function for all .

This commit is contained in:
xiagw 2018-01-05 15:15:01 +08:00
parent f50c33722c
commit f103339165

View File

@ -30,58 +30,21 @@ file_client_tpl="${dir_openvpn}/client-template.txt"
file_openvpn_conf="${dir_openvpn}/server.conf"
file_iptables='/etc/iptables/iptables.rules'
## function determine the operating system version
detect_os_ver(){
if [[ -e /etc/debian_version ]]; then
OS="debian"
# Getting the version number, to verify that a recent version of OpenVPN is available
VERSION_ID=$(cat /etc/os-release | grep "VERSION_ID")
SYSCTL='/etc/sysctl.conf'
if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="12.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.10"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.04"' ]]; then
echo 'Your version of Debian/Ubuntu is not supported.'
echo "I can't install a recent version of OpenVPN on your system."
echo ''
echo "However, if you're using Debian unstable/testing, or Ubuntu beta,"
echo 'then you can continue, a recent version of OpenVPN is available on these.'
echo 'Keep in mind they are not supported, though.'
while [[ "$CONTINUE" != [yn] ]]; do
read -p 'Continue ? [y/n]: ' -e CONTINUE
done
if [[ 'n' = "$CONTINUE" ]]; then
echo 'Ok, bye !'
exit 4
fi
fi
elif [[ -e /etc/centos-release || -e /etc/redhat-release && ! -e /etc/fedora-release ]]; then
OS='centos'
SYSCTL='/etc/sysctl.conf'
elif [[ -e /etc/arch-release ]]; then
OS='arch'
SYSCTL='/etc/sysctl.d/openvpn.conf'
elif [[ -e /etc/fedora-release ]]; then
OS='fedora'
SYSCTL='/etc/sysctl.d/openvpn.conf'
else
echo "Looks like you aren't running this installer on a Debian, Ubuntu, CentOS or ArchLinux system"
exit 4
fi
}
install_easyrsa(){
# An old version of easy-rsa was available by default in some openvpn packages
if [[ -d ${dir_easy}/ ]]; then
# An old version of easy-rsa was available by default in some openvpn packages
if [[ -d ${dir_easy}/ ]]; then
rm -rf ${dir_easy}/
fi
# Get easy-rsa
url_easy='https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.3/EasyRSA-3.0.3.tgz'
file_easy=${url_easy##*/}
wget -O ~/${file_easy} ${url_easy}
tar xzf ~/${file_easy} -C ~/
mv ~/${file_easy%.tgz} ${dir_easy}
chown -R root:root ${dir_easy}/
rm -rf ~/${file_easy}
fi
# Get easy-rsa
url_easy='https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.3/EasyRSA-3.0.3.tgz'
