286 lines
8.3 KiB
Bash
286 lines
8.3 KiB
Bash
#!/bin/bash
|
|
|
|
# defaults
|
|
ADMINPASSWORD="secret"
|
|
DNS1="8.8.8.8"
|
|
DNS2="8.8.4.4"
|
|
PROTOCOL=udp
|
|
PORT=1194
|
|
HOST=$(wget -4qO- "http://whatismyip.akamai.com/")
|
|
|
|
|
|
for i in "$@"
|
|
do
|
|
case $i in
|
|
--adminpassword=*)
|
|
ADMINPASSWORD="${i#*=}"
|
|
;;
|
|
--dns1=*)
|
|
DNS1="${i#*=}"
|
|
;;
|
|
--dns2=*)
|
|
DNS2="${i#*=}"
|
|
;;
|
|
--vpnport=*)
|
|
PORT="${i#*=}"
|
|
;;
|
|
--protocol=*)
|
|
PROTOCOL="${i#*=}"
|
|
;;
|
|
--host=*)
|
|
HOST="${i#*=}"
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
done
|
|
|
|
[ "${ADMINPASSWORD}" == "secret" ] && echo "fatal: password is not set" && exit 1
|
|
|
|
# Detect Debian users running the script with "sh" instead of bash
|
|
if readlink /proc/$$/exe | grep -qs "dash"; then
|
|
echo "This script needs to be run with bash, not sh"
|
|
exit 1
|
|
fi
|
|
|
|
if [[ "$EUID" -ne 0 ]]; then
|
|
echo "Sorry, you need to run this as root"
|
|
exit 2
|
|
fi
|
|
|
|
if [[ ! -e /dev/net/tun ]]; then
|
|
echo "The TUN device is not available. You need to enable TUN before running this script."
|
|
exit 3
|
|
fi
|
|
|
|
if grep -qs "CentOS release 5" "/etc/redhat-release"; then
|
|
echo "CentOS 5 is too old and not supported"
|
|
exit 4
|
|
fi
|
|
|
|
if [[ -e /etc/debian_version ]]; then
|
|
OS=debian
|
|
GROUPNAME=nogroup
|
|
RCLOCAL='/etc/rc.local'
|
|
elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
|
|
OS=centos
|
|
GROUPNAME=nobody
|
|
RCLOCAL='/etc/rc.d/rc.local'
|
|
else
|
|
echo "Looks like you aren't running this installer on Debian, Ubuntu or CentOS"
|
|
exit 5
|
|
fi
|
|
|
|
# Try to get our IP from the system and fallback to the Internet.
|
|
|
|
IP=$(ip addr | grep 'inet' | grep -v inet6 | grep -vE '127\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | grep -o -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | head -1)
|
|
if [[ "$IP" = "" ]]; then
|
|
IP=$(wget -4qO- "http://whatismyip.akamai.com/")
|
|
fi
|
|
|
|
|
|
|
|
if [[ "$OS" = 'debian' ]]; then
|
|
apt-get update
|
|
apt-get install openvpn iptables openssl ca-certificates lighttpd -y
|
|
else
|
|
# Else, the distro is CentOS
|
|
yum install epel-release -y
|
|
yum install openvpn iptables openssl wget ca-certificates lighttpd -y
|
|
fi
|
|
|
|
# An old version of easy-rsa was available by default in some openvpn packages
|
|
if [[ -d /etc/openvpn/easy-rsa/ ]]; then
|
|
rm -rf /etc/openvpn/easy-rsa/
|
|
fi
|
|
# Get easy-rsa
|
|
|
|
wget -O ~/EasyRSA-3.0.1.tgz "https://github.com/OpenVPN/easy-rsa/releases/download/3.0.1/EasyRSA-3.0.1.tgz"
|
|
tar xzf ~/EasyRSA-3.0.1.tgz -C ~/
|
|
mv ~/EasyRSA-3.0.1/ /etc/openvpn/
|
|
mv /etc/openvpn/EasyRSA-3.0.1/ /etc/openvpn/easy-rsa/
|
|
chown -R root:root /etc/openvpn/easy-rsa/
|
|
rm -rf ~/EasyRSA-3.0.1.tgz
|
|
