ovpn_copy_server_files: Use short flags with rm

* The busybox tool in the alpine distro doesn't support long flags.

.travis.yml

@@ -0,0 +1,21 @@
+# Disallowing packages: openvpn
+# If you require these packages, please review the package approval process at: https://github.com/travis-ci/apt-package-whitelist#package-approval-process
+#addons:
+#    apt:
+#        sources:
+#            - ubuntu-toolchain-r-test
+#        packages:
+#            - openvpn
+
+services:
+    - docker
+
+before_install:
+    - docker --version
+    - docker build -t kylemanna/openvpn .
+    - docker inspect kylemanna/openvpn
+    - docker run kylemanna/openvpn openvpn --version || true # why does it returns 1?
+    - docker run kylemanna/openvpn openssl version
+
+script:
+    - pushd tests && for i in *.sh; do "./$i"; done && popd

Dockerfile

@@ -6,11 +6,11 @@ FROM debian:jessie
 MAINTAINER Kyle Manna <kyle@kylemanna.com>
 
 RUN apt-get update && \
-    apt-get install -y openvpn iptables git-core && \
+    apt-get install -y openvpn iptables curl && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
-# Update checkout to use tags when v3.0 is finally released
-RUN git clone --depth 1 --branch v3.0.0-rc2 https://github.com/OpenVPN/easy-rsa.git /usr/local/share/easy-rsa && \
+RUN mkdir -p /usr/local/share/easy-rsa && \
+    curl -L https://github.com/OpenVPN/easy-rsa/archive/v3.0.0.tar.gz | tar xzf - --strip=1 -C /usr/local/share/easy-rsa easy-rsa-3.0.0/easyrsa3 && \
     ln -s /usr/local/share/easy-rsa/easyrsa3/easyrsa /usr/local/bin
 
 # Needed by scripts
@@ -21,7 +21,7 @@ ENV EASYRSA_VARS_FILE $OPENVPN/vars
 
 VOLUME ["/etc/openvpn"]
 
-# Internally uses port 1194, remap using docker
+# Internally uses port 1194/udp, remap using `docker run -p 443:1194/tcp`
 EXPOSE 1194/udp
 
 WORKDIR /etc/openvpn

LICENSE

@@ -1,661 +1,21 @@
-                    GNU AFFERO GENERAL PUBLIC LICENSE
-                       Version 3, 19 November 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
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-
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-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the work with which it is combined will remain governed by version
-3 of the GNU General Public License.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU Affero General Public License from time to time.  Such new versions
-will be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU Affero General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU Affero General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU Affero General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Affero General Public License for more details.
-
-    You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If your software can interact with users remotely through a computer
-network, you should also make sure that it provides a way for users to
-get its source.  For example, if your program is a web application, its
-interface could display a "Source" link that leads users to an archive
-of the code.  There are many ways you could offer source, and different
-solutions will be better for different programs; see section 13 for the
-specific requirements.
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU AGPL, see
-<http://www.gnu.org/licenses/>.
+The MIT License (MIT)
+
+Copyright (c) 2014 Kyle Manna
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,15 +1,21 @@
 # OpenVPN for Docker
 
+[![Build Status](https://travis-ci.org/kylemanna/docker-openvpn.svg)](https://travis-ci.org/kylemanna/docker-openvpn)
+
 OpenVPN server in a Docker container complete with an EasyRSA PKI CA.
 
 Extensively tested on [Digital Ocean $5/mo node](http://bit.ly/1C7cKr3) and has
 a corresponding [Digital Ocean Community Tutorial](http://bit.ly/1AGUZkq).
 
-Upstream links:
+#### Upstream Links
 
 * Docker Registry @ [kylemanna/openvpn](https://registry.hub.docker.com/u/kylemanna/openvpn)
 * GitHub @ [kylemanna/docker-openvpn](https://github.com/kylemanna/docker-openvpn)
 
+#### Example Service
+
+* [backroad.io](http://beta.backroad.io?utm_source=kylemanna/openvpn&utm_medium=readme&utm_campaign=20150621) - powered by *kylemanna/openvpn*
+
 ## Quick Start
 
 * Create the `$OVPN_DATA` volume container, i.e. `OVPN_DATA="ovpn-data"`
@@ -41,7 +47,7 @@ Upstream links:
 
 * Create an environment variable with the name DEBUG and value of 1 to enable debug output (using "docker -e").
 
