Adrian Torrie adriantorrie

ProxyJumping

Introduction

ProxyJumping is a method used to get access to a terminal in a private network via SSH.

First, you SSH into a JumpGate (a SSH server exposed to the internet), and then use that JumpGate to pass through a SSH connection to a machine on the JumpGate's local network. By the end of this guide, you should be able to seamlessly connect to a remote private host through a JumpGate with one parameter in a ssh command.

Security should always be paramount when establishing connections like this because the password of a JumpGate can and will be brute-forced by bots on the internet constantly.

Compatiblilty notes

The provided client-side commands are intended for PowerShell. Open PowerShell by right-clicking on the start menu button and selecting Windows Powershell.

Sometimes it is useful to route traffic through a different machine for testing or development. At work, we have a VPN to a remote facility that we haven't bothered to fix for routing, so the only way to access a certain machine over that VPN is via an SSH tunnel to a machine that is reachable over the VPN. Other times, I have used this technique to test internet-facing requests against sites I am developing. It is pretty easy, and if you don't use firefox regularly, you can treat Firefox as your "Proxy" browser and other browsers can use a normal configuration (Although you can also configure an entire system to use the proxy, other articles exists that discuss this potential).

Open a terminal

TL;DR

Create a backup:

pg_dumpall > mybackup.sql

Perform the upgrade:

sudo pg_dropcluster 9.4 main --stop

	# Use envFrom to load Secrets and ConfigMaps into environment variables

	apiVersion: apps/v1beta2
	kind: Deployment
	metadata:
	name: mans-not-hot
	labels:
	app: mans-not-hot
	spec:
	replicas: 1

	# Try to get futures working with Zipline

	import pytz
	import pandas as pd
	import matplotlib.pyplot as plt
	import Quandl
	from zipline.api import *
	from zipline.algorithm import TradingAlgorithm
	from zipline.finance.trading import TradingEnvironment

	import os
	import re

	from nbconvert.nbconvertapp import NbConvertApp
	from nbconvert.postprocessors.base import PostProcessorBase


	class CopyToSubfolderPostProcessor(PostProcessorBase):
	def __init__(self, subfolder=None):
	self.subfolder = subfolder

	# http://stackoverflow.com/questions/14075581/git-undo-all-uncommitted-changes
	git reset
	git checkout .
	git clean -fdx
	git pull

	# make all shell files in the repo /bin directory executable
	find ./bin -name "*.sh" -exec chmod u+x {} \;

	#!/bin/bash
	# Replace git tags to semantic version
	# e.g. v1.0.0 -> 1.0.0

	for vtag in $(git tag -l \| awk '$0 ~ /^v/')
	do
	tag=$(echo $vtag \| sed -e 's/^v//')
	git tag $tag $vtag
	git tag -d $vtag
	git push origin :refs/tags/v$tag

	###############################################################################
	# Helpful Docker commands and code snippets
	###############################################################################

	### CONTAINERS ###
	docker stop $(docker ps -a -q) #stop ALL containers
	docker rm -f $(docker ps -a -q) # remove ALL containers
	docker rm -f $(sudo docker ps --before="container_id_here" -q) # can also filter

	# exec into container