AWS 搭建 VPN 服务(PPTP & L2TP) 整理

只为记录和整理在AWS上假设VPN服务器帮助过我的资料，
环境使用AWS EC2 东京区域， OS为ubuntu， PPTP和L2TP各自建立一个， 从speed test上看， 下载有2mbps左右，上传则作为1mbps左右。

ps:

原本aws 免费的vm到期， 就在双11的时候购买了阿里云新加坡的vm，结果发现这是一个失败的决定，钱是小事，主要是时间被浪费了很多， 切换回aws，一切都很顺利。

1， AWS 上架设 PPTP；

这个比较简单， 主要参考有：

http://blog.banban.me/blog/2014/06/09/li-yong-awsmian-fei-zhang-hu-da-jian-vpn/

http://tang.pleasev.com/2012/11/09/599/

http://www.myvoipapp.com/blogs/yxh/2011/02/24/amazon-ec2ubuntu%E7%B3%BB%E7%BB%9F%E4%B8%8B%E6%90%AD%E5%BB%BAvpn%E7%8E%AF%E5%A2%83/

2，AWS 上架设 L2TP；

IPsec/L2TP VPN Auto Setup for Ubuntu with Libreswan， 一键式安装， 注意要点有：

a， 需要修改脚本中的psk key， user name， password 三个值；

b，脚本随luanch ec2 instance时，附在user data中，这样instance 创建成功后，会自动执行该脚本；

c，Security group 需要增加如下几项；

SSH	TCP	22	0.0.0.0/0
Custom TCP Rule	TCP	500	0.0.0.0/0
Custom UDP Rule	UDP	4500	0.0.0.0/0
Custom UDP Rule	UDP	500	0.0.0.0/0

主要具体参考：

https://gist.github.com/hwdsl2/9030462#file-vpnsetup-sh

http://blog.ls20.com/ipsec-l2tp-vpn-auto-setup-for-ubuntu-12-04-on-amazon-ec2/

http://www.sarfata.org/posts/setting-up-an-amazon-vpn-server.md/

只为记录和整理在AWS上假设VPN服务器帮助过我的资料，
环境使用AWS EC2 东京区域， OS为ubuntu， PPTP和L2TP各自建立一个， 从speed test上看， 下载有2mbps左右，上传则作为1mbps左右。

ps:
原本aws 免费的vm到期， 就在双11的时候购买了阿里云新加坡的vm，结果发现这是一个失败的决定，钱是小事，主要是时间被浪费了很多， 切换回aws，一切都很顺利。

1， AWS 上架设 PPTP；
这个比较简单， 主要参考有：
http://blog.banban.me/blog/2014/06/09/li-yong-awsmian-fei-zhang-hu-da-jian-vpn/
http://tang.pleasev.com/2012/11/09/599/
http://www.myvoipapp.com/blogs/yxh/2011/02/24/amazon-ec2ubuntu%E7%B3%BB%E7%BB%9F%E4%B8%8B%E6%90%AD%E5%BB%BAvpn%E7%8E%AF%E5%A2%83/

2，AWS 上架设 L2TP；
IPsec/L2TP VPN Auto Setup for Ubuntu with Libreswan， 一键式安装， 注意要点有：
a， 需要修改脚本中的psk key， user name， password 三个值；
b，脚本随luanch ec2 instance时，附在user data中，这样instance 创建成功后，会自动执行该脚本；
c，Security group 需要增加如下几项；
SSH	TCP	22	0.0.0.0/0
Custom TCP Rule	TCP	500	0.0.0.0/0
Custom UDP Rule	UDP	4500	0.0.0.0/0
Custom UDP Rule	UDP	500	0.0.0.0/0
主要具体参考：
https://gist.github.com/hwdsl2/9030462#file-vpnsetup-sh
http://blog.ls20.com/ipsec-l2tp-vpn-auto-setup-for-ubuntu-12-04-on-amazon-ec2/
http://www.sarfata.org/posts/setting-up-an-amazon-vpn-server.md/

[plain] view plain copy print?
#!/bin/sh
#
# Amazon EC2 user-data file for automatic configuration of IPsec/L2TP VPN server
# on a Ubuntu or Debian instance. Tested with Ubuntu 14.04 & 12.04 and Debian 8.
# With minor modifications, this script *can also be used* on dedicated servers
# or any KVM- or XEN-based Virtual Private Server (VPS) from other providers.
#
# DO NOT RUN THIS SCRIPT ON YOUR PC OR MAC! THIS IS MEANT TO BE RUN WHEN
# YOUR AMAZON EC2 INSTANCE STARTS!
#
# Copyright (C) 2014 Lin Song
# Based on the work of Thomas Sarlandie (Copyright 2012)
#
# This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
# Unported License: http://creativecommons.org/licenses/by-sa/3.0/
#
# Attribution required: please include my name in any derivative and let me
# know how you have improved it!   