-        for example - docker run --volumes-from $OVPN_DATA -d -p 1194:1194/udp --privileged -e DEBUG=1 kylemanna/openvpn
+        docker run --volumes-from $OVPN_DATA -d -p 1194:1194/udp --privileged -e DEBUG=1 kylemanna/openvpn
 
 ## How Does It Work?
 
@@ -105,13 +111,13 @@ packets, etc).
   simplicity.  It's highly recommended to secure the CA key with some
   passphrase to protect against a filesystem compromise.  A more secure system
   would put the EasyRSA PKI CA on an offline system (can use the same Docker
-  image and the script [`ovpn_copy_server_files`](/docs/clients.md) to accomplish this).
+  image and the script [`ovpn_copy_server_files`](/docs/paranoid.md) to accomplish this).
 * It would be impossible for an adversary to sign bad or forged certificates
   without first cracking the key's passphase should the adversary have root
   access to the filesystem.
 * The EasyRSA `build-client-full` command will generate and leave keys on the
   server, again possible to compromise and steal the keys.  The keys generated
-  need to signed by the CA which the user hopefully configured with a passphrase
+  need to be signed by the CA which the user hopefully configured with a passphrase
   as described above.
 * Assuming the rest of the Docker container's filesystem is secure, TLS + PKI
   security should prevent any malicious host from using the VPN.

bin/ovpn_copy_server_files

@@ -1,7 +1,9 @@
 #!/bin/bash
-## @licence AGPLv3 <https://www.gnu.org/licenses/agpl-3.0.html>
+## @licence MIT <http://opensource.org/licenses/MIT>
 ## @author Copyright (C) 2015 Robin Schneider <ypid@riseup.net>
 
+set -e
+
 if [ -z "$OPENVPN" ]; then
     export OPENVPN="$PWD"
 fi
@@ -10,25 +12,30 @@ if ! source "$OPENVPN/ovpn_env.sh"; then
     exit 1
 fi
 
-TARGET="/tmp/openvpn_${OVPN_CN}"
+TARGET="$OPENVPN/server"
 if [ -n "$1" ]; then
     TARGET="$1"
-else
-    TARGET="$OPENVPN/server"
 fi
+mkdir -p "${TARGET}"
 
-rsync --recursive --verbose --prune-empty-dirs \
-    --exclude="clients" \
-    --exclude="server" \
-    --include "*/" \
-    --include "/pki/private/${OVPN_CN}.key" \
-    --include "/pki/ca.crt" \
-    --include "/pki/issued/${OVPN_CN}.crt" \
-    --include "/pki/dh.pem" \
-    --include "ta.key" \
-    --include "/openvpn.conf" \
-    --include "/ovpn_env.sh" \
-    --exclude="*" \
-    "$OPENVPN/" "$TARGET"
+## Ensure that no other keys then the one for the server is present.
+rm -rf "$TARGET/pki/private" "$TARGET/pki/issued"
+
+FILES=(
+    "openvpn.conf"
+    "ovpn_env.sh"
+    "pki/private/${OVPN_CN}.key"
+    "pki/issued/${OVPN_CN}.crt"
+    "pki/dh.pem"
+    "pki/ta.key"
+    "pki/ca.crt"
+)
+
+# rsync isn't available to keep size down
+# cp --parents isn't in busybox version
+# hack the directory structure with tar
+tar cf - -C "${OPENVPN}" "${FILES[@]}" | tar xvf - -C "${TARGET}"
+
+mkdir -p "$TARGET/ccd"
 
 echo "Created the openvpn configuration for the server: $TARGET"

bin/ovpn_genconfig

@@ -44,6 +44,10 @@ usage() {
     echo " -D    Disable built in external dns (google dns)"
     echo " -N    Configure NAT to access external server network"
     echo " -m    Set client MTU"
+    echo " -t    Use TAP device (instead of TUN device)"
+    echo " -T    Encrypt packets with the given cipher algorithm instead of the default one (tls-cipher)."
+    echo " -C    A list of allowable TLS ciphers delimited by a colon (cipher)."
+    echo " -a    Authenticate  packets with HMAC using the given message digest algorithm (auth)."
 }
 
 if [ "$DEBUG" == "1" ]; then
@@ -57,17 +61,31 @@ OVPN_SERVER=192.168.255.0/24
 OVPN_DEFROUTE=1
 OVPN_NAT=0
 OVPN_DNS=1
+OVPN_DEVICE="tun"
+OVPN_DEVICEN=0
 OVPN_ROUTES=()
 TMP_ROUTES=()
 OVPN_PUSH=()
 TMP_PUSH=()
+OVPN_TLS_CIPHER=''
+OVPN_CIPHER=''
+OVPN_AUTH=''
 