cd /etc/openvpn/easy-rsa/
|
|
|
|
# Create the PKI, set up the CA, the DH params and the server + client certificates
|
|
./easyrsa init-pki
|
|
./easyrsa --batch build-ca nopass
|
|
./easyrsa gen-dh
|
|
./easyrsa build-server-full server nopass
|
|
|
|
# ./easyrsa build-client-full $CLIENT nopass
|
|
./easyrsa gen-crl
|
|
|
|
# Move the stuff we need
|
|
cp pki/ca.crt pki/private/ca.key pki/dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
|
|
|
|
# CRL is read with each client connection, when OpenVPN is dropped to nobody
|
|
chown nobody:$GROUPNAME /etc/openvpn/crl.pem
|
|
|
|
# Generate key for tls-auth
|
|
openvpn --genkey --secret /etc/openvpn/ta.key
|
|
|
|
# Generate server.conf
|
|
echo "port $PORT
|
|
proto $PROTOCOL
|
|
dev tun
|
|
sndbuf 0
|
|
rcvbuf 0
|
|
ca ca.crt
|
|
cert server.crt
|
|
key server.key
|
|
dh dh.pem
|
|
tls-auth ta.key 0
|
|
topology subnet
|
|
server 10.8.0.0 255.255.255.0
|
|
ifconfig-pool-persist ipp.txt" > /etc/openvpn/server.conf
|
|
echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server.conf
|
|
|
|
# DNS
|
|
echo "push \"dhcp-option DNS $DNS1\"" >> /etc/openvpn/server.conf
|
|
echo "push \"dhcp-option DNS $DNS2\"" >> /etc/openvpn/server.conf
|
|
echo "keepalive 10 120
|
|
cipher AES-256-CBC
|
|
comp-lzo
|
|
user nobody
|
|
group $GROUPNAME
|
|
persist-key
|
|
persist-tun
|
|
status openvpn-status.log
|
|
verb 3
|
|
crl-verify crl.pem" >> /etc/openvpn/server.conf
|
|
|
|
# Enable net.ipv4.ip_forward for the system
|
|
sed -i '/\<net.ipv4.ip_forward\>/c\net.ipv4.ip_forward=1' /etc/sysctl.conf
|
|
if ! grep -q "\<net.ipv4.ip_forward\>" /etc/sysctl.conf; then
|
|
echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf
|
|
fi
|
|
|
|
# Avoid an unneeded reboot
|
|
echo 1 > /proc/sys/net/ipv4/ip_forward
|
|
if pgrep firewalld; then
|
|
# Using both permanent and not permanent rules to avoid a firewalld
|
|
# reload.
|
|
# We don't use --add-service=openvpn because that would only work with
|
|
# the default port and protocol.
|
|
firewall-cmd --zone=public --add-port=$PORT/$PROTOCOL
|
|
firewall-cmd --zone=trusted --add-source=10.8.0.0/24
|
|
firewall-cmd --permanent --zone=public --add-port=$PORT/$PROTOCOL
|
|
firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
|
|
# Set NAT for the VPN subnet
|
|
firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 -j SNAT --to $IP
|
|
firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 -j SNAT --to $IP
|
|
else
|
|
# Needed to use rc.local with some systemd distros
|
|
if [[ "$OS" = 'debian' && ! -e $RCLOCAL ]]; then
|
|
echo '#!/bin/sh -e
|
|
exit 0' > $RCLOCAL
|
|
fi
|
|
chmod +x $RCLOCAL
|
|
# Set NAT for the VPN subnet
|
|
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to $IP
|
|
sed -i "1 a\iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -j SNAT --to $IP" $RCLOCAL