file_easy=${url_easy##*/}
wget -O ~/${file_easy} ${url_easy}
tar xzf ~/${file_easy} -C ~/
mv ~/${file_easy%.tgz} ${dir_easy}
chown -R root:root ${dir_easy}/
rm -rf ~/${file_easy}
}
set_firewall(){
@ -134,37 +97,39 @@ set_firewall(){
fi
}
newclient () {
# Where to write the custom client.ovpn?
if [ -e /home/$1 ]; then # if $1 is a user name
generate_newclient() {
# Where to write the custom client.ovpn?
if [ -e /home/$1 ]; then # if $1 is a user name
homeDir="/home/$1"
elif [ ${SUDO_USER} ]; then # if not, use SUDO_USER
elif [ ${SUDO_USER} ]; then # if not, use SUDO_USER
homeDir="/home/${SUDO_USER}"
else # if not SUDO_USER, use /root
else # if not SUDO_USER, use /root
homeDir="${dir_openvpn}"
fi
# Generates the custom client.ovpn
file_client="$homeDir/$1.ovpn"
cp ${file_client_tpl} ${file_client}
echo "<ca>" >> ${file_client}
cat ${dir_easy}/pki/ca.crt >> ${file_client}
echo "</ca>" >> ${file_client}
echo "<cert>" >> ${file_client}
cat ${dir_easy}/pki/issued/$1.crt >> ${file_client}
echo "</cert>" >> ${file_client}
echo "<key>" >> ${file_client}
cat ${dir_easy}/pki/private/$1.key >> ${file_client}
echo "</key>" >> ${file_client}
echo "key-direction 1" >> ${file_client}
echo "<tls-auth>" >> ${file_client}
cat ${dir_openvpn}/tls-auth.key >> ${file_client}
echo "</tls-auth>" >> ${file_client}
fi
# Generates the custom client.ovpn
file_client="$homeDir/$1.ovpn"
cp ${file_client_tpl} ${file_client}
echo "<ca>" >> ${file_client}
cat ${dir_easy}/pki/ca.crt >> ${file_client}
echo "</ca>" >> ${file_client}
echo "<cert>" >> ${file_client}
cat ${dir_easy}/pki/issued/$1.crt >> ${file_client}
echo "</cert>" >> ${file_client}
echo "<key>" >> ${file_client}
cat ${dir_easy}/pki/private/$1.key >> ${file_client}
echo "</key>" >> ${file_client}
echo "key-direction 1" >> ${file_client}
echo "<tls-auth>" >> ${file_client}
cat ${dir_openvpn}/tls-auth.key >> ${file_client}
echo "</tls-auth>" >> ${file_client}
}
## function for install openvpn server
install_openvpn(){
clear
clear
cat <<EOF
Welcome to the secure OpenVPN installer (github.com/Angristan/OpenVPN-install)
@ -175,18 +140,19 @@ I need to know the IPv4 address of the network interface you want OpenVPN listen
If your server is running behind a NAT, (e.g. LowEndSpirit, Scaleway) leave the IP address as it is. (local/private IP)
Otherwise, it should be your public IPv4 address.
EOF
read -p "IP address: " -e -i $IP IP
read -p "IP address: " -e -i $IP IP
echo ""
echo "What port do you want for OpenVPN?"
read -p "Port: " -e -i 1194 PORT
echo ""
echo "What port do you want for OpenVPN?"
read -p "Port: " -e -i 1194 PORT
echo ""
echo "1/6.What protocol do you want for OpenVPN?"
echo "Unless UDP is blocked, you should not use TCP (unnecessarily slower)"
while [[ $PROTOCOL != "udp" && $PROTOCOL != "tcp" ]]; do
echo ""
echo "1/6.What protocol do you want for OpenVPN?"
echo "Unless UDP is blocked, you should not use TCP (unnecessarily slower)"
while [[ $PROTOCOL != "udp" && $PROTOCOL != "tcp" ]]; do
read -p "Protocol [udp/tcp]: " -e -i udp PROTOCOL
done
done
cat <<EOF
2/6.What DNS do you want to use with the VPN?
1) Current system resolvers (from /etc/resolv.conf)
@ -198,9 +164,10 @@ cat <<EOF
7) Yandex Basic (Russia)
8) AdGuard DNS (Russia)
EOF
while [[ $DNS != [1-8] ]]; do
while [[ $DNS != [1-8] ]]; do
read -p "DNS [1-8]: " -e -i 1 DNS
done
done
cat <<EOF
See https://github.com/Angristan/OpenVPN-install#encryption to learn more about
the encryption in OpenVPN and the choices I made in this script.
@ -218,10 +185,10 @@ They are relatively slower but as secure as AES.