 # Import defaults if present
 [ -r "$OVPN_ENV" ] && source "$OVPN_ENV"
 
 # Parse arguments
-while getopts ":r:s:du:cp:DNm:" opt; do
+while getopts ":a:C:T:r:s:du:cp:DNm:t" opt; do
     case $opt in
+        a)
+            OVPN_AUTH="$OPTARG"
+            ;;
+        C)
+            OVPN_CIPHER="$OPTARG"
+            ;;
+        T)
+            OVPN_TLS_CIPHER="$OPTARG"
+            ;;
         r)
             TMP_ROUTES+=("$OPTARG")
             ;;
@@ -95,6 +113,9 @@ while getopts ":r:s:du:cp:DNm:" opt; do
         m)
             OVPN_MTU=$OPTARG
             ;;
+        t)
+            OVPN_DEVICE="tap"
+            ;;
         \?)
             set +x
             echo "Invalid option: -$OPTARG" >&2
@@ -135,7 +156,8 @@ fi
 
 export OVPN_SERVER OVPN_ROUTES OVPN_DEFROUTE
 export OVPN_SERVER_URL OVPN_ENV OVPN_PROTO OVPN_CN OVPN_PORT
-export OVPN_CLIENT_TO_CLIENT OVPN_PUSH OVPN_NAT OVPN_DNS OVPN_MTU
+export OVPN_CLIENT_TO_CLIENT OVPN_PUSH OVPN_NAT OVPN_DNS OVPN_MTU OVPN_DEVICE
+export OVPN_TLS_CIPHER OVPN_CIPHER OVPN_AUTH
 
 # Preserve config
 if [ -f "$OVPN_ENV" ]; then
@@ -155,7 +177,6 @@ fi
 cat > "$conf" <<EOF
 server $(getroute $OVPN_SERVER)
 verb 3
-#duplicate-cn
 key $EASYRSA_PKI/private/${OVPN_CN}.key
 ca $EASYRSA_PKI/ca.crt
 cert $EASYRSA_PKI/issued/${OVPN_CN}.crt
@@ -169,15 +190,17 @@ persist-tun
 proto $OVPN_PROTO
 # Rely on Docker to do port mapping, internally always 1194
 port 1194
-dev tun0
+dev $OVPN_DEVICE$OVPN_DEVICEN
 status /tmp/openvpn-status.log
 
-client-config-dir $OPENVPN/ccd
-
 user nobody
 group nogroup
 EOF
 
+[ -n "$OVPN_TLS_CIPHER" ] && echo "tls-cipher $OVPN_TLS_CIPHER" >> "$conf"
+[ -n "$OVPN_CIPHER" ] && echo "cipher $OVPN_CIPHER" >> "$conf"
+[ -n "$OVPN_AUTH" ] && echo "auth $OVPN_AUTH" >> "$conf"
+
 [ -n "$OVPN_CLIENT_TO_CLIENT" ] && echo "client-to-client" >> "$conf"
 [ "$OVPN_DNS" == "1" ] && echo push "dhcp-option DNS 8.8.4.4" >> "$conf"
 [ "$OVPN_DNS" == "1" ] && echo push "dhcp-option DNS 8.8.8.8" >> "$conf"
@@ -193,7 +216,7 @@ for i in "${OVPN_PUSH[@]}"; do
     echo push \"$i\" >> "$conf"
 done
 
-set +e 
+set +e
 
 # Clean-up duplicate configs
 if diff -q "$bak_env" "$OVPN_ENV" 2>/dev/null; then

bin/ovpn_getclient

@@ -34,7 +34,7 @@ get_client_config() {
     echo "
 client
 nobind
-dev tun
+dev $OVPN_DEVICE
 remote-cert-tls server
 
 remote $OVPN_CN $OVPN_PORT $OVPN_PROTO
@@ -45,14 +45,11 @@ remote $OVPN_CN $OVPN_PORT $OVPN_PROTO
 $(cat $EASYRSA_PKI/private/${cn}.key)
 </key>
 <cert>
-$(cat $EASYRSA_PKI/issued/${cn}.crt)
+$(openssl x509 -in $EASYRSA_PKI/issued/${cn}.crt)
 </cert>
 <ca>
 $(cat $EASYRSA_PKI/ca.crt)
 </ca>
-<dh>
-$(cat $EASYRSA_PKI/dh.pem)
-</dh>
 <tls-auth>
 $(cat $EASYRSA_PKI/ta.key)
 </tls-auth>
@@ -63,8 +60,8 @@ key-direction 1
 key ${cn}.key
 ca ca.crt
 cert ${cn}.crt
-dh dh.pem
 tls-auth ta.key 1
+$OVPN_ADDITIONAL_CLIENT_CONFIG
 "
     fi
 
@@ -75,6 +72,18 @@ tls-auth ta.key 1
     if [ -n "$OVPN_MTU" ]; then
         echo "tun-mtu $OVPN_MTU"
     fi
+
+    if [ -n "$OVPN_TLS_CIPHER" ]; then
+        echo "tls-cipher $OVPN_TLS_CIPHER"
+    fi
+
+    if [ -n "$OVPN_CIPHER" ]; then
+        echo "cipher $OVPN_CIPHER"
+    fi
+
+    if [ -n "$OVPN_AUTH" ]; then
+        echo "auth $OVPN_AUTH"
+    fi
 }
 