|
|
if iptables -L -n | grep -qE '^(REJECT|DROP)'; then
|
|
# If iptables has at least one REJECT rule, we asume this is needed.
|
|
# Not the best approach but I can't think of other and this shouldn't
|
|
# cause problems.
|
|
iptables -I INPUT -p $PROTOCOL --dport $PORT -j ACCEPT
|
|
iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
|
|
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
|
sed -i "1 a\iptables -I INPUT -p $PROTOCOL --dport $PORT -j ACCEPT" $RCLOCAL
|
|
sed -i "1 a\iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT" $RCLOCAL
|
|
sed -i "1 a\iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" $RCLOCAL
|
|
fi
|
|
fi
|
|
# If SELinux is enabled and a custom port or TCP was selected, we need this
|
|
if hash sestatus 2>/dev/null; then
|
|
if sestatus | grep "Current mode" | grep -qs "enforcing"; then
|
|
if [[ "$PORT" != '1194' || "$PROTOCOL" = 'tcp' ]]; then
|
|
# semanage isn't available in CentOS 6 by default
|
|
if ! hash semanage 2>/dev/null; then
|
|
yum install policycoreutils-python -y
|
|
fi
|
|
semanage port -a -t openvpn_port_t -p $PROTOCOL $PORT
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
# And finally, restart OpenVPN
|
|
if [[ "$OS" = 'debian' ]]; then
|
|
# Little hack to check for systemd
|
|
if pgrep systemd-journal; then
|
|
systemctl restart openvpn@server.service
|
|
else
|
|
/etc/init.d/openvpn restart
|
|
fi
|
|
else
|
|
if pgrep systemd-journal; then
|
|
systemctl restart openvpn@server.service
|
|
systemctl enable openvpn@server.service
|
|
else
|
|
service openvpn restart
|
|
chkconfig openvpn on
|
|
fi
|
|
fi
|
|
|
|
# Try to detect a NATed connection and ask about it to potential LowEndSpirit users
|
|
|
|
|
|
# client-common.txt is created so we have a template to add further users later
|
|
echo "client
|
|
dev tun
|
|
proto $PROTOCOL
|
|
sndbuf 0
|
|
rcvbuf 0
|
|
remote $HOST $PORT
|
|
resolv-retry infinite
|
|
nobind
|
|
persist-key
|
|
persist-tun
|
|
remote-cert-tls server
|
|
cipher AES-256-CBC
|
|
comp-lzo
|
|
setenv opt block-outside-dns
|
|
key-direction 1
|
|
verb 3" > /etc/openvpn/client-common.txt
|
|
|
|
# Generates the custom client.ovpn
|
|
mv /etc/openvpn/clients/ /etc/openvpn/clients.$$/
|
|
mkdir /etc/openvpn/clients/
|
|
|
|
#Setup the web server to use an self signed cert
|
|
# mkdir /etc/openvpn/clients/
|
|
|
|
#Set permissions for easy-rsa and open vpn to be modified by the web user.
|
|
chown -R www-data:www-data /etc/openvpn/easy-rsa
|
|
chown -R www-data:www-data /etc/openvpn/clients/
|
|
chmod -R 755 /etc/openvpn/
|
|
chmod -R 777 /etc/openvpn/crl.pem
|
|
chmod g+s /etc/openvpn/clients/
|
|
chmod g+s /etc/openvpn/easy-rsa/
|
|
|
|
#Generate a self-signed certificate for the web server
|
|
mv /etc/lighttpd/ssl/ /etc/lighttpd/ssl.$$/
|
|
mkdir /etc/lighttpd/ssl/
|
|
openssl req -new -x509 -keyout /etc/lighttpd/ssl/server.pem -out /etc/lighttpd/ssl/server.pem -days 9999 -nodes -subj "/C=US/ST=California/L=San Francisco/O=zingbox.com/OU=Ops Department/CN=zingbox.com"
|
|
chmod 744 /etc/lighttpd/ssl/server.pem
|
|
|
|
|
|
#Configure the web server with the lighttpd.conf from GitHub
|
|
mv /etc/lighttpd/lighttpd.conf /etc/lighttpd/lighttpd.conf.$$
|
|
wget -O /etc/lighttpd/lighttpd.conf https://raw.githubusercontent.com/kenneyhe-zingbox/simple-openvpn-server/master/lighttpd.conf
|
|
|
|
#install the webserver scripts
|
|
rm /var/www/html/*
|
|
wget -O /var/www/html/index.sh https://raw.githubusercontent.com/kenneyhe-zingbox/simple-openvpn-server/master/index.sh
|
|
|
|
wget -O /var/www/html/download.sh https://raw.githubusercontent.com/kenneyhe-zingbox/simple-openvpn-server/master/download.sh
|
|
chown -R www-data:www-data /var/www/html/
|
|
|
|
#set the password file for the WWW logon
|
|
echo "admin:$ADMINPASSWORD" >> /etc/lighttpd/.lighttpdpassword
|
|
|
|
#restart the web server
|
|
service lighttpd restart
|