6) CAMELLIA-256-CBC
7) SEED-CBC
EOF
while [[ $CIPHER != [1-7] ]]; do
while [[ $CIPHER != [1-7] ]]; do
read -p "Cipher [1-7]: " -e -i 1 CIPHER
done
case $CIPHER in
done
case $CIPHER in
1)
CIPHER="cipher AES-128-CBC"
;;
@ -243,16 +210,17 @@ EOF
7)
CIPHER="cipher SEED-CBC"
;;
esac
echo ""
echo "4/6.Choose what size of Diffie-Hellman key you want to use:"
echo " 1) 2048 bits (fastest)"
echo " 2) 3072 bits (recommended, best compromise)"
echo " 3) 4096 bits (most secure)"
while [[ $DH_KEY_SIZE != [1-3] ]]; do
esac
echo ""
echo "4/6.Choose what size of Diffie-Hellman key you want to use:"
echo " 1) 2048 bits (fastest)"
echo " 2) 3072 bits (recommended, best compromise)"
echo " 3) 4096 bits (most secure)"
while [[ $DH_KEY_SIZE != [1-3] ]]; do
read -p "DH key size [1-3]: " -e -i 2 DH_KEY_SIZE
done
case $DH_KEY_SIZE in
done
case $DH_KEY_SIZE in
1)
DH_KEY_SIZE="2048"
;;
@ -262,16 +230,17 @@ EOF
3)
DH_KEY_SIZE="4096"
;;
esac
echo ""
echo "5/6.Choose what size of RSA key you want to use:"
echo " 1) 2048 bits (fastest)"
echo " 2) 3072 bits (recommended, best compromise)"
echo " 3) 4096 bits (most secure)"
while [[ $RSA_KEY_SIZE != [1-3] ]]; do
esac
echo ""
echo "5/6.Choose what size of RSA key you want to use:"
echo " 1) 2048 bits (fastest)"
echo " 2) 3072 bits (recommended, best compromise)"
echo " 3) 4096 bits (most secure)"
while [[ $RSA_KEY_SIZE != [1-3] ]]; do
read -p "RSA key size [1-3]: " -e -i 2 RSA_KEY_SIZE
done
case $RSA_KEY_SIZE in
done
case $RSA_KEY_SIZE in
1)
RSA_KEY_SIZE="2048"
;;
@ -281,18 +250,20 @@ EOF
3)
RSA_KEY_SIZE="4096"
;;
esac
echo ""
echo "6/6.Finally, tell me a name for the client certificate and configuration"
while [[ $CLIENT = "" ]]; do
esac
echo ""
echo "6/6.Finally, tell me a name for the client certificate and configuration"
while [[ $CLIENT = "" ]]; do
echo "Please, use one word only, no special characters"
read -p "Client name: " -e -i client CLIENT
done
echo ""
echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
read -n1 -r -p "Press any key to continue..."
done
if [[ "$OS" = 'debian' ]]; then
echo ""
echo "Okay, that was all I needed. We are ready to setup your OpenVPN server now"
read -n1 -r -p "Press any key to continue..."
if [[ "$OS" = 'debian' ]]; then
apt-get install ca-certificates -y
# We add the OpenVPN repo to get the latest version.
# Debian 7
@ -353,7 +324,7 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
systemctl daemon-reload
systemctl enable iptables.service
fi
elif [[ "$OS" = 'centos' || "$OS" = 'fedora' ]]; then
elif [[ "$OS" = 'centos' || "$OS" = 'fedora' ]]; then
if [[ "$OS" = 'centos' ]]; then
yum install epel-release -y
fi
@ -392,7 +363,7 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
systemctl disable firewalld
systemctl mask firewalld
fi
else
else
# Else, the distro is ArchLinux
echo ""
echo ""
@ -416,34 +387,35 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
systemctl enable iptables
systemctl start iptables
fi
fi
# Find out if the machine uses nogroup or nobody for the permissionless group
if grep -qs "^nogroup:" /etc/group; then
fi
# Find out if the machine uses nogroup or nobody for the permissionless group
if grep -qs "^nogroup:" /etc/group; then
NOGROUP=nogroup
else
else
NOGROUP=nobody
fi
## function install_easyrsa
install_easyrsa
fi
## function install_easyrsa
install_easyrsa
cd ${dir_easy}/
echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
# Create the PKI, set up the CA, the DH params and the server + client certificates
./easyrsa init-pki
./easyrsa --batch build-ca nopass
openssl dhparam -out dh.pem $DH_KEY_SIZE
./easyrsa build-server-full server nopass
./easyrsa build-client-full $CLIENT nopass
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
# generate tls-auth key
openvpn --genkey --secret /etc/openvpn/tls-auth.key
# Move all the generated files
cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key ${dir_easy}/pki/crl.pem /etc/openvpn/