 dir="$OPENVPN/clients/$cn"
@@ -85,7 +94,6 @@ case "$parm" in
         cp "$EASYRSA_PKI/private/${cn}.key" "$dir/${cn}.key"
         cp "$EASYRSA_PKI/ca.crt" "$dir/ca.crt"
         cp "$EASYRSA_PKI/issued/${cn}.crt" "$dir/${cn}.crt"
-        cp "$EASYRSA_PKI/dh.pem" "$dir/dh.pem"
         cp "$EASYRSA_PKI/ta.key" "$dir/ta.key"
         ;;
     "" | "combined")

bin/ovpn_getclient_all

@@ -1,5 +1,5 @@
 #!/bin/bash
-## @licence AGPLv3 <https://www.gnu.org/licenses/agpl-3.0.html>
+## @licence MIT <http://opensource.org/licenses/MIT>
 ## @author Copyright (C) 2015 Robin Schneider <ypid@riseup.net>
 
 if [ -z "$OPENVPN" ]; then

bin/ovpn_run

@@ -10,6 +10,9 @@ fi
 
 set -e
 
+# Build runtime arguments array based on environment
+ARGS=("--config" "$OPENVPN/openvpn.conf")
+
 source "$OPENVPN/ovpn_env.sh"
 
 mkdir -p /dev/net
@@ -17,22 +20,47 @@ if [ ! -c /dev/net/tun ]; then
     mknod /dev/net/tun c 10 200
 fi
 
-if [ ! -d "$OPENVPN/ccd" ]; then
-    mkdir -p /etc/openvpn/ccd
+if [ -d "$OPENVPN/ccd" ]; then
+    ARGS+=("--client-config-dir" "$OPENVPN/ccd")
 fi
 
+# When using --net=host, use this to specify nat device.
+[ -z "$OVPN_NATDEVICE" ] && OVPN_NATDEVICE=eth0
+
 # Setup NAT forwarding if requested
 if [ "$OVPN_DEFROUTE" != "0" ] || [ "$OVPN_NAT" == "1" ] ; then
-    iptables -t nat -C POSTROUTING -s $OVPN_SERVER -o eth0 -j MASQUERADE || {
-      iptables -t nat -A POSTROUTING -s $OVPN_SERVER -o eth0 -j MASQUERADE
+    iptables -t nat -C POSTROUTING -s $OVPN_SERVER -o $OVPN_NATDEVICE -j MASQUERADE || {
+      iptables -t nat -A POSTROUTING -s $OVPN_SERVER -o $OVPN_NATDEVICE -j MASQUERADE
     }
     for i in "${OVPN_ROUTES[@]}"; do
-        iptables -t nat -C POSTROUTING -s "$i" -o eth0 -j MASQUERADE || {
-          iptables -t nat -A POSTROUTING -s "$i" -o eth0 -j MASQUERADE
+        iptables -t nat -C POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE || {
+          iptables -t nat -A POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE
         }
     done
 fi
 
-conf="$OPENVPN/openvpn.conf"
+# Use a hacky hardlink as the CRL Needs to be readable by the user/group
+# OpenVPN is running as.  Only pass arguments to OpenVPN if it's found.
+if [ -r "$EASYRSA_PKI/crl.pem" ]; then
+    if [ ! -r "$OPENVPN/crl.pem" ]; then
+        ln "$EASYRSA_PKI/crl.pem" "$OPENVPN/crl.pem"
+        chmod 644 "$OPENVPN/crl.pem"
+    fi
+    ARGS+=("--crl-verify" "$OPENVPN/crl.pem")
+fi
 
-exec openvpn --config "$conf"
+ip -6 route show default 2>/dev/null
+if [ $? = 0 ]; then
+    echo "Enabling IPv6 Forwarding"
+    # If this fails, ensure the docker container is run with --privileged
+    # Could be side stepped with `ip netns` madness to drop privileged flag
+
+    sysctl net.ipv6.conf.default.forwarding=1 || echo "Failed to enable IPv6 Forwarding default"
+    sysctl net.ipv6.conf.all.forwarding=1 || echo "Failed to enable IPv6 Forwarding"
+fi
+
+if [ "$#" -gt 0 ]; then
+    exec openvpn "$@"
+else
+    exec openvpn ${ARGS[@]}
+fi

docs/backup.md

@@ -2,17 +2,19 @@
 
 ## Security
 
-The resulting archive from this back-up contains all credential to impersonate the server at a minimum.  If the client private keys are generated using the EasyRSA utility then it also contains the client certificates that could be used to impersonate said clients.  Most importantly, if the certificate authority key is in this archive (as it is given the quick start directions), then a adversary could generate certificates at will.
+The resulting archive from this backup contains all credential to impersonate the server at a minimum.  If the client's private keys are generated using the EasyRSA utility then it also contains the client certificates that could be used to impersonate said clients.  Most importantly, if the certificate authority key is in this archive (as it is given the quick start directions), then a adversary could generate certificates at will.
 
