For Pc
- Hack Tool Apk
- Ethical Hacker Tools
- Hacker Tools Online
- Hack App
- Hacking Tools Download
- Hacking Apps
- Pentest Tools Bluekeep
- Best Hacking Tools 2020
- Beginner Hacker Tools
- Install Pentest Tools Ubuntu
- Hacking Tools Usb
- Physical Pentest Tools
- Pentest Reporting Tools
- Hack And Tools
- Black Hat Hacker Tools
- Pentest Tools Tcp Port Scanner
- Tools 4 Hack
- Underground Hacker Sites
- Growth Hacker Tools
- Hacker Tools Github
- Pentest Recon Tools
- Hacks And Tools
- Pentest Tools Website
- Hacking Tools For Pc
- Hacking Tools And Software
- Hacking Tools For Pc
- Hack And Tools
- Hacking App
- Pentest Tools Url Fuzzer
- Bluetooth Hacking Tools Kali
- Pentest Tools Nmap
- Hack Rom Tools
- Pentest Tools For Ubuntu
- Hack Tool Apk No Root
- Hacker Tools For Mac
- Free Pentest Tools For Windows
- Tools Used For Hacking
- Hacker Tools Windows
- Pentest Tools Apk
- Best Pentesting Tools 2018
- Hacking Tools And Software
- Hacking Tools For Mac
- Hacker Tools Apk
- How To Install Pentest Tools In Ubuntu
- Hacker Tools List
- Hak5 Tools
- Game Hacking
- Hacker Security Tools
- New Hack Tools
- Hacking Tools Windows 10
- Hacker Tools Hardware
- Pentest Tools Github
- How To Hack
- Pentest Tools Nmap
- Hacking Tools Pc
- Hacker Tools For Mac
- Hacking Tools For Kali Linux
- Hacker Tools For Pc
- Pentest Automation Tools
- Hacking Tools For Pc
- Hack Tools
- Pentest Tools For Android
- What Are Hacking Tools
- Hacker Tools For Ios
- Hacking Tools Download
- Hacking Tools Free Download
- Free Pentest Tools For Windows
- Pentest Tools Online
- Pentest Tools Free
- Black Hat Hacker Tools
- Nsa Hack Tools Download
- Hacking Tools Hardware
- Best Hacking Tools 2019
- Pentest Tools Url Fuzzer
- Hacking Tools Mac
- Hack Tool Apk No Root
- Pentest Tools Subdomain
- Hacker Techniques Tools And Incident Handling
- Hacking Apps
- Pentest Reporting Tools
- Hak5 Tools
- Hack Tools Pc
- Hacking Tools Free Download
- Pentest Tools Windows
- Hacker Hardware Tools
- Pentest Tools Nmap
- Hack Tools
- Hack Tools Mac
- Hack Website Online Tool
- Github Hacking Tools
- Hack Tools 2019
- Hacking Tools For Windows Free Download
- Hacks And Tools
- Best Pentesting Tools 2018
- Hacking App
- Hack Tools For Windows
- Nsa Hack Tools
- Hacker Tools For Windows
- Free Pentest Tools For Windows
- Hacker Tools Github
- Hacker Tools Apk
- Hack Rom Tools
- Hacking Tools Windows 10
- Nsa Hack Tools
- Pentest Tools Apk
- What Are Hacking Tools
- Hack Tool Apk No Root
- Pentest Tools List
- Pentest Tools Open Source
- Hacking Tools Kit
- Termux Hacking Tools 2019
- Hacker Tools Hardware
- Hacker Security Tools
- Game Hacking
- Hack Tools Pc
No comments:
Post a Comment