# Make cert revocation list readable for non-root
chmod 644 /etc/openvpn/crl.pem
cd ${dir_easy}/
echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
# Create the PKI, set up the CA, the DH params and the server + client certificates
./easyrsa init-pki
./easyrsa --batch build-ca nopass
openssl dhparam -out dh.pem $DH_KEY_SIZE
./easyrsa build-server-full server nopass
./easyrsa build-client-full $CLIENT nopass
EASYRSA_CRL_DAYS=3650 ./easyrsa gen-crl
# generate tls-auth key
openvpn --genkey --secret /etc/openvpn/tls-auth.key
# Move all the generated files
cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key ${dir_easy}/pki/crl.pem /etc/openvpn/
# Make cert revocation list readable for non-root
chmod 644 /etc/openvpn/crl.pem
# Generate server.conf
echo "port $PORT
# Generate server.conf
echo "port $PORT
proto ${PROTOCOL}
dev tun
user nobody
@ -454,8 +426,8 @@ keepalive 10 120
topology subnet
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
# DNS resolvers
case $DNS in
# DNS resolvers
case $DNS in
1)
# Obtain the resolvers from resolv.conf and use them for OpenVPN
grep -v '#' /etc/resolv.conf | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | while read line; do
@ -489,7 +461,7 @@ ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
echo 'push "dhcp-option DNS 176.103.130.130"'
echo 'push "dhcp-option DNS 176.103.130.131"'
;;
esac >> /etc/openvpn/server.conf
esac >> /etc/openvpn/server.conf
echo 'push "redirect-gateway def1 bypass-dhcp" '>> /etc/openvpn/server.conf
echo "crl-verify crl.pem
ca ca.crt
@ -505,11 +477,11 @@ tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
status openvpn.log
verb 3" >> /etc/openvpn/server.conf
## function set_firewall
set_firewall
## call function set_firewall
set_firewall
# And finally, restart OpenVPN
if [[ "$OS" = 'debian' ]]; then
# And finally, restart OpenVPN
if [[ "$OS" = 'debian' ]]; then
# Little hack to check for systemd
if pgrep systemd-journal; then
#Workaround to fix OpenVPN service on OpenVZ
@ -522,7 +494,7 @@ verb 3" >> /etc/openvpn/server.conf
else
/etc/init.d/openvpn restart
fi
else
else
if pgrep systemd-journal; then
if [[ "$OS" = 'arch' || "$OS" = 'fedora' ]]; then
#Workaround to avoid rewriting the entire script for Arch & Fedora
@ -539,10 +511,10 @@ verb 3" >> /etc/openvpn/server.conf
service openvpn restart
chkconfig openvpn on
fi
fi
# Try to detect a NATed connection and ask about it to potential LowEndSpirit/Scaleway users
EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
if [[ "$IP" != "$EXTERNALIP" ]]; then
fi
# Try to detect a NATed connection and ask about it to potential LowEndSpirit/Scaleway users
EXTERNALIP=$(wget -qO- ipv4.icanhazip.com)
if [[ "$IP" != "$EXTERNALIP" ]]; then
echo ""
echo "Looks like your server is behind a NAT!"
echo ""
@ -553,16 +525,16 @@ verb 3" >> /etc/openvpn/server.conf
if [[ "$USEREXTERNALIP" != "" ]]; then
IP=$USEREXTERNALIP
fi
fi
fi
# client-template.txt is created so we have a template to add further users later
echo "client" > ${file_client_tpl}
if [[ "$PROTOCOL" = 'udp' ]]; then
# client-template.txt is created so we have a template to add further users later
echo "client" > ${file_client_tpl}
if [[ "$PROTOCOL" = 'udp' ]]; then
echo "proto ${PROTOCOL}" >> ${file_client_tpl}
elif [[ "$PROTOCOL" = 'tcp' ]]; then
elif [[ "$PROTOCOL" = 'tcp' ]]; then
echo "proto ${PROTOCOL}-client" >> ${file_client_tpl}
fi
echo "remote $IP $PORT
fi
echo "remote $IP $PORT
dev tun
resolv-retry infinite
nobind
@ -578,36 +550,22 @@ tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
setenv opt block-outside-dns
verb 3" >> ${file_client_tpl}
# function Generate the custom client.ovpn
newclient "$CLIENT"
echo ""
echo "Finished!"
echo ""
echo "Your client config is available at $homeDir/$CLIENT.ovpn"
echo "If you want to add more clients, you simply need to run this script another time!"