-I'd recommend encrypting the archive with something strong (e.g. gpg or openssl + AES).  For the paranoid keep backup offline.  For the truly paranoid users, never keep any keys (i.e. client and certificate authority) in the docker container to begin with :).
+I'd recommend encrypting the archive with something strong (e.g. gpg or openssl + AES).  For the paranoid keep backup offline.  For the [truly paranoid users](/docs/paranoid.md), never keep any keys (i.e. client and certificate authority) in the docker container to begin with :).
 
 
-TL;DR Protect the resulting archive file, by ensure there is very limited access to it.
+**TL;DR Protect the resulting archive file.  Ensure there is very limited access to it.**
 
 ## Backup to Archive
 
     docker run --volumes-from $OVPN_DATA --rm busybox tar -cvf - -C /etc openvpn | xz > openvpn-backup.tar.xz
 
-## Retore to New Image
+## Restore to New Container
+
+Assumes an existing container named `$OVPN_DATA` to extract the data over the top.
 
     xzcat openvpn-backup.tar.xz | docker run --name $OVPN_DATA -v /etc/openvpn -i busybox tar -xvf - -C /etc

docs/clients.md

@@ -1,6 +1,6 @@
-# Advanced client management
+# Advanced Client Management
 
-## Client configuration mode
+## Client Configuration Mode
 
 The [`ovpn_getclient`](/bin/ovpn_getclient) can produce two different versions of the configuration.
 
@@ -9,20 +9,28 @@ The [`ovpn_getclient`](/bin/ovpn_getclient) can produce two different versions o
 
 Note that some client software might be picky about which configuration format it accepts.
 
-## Batch mode
+## Batch Mode
 
 If you have more than a few clients, you will want to generate and update your client configuration in batch. For this task the script [`ovpn_getclient_all`](/bin/ovpn_getclient_all) was written, which writes out the configuration for each client to a separate directory called `clients/$cn`.
 
 Execute the following to generate the configuration for all clients:
 
-    docker run --rm -t -i -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn ovpn_getclient_all
+    docker run --rm -it --volumes-from $OVPN_DATA --volume /tmp/openvpn_clients:/etc/openvpn/clients kylemanna/openvpn ovpn_getclient_all
 
 After doing so, you will find the following files in each of the `$cn` directories:
 
     ca.crt
-    dh.pem
     $cn-combined.ovpn # Combined configuration file format. If your client recognices this file then only this file is needed.
     $cn.ovpn          # Separated configuration. This configuration file requires the other files ca.crt dh.pem $cn.crt $cn.key ta.key
     $cn.crt
     $cn.key
     ta.key
+
+## Revoking Client Certificates
+
+Revoke `client1`'s certificate and generate the certificate revocation list (CRL):
+
+    docker run --rm -it --volumes-from $OVPN_DATA kylemanna/openvpn easyrsa revoke client1
+    docker run --rm -it --volumes-from $OVPN_DATA kylemanna/openvpn easyrsa gen-crl
+
+The OpenVPN server will read this change every time a client connects (no need to restart server) and deny clients access using revoked certificates.

docs/docker.md

@@ -0,0 +1,52 @@
+# Install Latest Docker Service
+
+Docker included with some distributions lags far behind upstream.  This guide aims to provide a quick and reliable way to install or update it.
+
+It is recommended to use platforms that support systemd as future versions of this docker image may require systemd to help with some tasks:
+
+* Fedora
+* Debian 8.1+
+
+## Debian / Ubuntu
+
+### Step 1 — Set Up Docker
+
+Docker is moving fast and Debian / Ubuntu's long term support (LTS) policy doesn't keep up. To work around this we'll install a PPA that will get us the latest version of Docker. For Debian Jessie users, just install docker.io from jessie-backports.
+
+Ensure dependencies are installed:
+
+    sudo apt-get update && sudo apt-get install -y apt-transport-https curl
+
+Add the upstream Docker repository package signing key. The apt-key command uses elevated privileges via sudo, so a password prompt for the user's password may appear:
+
+    curl -L https://get.docker.com/gpg | sudo apt-key add -
+
+Add the upstream Docker repository to the system list:
+
+    echo deb https://get.docker.io/ubuntu docker main | sudo tee /etc/apt/sources.list.d/docker.list
+
+Update the package list and install the Docker package:
+
+    sudo apt-get update && sudo apt-get install -y lxc-docker
+
+Add your user to the `docker` group to enable communication with the Docker daemon as a normal user, where `$USER` is your username. Exit and log in again for the new group to take effect:
+
+    sudo usermod -aG docker $USER
+
+After **re-logging in** verify the group membership using the id command. The expected response should include docker like the following example:
+
+    uid=1001(test0) gid=1001(test0) groups=1001(test0),27(sudo),999(docker)
+
+### Step 2 — Test Docker
+
+Run a Debian jessie docker container:
+
+    docker run --rm -it debian:jessie bash -l
+
+Once inside the container you'll see the `root@<container id>:/#` prompt signifying that the current shell is in a Docker container. To confirm that it's different from the host, check the version of Debian running in the container:
+
+    cat /etc/issue.net
+
+Expected result:
+
+    Debian GNU/Linux 8

docs/faqs.md

@@ -1,5 +1,12 @@
 # Frequently Asked Questions
 
+## How do I edit `openvpn.conf`?
+
+Use a Docker image with a text editor pre-installed (i.e. Ubuntu) and connect the volume container:
+
+    docker run --volumes-from $OVPN_DATA --rm -it ubuntu vi /etc/openvpn/openvpn.conf
+
+
 ## Why not keep everything in one image?
 