if [ "$(uname)" = "Darwin" ]; then
  echo 'DO NOT run this script on your Mac! It should only be run on a newly-created EC2 instance'
  echo 'or other Dedicated Server / VPS, after you have modified it to set the variables below.'
  exit
fi  

if [ "$(lsb_release -si)" != "Ubuntu" ] && [ "$(lsb_release -si)" != "Debian" ]; then
  echo "Looks like you aren't running this script on a Ubuntu or Debian system."
  exit
fi  

if [ "$(id -u)" != 0 ]; then
  echo "Sorry, you need to run this script as root."
  exit
fi  

# Please define your own values for those variables
IPSEC_PSK=xx_psk
VPN_USER=xx
VPN_PASSWORD=xx  

# If you need multiple VPN users with different credentials,
# please see: https://gist.github.com/hwdsl2/123b886f29f4c689f531  

# Important Notes:
# For Windows users, a registry change is required to allow connections
# to a VPN server behind NAT. Refer to section "Error 809" on this page:
# https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN  

# iPhone/iOS users may need to replace this line in ipsec.conf:
# "rightprotoport=17/%any" with "rightprotoport=17/0".  

# If using Amazon EC2, these ports must be open in the security group of
# your VPN server: UDP ports 500 & 4500, and TCP port 22 (optional, for SSH).  

# Update package index and install wget, dig (dnsutils) and nano
apt-get -y update
apt-get -y install wget dnsutils nano  

echo 'If the script hangs here, press Ctrl-C to interrupt, then edit it and comment out'
echo 'the next two lines PUBLIC_IP= and PRIVATE_IP=, OR replace them with the actual IPs.'  

# In Amazon EC2, these two variables will be found automatically.
# For all other servers, you may replace them with the actual IPs,
# or comment out and let the script auto-detect in the next section.
# If your server only has a public IP, use that IP on both lines.
PUBLIC_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/public-ipv4')
PRIVATE_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/local-ipv4')  

# Attempt to find server IPs automatically for non-EC2 servers
[ "$PUBLIC_IP" = "" ] && PUBLIC_IP=$(dig +short myip.opendns.com @resolver1.opendns.com)
[ "$PUBLIC_IP" = "" ] && PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipecho.net/plain)
[ "$PUBLIC_IP" = "" ] && { echo "Could not find Public IP, please edit the VPN script manually."; exit; }
[ "$PRIVATE_IP" = "" ] && PRIVATE_IP=$(ifconfig eth0 | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*')
[ "$PRIVATE_IP" = "" ] && { echo "Could not find Private IP, please edit the VPN script manually."; exit; }  

# Install necessary packages
apt-get -y install libnss3-dev libnspr4-dev pkg-config libpam0g-dev \
        libcap-ng-dev libcap-ng-utils libselinux1-dev \
        libcurl4-nss-dev libgmp3-dev flex bison gcc make \
        libunbound-dev libnss3-tools libevent-dev
apt-get -y --no-install-recommends install xmlto
apt-get -y install xl2tpd  

# Create and change to working dir
mkdir -p /opt/src
cd /opt/src  

# Compile and install Libreswan (https://libreswan.org/)
# To upgrade Libreswan when a newer version is available, just re-run
# these commands with the new "SWAN_VER", and then restart services with
# "service ipsec restart" and "service xl2tpd restart".
SWAN_VER=3.15
SWAN_URL=https://download.libreswan.org/libreswan-${SWAN_VER}.tar.gz
wget -t 3 -T 30 -qO- $SWAN_URL | tar xvz
[ ! -d libreswan-${SWAN_VER} ] && { echo "Could not retrieve the Libreswan source file. Aborting."; exit; }
cd libreswan-${SWAN_VER}
make programs && make install  

# Prepare various config files
cat > /etc/ipsec.conf <<EOF
version 2.0  

config setup
  dumpdir=/var/run/pluto/
  nat_traversal=yes
  virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!192.168.42.0/24
  oe=off
  protostack=netkey
  nhelpers=0
  interfaces=%defaultroute  

conn vpnpsk
  connaddrfamily=ipv4
  auto=add
  left=$PRIVATE_IP
  leftid=$PUBLIC_IP
  leftsubnet=$PRIVATE_IP/32
  leftnexthop=%defaultroute
  leftprotoport=17/1701
  rightprotoport=17/%any
  right=%any
  rightsubnetwithin=0.0.0.0/0
  forceencaps=yes
  authby=secret
  pfs=no
  type=transport
  auth=esp
  ike=3des-sha1,aes-sha1
  phase2alg=3des-sha1,aes-sha1
  rekey=no
  keyingtries=5
  dpddelay=30
  dpdtimeout=120
  dpdaction=clear
EOF  

