Ivan Monteiro Cantalice ivanmonteiro

GNU/Linux UFW VPN kill switch tutorial

This is a quick guide for setting up a kill switch using UFW (Uncomplicated FireWall). It is assumed you are using OpenVPN and optionally Network-Manager with network-manager-openvpn.

1. (Optional) IP Addresses

Before we can start we're going to need the IP address (or the IP addresses) of your VPN so that we can whitelist those later on, write them down. They are obviously going to be different for every VPN and VPNs with multiple servers, so I'll leave this up to you.

2. Install UFW

On some systems UFW is installed and enabled by default (Ubuntu, for example). Installation procedure is going to be different for every distribution of GNU/Linux, but it's usually something like

Mysqldump from Docker container

docker exec -i mysql_container mysqldump -uroot -proot --databases database_name --skip-comments > /path/to/my/dump.sql

OBS

This will generate a dump.sql file in your host machine. Awesome, eh?
Avoid using --compact on your dump. This will make MySQL check your constraints which will cause troubles when reading your file (damm you MySQL). And don't use --force to fix this scenario: recreate your dump without --compact ¯_(ツ)_/¯

Nginx upstream HTTP keepalive config example

As per Nginx documentation, the key directives of proxy_http_version and proxy_set_header need to be set as per below:

upstream backend {
	server 127.0.0.1:8080;
	keepalive 8;
}

	import java.util.List;

	import android.content.Context;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.BaseAdapter;

	/**
	* Adapter that is backed by an in memory List.