 The run-time image (`kylemanna/openvpn`) is intended to be an ephemeral image. Nothing should be saved in it so that it can be re-downloaded and re-run when updates are pushed (i.e. newer version of OpenVPN or even Debian). The data container contains all this data and is attached at run time providing a safe home.

docs/ipv6.md

@@ -0,0 +1,94 @@
+# IPv6 Support
+
+This is a work in progress, more polish to follow.
+
+## Tunnel IPv6 Address To OpenVPN Clients
+
+This feature is advanced and recommended only for those who already have a functioning IPv4 tunnel and know how IPv6 works.
+
+Systemd is used to setup a static route and Debian 8.1 or later is recommended as the host distribution.  Others probably work, but haven't been tested.
+
+
+### Step 1 — Setup IPv6 on the Host Machine
+
+The tutorial uses a free tunnel from [tunnelbroker.net](https://tunnelbroker.net/) to get a /64 and /48 prefix allocated to me.  The tunnel endpoint is less then 3 ms away from Digital Ocean's San Francisco datacenter.
+
+Place the following in `/etc/network/interfaces`.  Replace `PUBLIC_IP` with your host's public IPv4 address and replace 2001:db8::2 and 2001:db8::1 with the corresponding tunnel endpoints:
+
+    auto he-ipv6
+    iface he-ipv6 inet6 v4tunnel
+        address 2001:db8::2
+        netmask 64
+        endpoint 72.52.104.74
+        local PUBLIC_IP
+        ttl 255
+        gateway 2001:db8::1
+
+Bring the interface up:
+
+    ifup he-ipv6
+
+Test that IPv6 works on the host:
+
+    ping6 google.com
+
+If this doesn't work, figure it out.  It may be necessary to add an firewall rule to allow IP protocol 41 through the firewall.
+
+
+### Step 2 — Update Docker's Init To Enable IPv6 Support
+
+Add the `--ipv6` to the Docker daemon invocation.
+
+On **Ubuntu** and old versions of Debian Append the `--ipv6` argument to the `DOCKER_OPTS` variable in:
+
+    /etc/default/docker
+
+On modern **systemd** distributions copy the service file and modify it and reload the service:
+
+    sed -e 's:^\(ExecStart.*\):\1 --ipv6:' /lib/systemd/system/docker.service | tee /etc/systemd/system/docker.service
+    systemctl restart docker.service
+
+
+### Step 3 — Setup the systemd Unit File
+
+Copy the systemd init file from the docker-openvpn /init directory of the repository and install into `/etc/systemd/system/docker-openvpn.service`
+
+    curl -o /etc/systemd/system/docker-openvpn@.service 'https://raw.githubusercontent.com/kylemanna/docker-openvpn/dev/init/docker-openvpn%40.service'
+
+Edit the file, replace `IP6_PREFIX` value with the value of your /64 prefix.
+
+    vi /etc/systemd/system/docker-openvpn@.service
+
+Finally, reload systemd so the changes take affect:
+
+    systemctl daemon-reload
+
+### Step 4 — Start OpenVPN
+
+Ensure that OpenVPN has been initialized and configured as described in the top level `README.md`.
+
+Start the systemd service file specifying the volume container suffix as the instance.  For example, `INSTANCE=test0` has a docker volume container named `ovpn-data-test0` and service will create `ovpn-test0` container:
+
+    systemctl start docker-openvpn@test0
+
+Verify logs if needed:
+
+    systemctl status docker-openvpn@test0
+    docker logs ovpn-test0
+
+### Step 4 — Modify Client Config for IPv6 Default Route
+
+Append the default route for the public Internet:
+
+    echo "route-ipv6 2000::/3" >> clientname.ovpn
+
+### Step 5 — Start up Client
+
+If all went according to plan, then `ping6 2600::` and `ping6 google.com` should work.
+
+Fire up a web browser and attempt to navigate to [https://ipv6.google.com](https://ipv6.google.com).
+
+
+## Connect to the OpenVPN Server Over IPv6
+
+Not implemented, yet.

docs/paranoid.md

@@ -1,11 +1,32 @@
 # Advanced security
 
+## Keep the CA root key save
 As mentioned in the [backup section](/docs/backup.md), there are good reasons to not generate the CA and/or leave it on the server. This document describes how you can generate the CA and all your certificates on a secure machine and then copy only the needed files (which never includes the CA root key obviously ;) ) to the server(s) and clients.
 