cat > /etc/ipsec.secrets <<EOF
$PUBLIC_IP  %any  : PSK "$IPSEC_PSK"
EOF  

cat > /etc/xl2tpd/xl2tpd.conf <<EOF
[global]
port = 1701  

;debug avp = yes
;debug network = yes
;debug state = yes
;debug tunnel = yes  

[lns default]
ip range = 192.168.42.10-192.168.42.250
local ip = 192.168.42.1
require chap = yes
refuse pap = yes
require authentication = yes
name = l2tpd
;ppp debug = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes
EOF  

cat > /etc/ppp/options.xl2tpd <<EOF
ipcp-accept-local
ipcp-accept-remote
ms-dns 8.8.8.8
ms-dns 8.8.4.4
noccp
auth
crtscts
idle 1800
mtu 1280
mru 1280
lock
lcp-echo-failure 10
lcp-echo-interval 60
connect-delay 5000
EOF  

cat > /etc/ppp/chap-secrets <<EOF
# Secrets for authentication using CHAP
# client  server  secret  IP addresses  

$VPN_USER  l2tpd  $VPN_PASSWORD  *
EOF  

/bin/cp -f /etc/sysctl.conf /etc/sysctl.conf.old-$(date +%Y-%m-%d-%H:%M:%S) 2>/dev/null
cat > /etc/sysctl.conf <<EOF
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
net.ipv4.ip_forward = 1
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.all.log_martians = 1
net.ipv4.conf.default.log_martians = 1
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.rp_filter = 0
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
kernel.randomize_va_space = 1
net.core.wmem_max=12582912
net.core.rmem_max=12582912
net.ipv4.tcp_rmem= 10240 87380 12582912
net.ipv4.tcp_wmem= 10240 87380 12582912
EOF  

/bin/cp -f /etc/iptables.rules /etc/iptables.rules.old-$(date +%Y-%m-%d-%H:%M:%S) 2>/dev/null
cat > /etc/iptables.rules <<EOF
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:ICMPALL - [0:0]
-A INPUT -m conntrack --ctstate INVALID -j DROP
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p icmp --icmp-type 255 -j ICMPALL
-A INPUT -p udp --dport 67:68 --sport 67:68 -j ACCEPT
-A INPUT -p tcp --dport 22 -j ACCEPT
-A INPUT -p udp -m multiport --dports 500,4500 -j ACCEPT
-A INPUT -p udp --dport 1701 -m policy --dir in --pol ipsec -j ACCEPT
-A INPUT -p udp --dport 1701 -j DROP
-A INPUT -j DROP
-A FORWARD -m conntrack --ctstate INVALID -j DROP
-A FORWARD -i eth+ -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i ppp+ -o eth+ -j ACCEPT
# If you wish to allow traffic between VPN clients themselves, uncomment this line:
# -A FORWARD -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j ACCEPT
-A FORWARD -j DROP
-A ICMPALL -p icmp -f -j DROP
-A ICMPALL -p icmp --icmp-type 0 -j ACCEPT
-A ICMPALL -p icmp --icmp-type 3 -j ACCEPT
-A ICMPALL -p icmp --icmp-type 4 -j ACCEPT
-A ICMPALL -p icmp --icmp-type 8 -j ACCEPT
-A ICMPALL -p icmp --icmp-type 11 -j ACCEPT
-A ICMPALL -p icmp -j DROP
COMMIT
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -s 192.168.42.0/24 -o eth+ -j SNAT --to-source ${PRIVATE_IP}
COMMIT
EOF  

cat > /etc/network/if-pre-up.d/iptablesload <<EOF
#!/bin/sh
/sbin/iptables-restore < /etc/iptables.rules
exit 0
EOF  

/bin/cp -f /etc/rc.local /etc/rc.local.old-$(date +%Y-%m-%d-%H:%M:%S) 2>/dev/null
cat > /etc/rc.local <<EOF
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
/usr/sbin/service ipsec restart
/usr/sbin/service xl2tpd restart
echo 1 > /proc/sys/net/ipv4/ip_forward
exit 0
EOF  

if [ ! -f /etc/ipsec.d/cert8.db ] ; then
   echo > /var/tmp/libreswan-nss-pwd
   /usr/bin/certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d
   /bin/rm -f /var/tmp/libreswan-nss-pwd
fi  

/sbin/sysctl -p
/bin/chmod +x /etc/network/if-pre-up.d/iptablesload
/bin/chmod 600 /etc/ipsec.secrets /etc/ppp/chap-secrets
/sbin/iptables-restore < /etc/iptables.rules  

/usr/sbin/service ipsec restart
/usr/sbin/service xl2tpd restart