qtopie.rw qtopie

The purpose of this document is to get you familiar with the concepts and command line tools involved with connecting to the internet using modern 4G LTE modems on both Debian/Ubuntu and OpenWRT.

This writeup is based on my experiences with the Sierra Wireless AirPrime MC7455 modem and a Calyx (Sprint) SIM card, but it should apply to most modern 4G LTE modems.

High level overview

These are the steps required:

Physically connect antennas

New generator

I created a new htaccess generator for angular apps that makes it easier for you to create the optimal htaccess file: https://julianpoemp.github.io/ngx-htaccess-generator/

The goal of this generator is to create the optimal .htaccess file for Angular apps easily. By default the generator creates an .htaccess file that solves the route redirection issue. To make it easier for you I created a kind of interview mode with some questions. As an additional feature the generator supports adding exclusions for example if you have installed a blog in a subdirectory of your web application and more!

The generator 😁: https://julianpoemp.github.io/ngx-htaccess-generator/

The project: https://github.com/julianpoemp/ngx-htaccess-generator

On Mac

Download, but don't run, the Sierra installer from the Mac App Store. This places the installer at /Applications/Install\ macOS\ Sierra.app/.

Now run the following commands to build a suitable VM image from the installer:

git clone https://github.com/jonanh/osx-vm-templates
cd osx-vm-templates/packer

sudo ../prepare_iso/prepare_vdi.sh -D DISABLE_REMOTE_MANAGEMENT -o macOS_10.12.vdi /Applications/Install\ macOS\ Sierra.app/ .

This was tested on a ThinkPad P70 laptop with an Intel integrated graphics and an NVIDIA GPU:

lspci | egrep 'VGA|3D'
00:02.0 VGA compatible controller: Intel Corporation Device 191b (rev 06)
01:00.0 VGA compatible controller: NVIDIA Corporation GM204GLM [Quadro M3000M] (rev a1)

A reason to use the integrated graphics for display is if installing the NVIDIA drivers causes the display to stop working properly. In my case, Ubuntu would get stuck in a login loop after installing the NVIDIA drivers. This happened regardless if I installed the drivers from the "Additional Drivers" tab in "System Settings" or the ppa:graphics-drivers/ppa in the command-line.

How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SLL rating)

Virtual hosts

Let's say you want to host domains first.com and second.com.

Create folders for their files:

Table Of Content

Skip to the relevant sections if needed.

2-min tutorial to do it the quick-and-dirty-way
Concepts for resolving Git conflicts
Setting up different editors / tool for using git mergetool
- Finding out what mergetool editors are supported
mergetool simple code example for vimdiff
- Resolving conflict from a Git pull
Other great references and tutorials

	# Root.
	$ docker exec -u 0 i -t {container_id/image_name} bash

	or

	# Default container's user.
	$ docker exec i -t {container_id/image_name} bash

	#dump http response
	tcpdump -s 0 -A 'src port 80 and tcp[((tcp[12:1]&0xf0)>>2):4]=0x48545450'
	tcpdump -s 0 -A 'src port 80 and tcp[((tcp[12:1]&0xf0)>>2):4]='$(python -c "print '0x' + ''.join(hex(ord(i))[2:] for i in 'HTTP')")

	#dump http post request, following two are equal, 0x504f5354 <-> POST
	tcpdump -s 0 -A 'dst port 80 and tcp[((tcp[12:1]&0xf0)>>2):4]=0x504f5354'
	tcpdump -s 0 -A 'dst port 80 and tcp[((tcp[12:1]&0xf0)>>2):4]='$(python -c "print '0x' + ''.join(hex(ord(i))[2:] for i in 'POST')")

	#dump http get request
	tcpdump -s 0 -A 'dst port 80 and tcp[((tcp[12:1]&0xf0)>>2):4]='$(python -c "print '0x' + ''.join(hex(ord(i))[2:] for i in 'GET ')")

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

	package main

	import (
	"flag"
	"io"
	"log"
	"net"
	"net/http"
	"strings"
	)