-Execute the following commands. Note that you might want to change the volume `/tmp/openvpn` to persistent storage or use a data docker container for this.
+Execute the following commands. Note that you might want to change the volume `$PWD` or use a data docker container for this.
 
-    docker run --rm -t -i -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn ovpn_genconfig -u udp://VPN.SERVERNAME.COM
-    docker run --rm -t -i -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn ovpn_initpki
-    docker run --rm -t -i -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn ovpn_copy_server_files
+    docker run --net=none --rm -t -i -v $PWD:/etc/openvpn kylemanna/openvpn ovpn_genconfig -u udp://VPN.SERVERNAME.COM
+    docker run --net=none --rm -t -i -v $PWD:/etc/openvpn kylemanna/openvpn ovpn_initpki
+    docker run --net=none --rm -t -i -v $PWD:/etc/openvpn kylemanna/openvpn ovpn_copy_server_files
 
 The [`ovpn_copy_server_files`](/bin/ovpn_copy_server_files) script puts all the needed configuration in a subdirectory which defaults to `$OPENVPN/server`. All you need to do now is to copy this directory to the server and you are good to go.
+
+## Crypto Hardening
+
+If you want to select the cyphers used by OpenVPN the following parameters of the `ovpn_genconfig` might interest you:
+
+    -T    Encrypt packets with the given cipher algorithm instead of the default one (tls-cipher).
+    -C    A list of allowable TLS ciphers delimited by a colon (cipher).
+    -a    Authenticate  packets with HMAC using the given message digest algorithm (auth).
+
+
+The following options have been tested successfully:
+
+    docker run --volumes-from $OVPN_DATA --net=none --rm kylemanna/openvpn ovpn_genconfig -C 'AES-256-CBC' -a 'SHA384'
+
+Changing the `tls-cipher` option seems to be more complicated because some clients (namely NetworkManager in Debian Jessie) seem to have trouble with this. Running `openvpn` manually also did not solve the issue:
+
+    TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
+    TLS Error: TLS handshake failed
+
+Have a look at the [Applied-Crypto-Hardening](https://github.com/BetterCrypto/Applied-Crypto-Hardening/tree/master/src/configuration/VPNs/OpenVPN) project for more examples.

docs/static-ips.md

@@ -1,6 +1,6 @@
 # Static IP Addresses
 
-The docker image is setup for static client configuration on the 192.168.254.0/24 subnet.  To use it follow the Quick Start section below.  Note that the IP addresses octects need to be picked special, see [OpenVPN Documentation](https://openvpn.net/index.php/open-source/documentation/howto.html#policy) for more details.
+The docker image is setup for static client configuration on the 192.168.254.0/24 subnet.  To use it follow the Quick Start section below.  Note that the IP addresses octets need to be picked special, see [OpenVPN Documentation](https://openvpn.net/index.php/open-source/documentation/howto.html#policy) for more details.
 
 ## Quick Start
 

init/docker-openvpn@.service

@@ -0,0 +1,44 @@
+[Unit]
+Description=OpenVPN Docker Container
+Documentation=https://github.com/kylemanna/docker-openvpn
+After=network.target docker.socket
+Requires=docker.socket
+
+[Service]
+RestartSec=10
+Restart=always
+
+# Modify IP6_PREFIX to match network config
+#Environment="IP6_PREFIX=2001:db8::/64"
+#Environment="ARGS=--config openvpn.conf --server-ipv6 2001:db8::/64"
+Environment="NAME=ovpn-%i"
+Environment="DATA_VOL=ovpn-data-%i"
+Environment="IMG=kylemanna/openvpn:latest"
+Environment="PORT=1194:1194/udp"
+
+# To override environment variables, use local configuration directory:
+# /etc/systemd/system/docker-openvpn@foo.d/local.conf
+# http://www.freedesktop.org/software/systemd/man/systemd.unit.html
+
+# Clean-up bad state if still hanging around
+ExecStartPre=-/usr/bin/docker rm -f $NAME
+
+# Attempt to pull new image for security updates
+ExecStartPre=-/usr/bin/docker pull $IMG
+
+# IPv6: Ensure forwarding is enabled on host's networking stack (hacky)
+# Would be nice to use systemd-network on the host, but this doens't work
+# http://lists.freedesktop.org/archives/systemd-devel/2015-June/032762.html
+ExecStartPre=/bin/sh -c 'test -z "$IP6_PREFIX" && exit 0; sysctl net.ipv6.conf.all.forwarding=1'
+
+# Main process
+ExecStart=/usr/bin/docker run --rm --privileged --volumes-from ${DATA_VOL}:ro --name ${NAME} -p ${PORT} ${IMG} ovpn_run $ARGS
+
+# IPv6: Add static route for IPv6 after it starts up
+ExecStartPost=/bin/sh -c 'test -z "${IP6_PREFIX}" && exit 0; sleep 1; ip route replace ${IP6_PREFIX} via $(docker inspect -f "{{ .NetworkSettings.GlobalIPv6Address }}" $NAME ) dev docker0'
+
+# IPv6: Clean-up
+ExecStopPost=/bin/sh -c 'test -z "$IP6_PREFIX" && exit 0; ip route del $IP6_PREFIX dev docker0'
+
+[Install]
+WantedBy=multi-user.target