# call function Generate the custom client.ovpn
generate_newclient "$CLIENT"
echo ""
echo "Finished!"
echo ""
echo "Your client config is available at $homeDir/$CLIENT.ovpn"
echo "If you want to add more clients, you simply need to run this script another time!"
}
detect_IP_NIC(){
# Try to get our IP from the system and fallback to the Internet.
# I do this to make the script compatible with NATed servers (LowEndSpirit/Scaleway)
# and to avoid getting an IPv6.
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=$(wget -qO- ipv4.icanhazip.com)
fi
# Get Internet network interface with default route
NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)
}
config_openvpn(){
while :
do
while :
do
clear
cat <<EOF
cat <<EOF
OpenVPN-install (github.com/Angristan/OpenVPN-install)
Looks like OpenVPN is already installed
@ -631,7 +589,7 @@ EOF
cd ${dir_easy}
${bin_easy} build-client-full $CLIENT nopass
# Generates the custom client.ovpn
newclient "$CLIENT"
generate_newclient "$CLIENT"
echo ""
echo "Client $CLIENT added, certs available at $homeDir/$CLIENT.ovpn"
exit
@ -709,25 +667,76 @@ EOF
;;
4) exit;;
esac
done
done
}
## function: determine the operating system version
detect_os_ver(){
if [[ -e /etc/debian_version ]]; then
OS="debian"
# Getting the version number, to verify that a recent version of OpenVPN is available
VERSION_ID=$(grep "VERSION_ID" /etc/os-release)
SYSCTL='/etc/sysctl.conf'
if [[ "$VERSION_ID" != 'VERSION_ID="7"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="8"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="9"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="12.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="14.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.04"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="16.10"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.04"' ]]; then
echo 'Your version of Debian/Ubuntu is not supported.'
echo "I can't install a recent version of OpenVPN on your system."
echo ''
echo "However, if you're using Debian unstable/testing, or Ubuntu beta,"
echo 'then you can continue, a recent version of OpenVPN is available on these.'
echo 'Keep in mind they are not supported, though.'
while [[ "$CONTINUE" != [yn] ]]; do
read -p 'Continue ? [y/n]: ' -e CONTINUE
done
if [[ 'n' = "$CONTINUE" ]]; then
echo 'Ok, bye !'
exit 4
fi
fi
elif [[ -e /etc/centos-release || -e /etc/redhat-release && ! -e /etc/fedora-release ]]; then
OS='centos'
SYSCTL='/etc/sysctl.conf'
elif [[ -e /etc/arch-release ]]; then
OS='arch'
SYSCTL='/etc/sysctl.d/openvpn.conf'
elif [[ -e /etc/fedora-release ]]; then
OS='fedora'
SYSCTL='/etc/sysctl.d/openvpn.conf'
else
echo "Looks like you aren't running this installer on a Debian, Ubuntu, CentOS or ArchLinux system"
exit 4
fi
}
detect_IP_NIC(){
# Try to get our IP from the system and fallback to the Internet.
# I do this to make the script compatible with NATed servers (LowEndSpirit/Scaleway)
# and to avoid getting an IPv6.
IP=$(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 -qO- ipv4.icanhazip.com)
fi
# Get Internet network interface with default route
NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)
}
################################# main #################################
detect_os_ver
detect_IP_NIC
main(){
detect_os_ver ## call function
detect_IP_NIC ## call function
## OpenVPN setup and first user creation
if [[ ! -e ${file_openvpn_conf} ]]; then
install_openvpn
install_openvpn ## call function
fi
#### server.conf exist.
if [[ -e ${file_openvpn_conf} ]]; then
config_openvpn
config_openvpn ## call function
fi
}
exit 0;
main $@
# exit 0;