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225 lines
5.9 KiB
225 lines
5.9 KiB
= VPN!
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Apostolos rootApostolos@swarmlab.io
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// Metadata:
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:description: Intro and Install
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:keywords: sec, tcpdump
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:data-uri:
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:toc: right
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:toc-title: Πίνακας περιεχομένων
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:toclevels: 4
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:source-highlighter: highlight
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:icons: font
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:sectnums:
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{empty} +
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[[cheat-Docker]]
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== Install docker (Home PC)
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HowTo: See http://docs.swarmlab.io/SwarmLab-HowTos/labs/Howtos/docker/install.adoc.html[How to^]
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.NOTE
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[NOTE]
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====
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Assuming you're already logged in
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====
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== VPN
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A ***virtual private network (VPN)*** extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. Applications running on a computing device, e.g., a laptop, desktop, smartphone, across a VPN may therefore benefit from the functionality, security, and management of the private network. Encryption is a common, though not an inherent, part of a VPN connection
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https://en.wikipedia.org/wiki/Virtual_private_network[More: wikipedia]
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image::495px-VPN_overview-en.svg.png[VPN connectivity overview]
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.NOTE
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[NOTE]
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====
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**OpenVPN** is an open-source software that implements virtual private network (VPN) techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. It uses a custom security protocol that utilizes SSL/TLS for key exchange. It is capable of traversing network address translators (NATs) and firewalls. It was written by James Yonan and is published under the GNU General Public License (GPL).
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https://en.wikipedia.org/wiki/OpenVPN[More: wikipedia]
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====
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== Create VPN
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.create-vpn.sh
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[source,bash]
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----
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#!/bin/bash
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IP=127.0.0.1 # Server IP // <1>
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P=1194 # Server Port // <2>
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OVPN_SERVER='10.80.0.0/16' # VPN Network // <3>
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#vpn_data=/var/lib/swarmlab/openvpn/openvpn-services/ # Dir to save data ** this must exist **
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vpn_data=$PWD/openvpn-services/ // <4>
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if [ ! -d $vpn_data ]; then
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mkdir -p $vpn_data
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fi
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NAME=swarmlab-vpn-services # name of docker service // <5>
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DOCKERnetwork=swarmlab-vpn-services-network # docker network
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docker=registry.vlabs.uniwa.gr:5080/myownvpn # docker image
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docker stop $NAME #stop container
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sleep 1
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docker container rm $NAME #rm container
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# rm config files
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rm -f $vpn_data/openvpn.conf.*.bak
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rm -f $vpn_data/openvpn.conf
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rm -f $vpn_data/ovpn_env.sh.*.bak
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rm -f $vpn_data/ovpn_env.sh
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# create network
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sleep 1
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docker network create --attachable=true --driver=bridge --subnet=172.50.0.0/16 --gateway=172.50.0.1 $DOCKERnetwork
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#run container see ovpn_genconfig
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docker run --net=none -it -v $vpn_data:/etc/openvpn -p 1194:1194 --rm $docker ovpn_genconfig -u udp://$IP:1194 \
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-N -d -c -p "route 172.50.20.0 255.255.255.0" -e "topology subnet" -s $OVPN_SERVER // <6>
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# create pki see ovpn_initpki
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docker run --net=none -v $vpn_data:/etc/openvpn --rm -it $docker ovpn_initpki // <7>
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# see ovpn_copy_server_files
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#docker run --net=none -v $vpn_data:/etc/openvpn --rm $docker ovpn_copy_server_files
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#create vpn see --cap-add=NET_ADMIN
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sleep 1
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docker run --detach --name $NAME -v $vpn_data:/etc/openvpn --net=$DOCKERnetwork --ip=172.50.0.2 -p $P:1194/udp --cap-add=NET_ADMIN $docker // <8>
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sudo sysctl -w net.ipv4.ip_forward=1
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#show created
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docker ps
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----
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<1> *localhost* inside of a container will resolve to the network stack of this container
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<2> Port
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<3> Specify Addresses and Netmasks for VPN Clients
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<4> Directory to mount data
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<5> Name of docker services
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<6> Create config
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<7> keys
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<8> Run docker vpn service
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== Create user
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.create-user.sh
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[source,bash]
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----
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USERNAME=test1
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vpn_data=$PWD/openvpn-services/
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docker=registry.vlabs.uniwa.gr:5080/myownvpn
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docker run -v $vpn_data:/etc/openvpn --rm -it $docker easyrsa build-client-full $USERNAME nopass
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docker run -v $vpn_data:/etc/openvpn --log-driver=none --rm $docker ovpn_getclient $USERNAME > $USERNAME.ovpn
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----
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[source,bash]
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.add to $USERNAME.ovpn file
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----
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client
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nobind
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dev tun
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comp-lzo
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resolv-retry infinite
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keepalive 15 60
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remote-cert-tls server
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remote 192.168.1.5 1194 udp // <1>
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float
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----
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<1> Host machine's IP. Not Docker Container IP Address
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== rm vpn user
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.rm-user.sh
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[source,bash]
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----
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#!/bin/bash
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CLIENTNAME=test1
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U=$CLIENTNAME
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vpn_data=$PWD/openvpn-services/
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docker=registry.vlabs.uniwa.gr:5080/myownvpn
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rm -f $vpn_data/pki/reqs/$CLIENTNAME.req
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rm -f $vpn_data/pki/private/$CLIENTNAME.key
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rm -f $vpn_data/pki/issued/$CLIENTNAME.crt
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rm -f $vpn_data/server/ccd/$CLIENTNAME
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rm -f $vpn_data/ccd/$CLIENTNAME
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pem=$(sudo grep "CN=$U$" $vpn_data/pki/index.txt | cut -f4)
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rm -f $vpn_data/pki/certs_by_serial/$pem.pem
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sed -i "/CN=$U$/d" $vpn_data/pki/index.txt
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echo $pem
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docker run -v $vpn_data:/etc/openvpn --log-driver=none --rm -it $docker ovpn_revokeclient $CLIENTNAME remove
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rm -f $vpn_data_user_config/$CLIENTNAME.ovpn
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rm -f $vpn_data_user_config1/$CLIENTNAME.ovpn
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----
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== show all vpn users
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.show-user.sh
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[source,bash]
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----
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NAME=swarmlab-vpn-services # name of docker service
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docker exec -it $NAME ovpn_listclients
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----
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== show all connected vpn users
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.show-conn-user.sh
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[source,bash]
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----
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NAME=swarmlab-vpn-services # name of docker service
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docker exec -it $NAME cat /tmp/openvpn-status.log
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----
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== client connect
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.client connect
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[source,bash]
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----
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openvpn --config ./clientfile.vpn
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----
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:hardbreaks:
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{empty} +
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{empty} +
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{empty}
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:!hardbreaks:
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'''
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.Reminder
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[NOTE]
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====
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:hardbreaks:
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Caminante, no hay camino,
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se hace camino al andar.
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Wanderer, there is no path,
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the path is made by walking.
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*Antonio Machado* Campos de Castilla
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====
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