tests/basic.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+set -ex
+OVPN_DATA=basic-data
+CLIENT=travis-client
+IMG=kylemanna/openvpn
+
+#
+# Create a docker container with the config data
+#
+docker run --name $OVPN_DATA -v /etc/openvpn busybox
+
+ip addr ls
+SERV_IP=$(ip -4 -o addr show scope global  | awk '{print $4}' | sed -e 's:/.*::' | head -n1)
+docker run --volumes-from $OVPN_DATA --rm $IMG ovpn_genconfig -u udp://$SERV_IP
+
+# nopass is insecure
+docker run --volumes-from $OVPN_DATA --rm -it -e "EASYRSA_BATCH=1" -e "EASYRSA_REQ_CN=Travis-CI Test CA" $IMG ovpn_initpki nopass
+
+docker run --volumes-from $OVPN_DATA --rm -it $IMG easyrsa build-client-full $CLIENT nopass
+
+docker run --volumes-from $OVPN_DATA --rm $IMG ovpn_getclient $CLIENT | tee client/config.ovpn
+
+#
+# Fire up the server
+#
+sudo iptables -N DOCKER
+sudo iptables -I FORWARD -j DOCKER
+# run in shell bg to get logs
+docker run --name "ovpn-test" --volumes-from $OVPN_DATA --rm -p 1194:1194/udp --privileged $IMG &
+
+#for i in $(seq 10); do
+#    SERV_IP=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}')
+#    test -n "$SERV_IP" && break
+#done
+#sed -ie s:SERV_IP:$SERV_IP:g client/config.ovpn
+
+#
+# Fire up a client in a container since openvpn is disallowed by Travis-CI, don't NAT
+# the host as it confuses itself:
+# "Incoming packet rejected from [AF_INET]172.17.42.1:1194[2], expected peer address: [AF_INET]10.240.118.86:1194"
+#
+docker run --rm --net=host --privileged --volume $PWD/client:/client $IMG /client/wait-for-connect.sh
+
+#
+# Client either connected or timed out, kill server
+#
+kill %1
+
+#
+# Celebrate
+#
+cat <<EOF
+ ___________
+< it worked >
+ -----------
+        \   ^__^
+         \  (oo)\_______
+            (__)\       )\/\\
+                ||----w |
+                ||     ||
+EOF

tests/client/wait-for-connect.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+set -ex
+OPENVPN_CONFIG=${1:-/client/config.ovpn}
+
+# Run in background, rely on bash for job management
+openvpn --config "$OPENVPN_CONFIG" --management 127.0.0.1 9999 &
+
+# Spin waiting for interface to exist signifying connection
+timeout=10
+for i in $(seq $timeout); do
+
+    # Break when connected
+    #echo state | busybox nc 127.0.0.1 9999 | grep -q "CONNECTED,SUCCESS" && break;
+
+    # Bash magic for tcp sockets
+    if exec 3<>/dev/tcp/127.0.0.1/9999; then
+        # Consume all header input
+        while read -t 0.1 <&3; do true; done
+        echo "state" >&3
+        read -t 1 <&3
+        echo -n $REPLY | grep -q "CONNECTED,SUCCESS" && break || true
+        exec 3>&-
+    fi
+
+    # Else sleep
+    sleep 1
+done
+
+if [ $i -ge $timeout ]; then
+    echo "Error starting OpenVPN, i=$i, exiting."
+    exit 2;
+fi
+
+# The show is over.
+kill %1

tests/paranoid.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -ex
+
+IMG=${IMG:-kylemanna/openvpn}
+
+temp=$(mktemp -d)
+
+pushd $temp
+
+SERV_IP=$(ip -4 -o addr show scope global  | awk '{print $4}' | sed -e 's:/.*::' | head -n1)
+
+docker run --net=none --rm -t -i -v $PWD:/etc/openvpn $IMG ovpn_genconfig -u udp://$SERV_IP
+
+docker run --net=none --rm -t -i -v $PWD:/etc/openvpn -e "EASYRSA_BATCH=1" -e "EASYRSA_REQ_CN=Travis-CI Test CA" kylemanna/openvpn ovpn_initpki nopass
+
+docker run --net=none --rm -t -i -v $PWD:/etc/openvpn $IMG ovpn_copy_server_files
+
+popd
+# Can't delete the temp directory as docker creates some files as root.
+# Just let it die with the test instance.
+rm -rf $temp || true