mirror of
https://github.com/angristan/openvpn-install.git
synced 2025-07-04 05:24:21 +02:00
yes ,my comment --xia.
This commit is contained in:
xiagw
parent
3564221dfc
commit
5ce4278bbf
@ -65,6 +65,69 @@ else
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exit 4
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fi
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install_easyrsa(){
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# An old version of easy-rsa was available by default in some openvpn packages
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if [[ -d /etc/openvpn/easy-rsa/ ]]; then
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rm -rf /etc/openvpn/easy-rsa/
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fi
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# Get easy-rsa
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wget -O ~/EasyRSA-3.0.3.tgz 'https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.3/EasyRSA-3.0.3.tgz'
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tar xzf ~/EasyRSA-3.0.3.tgz -C ~/
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mv ~/EasyRSA-3.0.3 /etc/openvpn/easy-rsa
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chown -R root:root /etc/openvpn/easy-rsa/
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rm -rf ~/EasyRSA-3.0.3.tgz
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}
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set_firewall(){
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# Create the sysctl configuration file if needed (mainly for Arch Linux)
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if [[ ! -e $SYSCTL ]]; then
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touch $SYSCTL
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fi
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# Enable net.ipv4.ip_forward for the system
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sed -i '/\<net.ipv4.ip_forward\>/c\net.ipv4.ip_forward=1' $SYSCTL
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if ! grep -q "\<net.ipv4.ip_forward\>" $SYSCTL; then
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echo 'net.ipv4.ip_forward=1' >> $SYSCTL
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fi
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# Avoid an unneeded reboot
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echo 1 > /proc/sys/net/ipv4/ip_forward
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# Set NAT for the VPN subnet
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iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
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# Save persitent iptables rules
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iptables-save > $IPTABLES
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if pgrep firewalld; then
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# We don't use --add-service=openvpn because that would only work with
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# the default port. Using both permanent and not permanent rules to
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# avoid a firewalld reload.
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firewall-cmd --zone=public --add-port=$PORT/${PROTOCOL}
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firewall-cmd --permanent --zone=public --add-port=$PORT/${PROTOCOL}
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firewall-cmd --zone=trusted --add-source=10.8.0.0/24
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firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
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fi
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if iptables -L -n | grep -qE 'REJECT|DROP'; then
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# If iptables has at least one REJECT rule, we asume this is needed.
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# Not the best approach but I can't think of other and this shouldn't
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# cause problems.
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iptables -I INPUT -p ${PROTOCOL} --dport $PORT -j ACCEPT
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iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
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iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
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# Save persitent OpenVPN rules
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iptables-save > $IPTABLES
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fi
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# If SELinux is enabled and a custom port was selected, we need this
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if hash sestatus 2>/dev/null; then
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if sestatus | grep "Current mode" | grep -qs "enforcing"; then
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if [[ "$PORT" != '1194' ]]; then
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# semanage isn't available in CentOS 6 by default
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if ! hash semanage 2>/dev/null; then
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yum install policycoreutils-python -y
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fi
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semanage port -a -t openvpn_port_t -p ${PROTOCOL} $PORT
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fi
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fi
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fi
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}
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newclient () {
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# Where to write the custom client.ovpn?
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if [ -e /home/$1 ]; then # if $1 is a user name
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@ -72,7 +135,7 @@ newclient () {
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elif [ ${SUDO_USER} ]; then # if not, use SUDO_USER
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homeDir="/home/${SUDO_USER}"
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else # if not SUDO_USER, use /root
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homeDir="/root"
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homeDir="${dir_openvpn}"
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fi
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# Generates the custom client.ovpn
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file_client="$homeDir/$1.ovpn"
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@ -106,7 +169,7 @@ if [[ -e ${file_openvpn_conf} ]]; then
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while :
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do
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clear
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cat <<'EOF'
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cat <<EOF
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OpenVPN-install (github.com/Angristan/OpenVPN-install)
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Looks like OpenVPN is already installed
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@ -176,11 +239,7 @@ EOF
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firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
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fi
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if iptables -L -n | grep -qE 'REJECT|DROP'; then
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if [[ "$PROTOCOL" = 'udp' ]]; then
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iptables -D INPUT -p udp --dport $PORT -j ACCEPT
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else
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iptables -D INPUT -p tcp --dport $PORT -j ACCEPT
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fi
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iptables -D INPUT -p ${PROTOCOL} --dport $PORT -j ACCEPT
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iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
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iptables-save > $IPTABLES
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fi
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@ -235,8 +294,8 @@ EOF
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echo ""
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echo "What protocol do you want for OpenVPN?"
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echo "Unless UDP is blocked, you should not use TCP (unnecessarily slower)"
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while [[ $PROTOCOL != "UDP" && $PROTOCOL != "TCP" ]]; do
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read -p "Protocol [UDP/TCP]: " -e -i UDP PROTOCOL
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while [[ $PROTOCOL != "udp" && $PROTOCOL != "tcp" ]]; do
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read -p "Protocol [udp/tcp]: " -e -i udp PROTOCOL
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done
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cat <<EOF
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What DNS do you want to use with the VPN?
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@ -249,7 +308,7 @@ What DNS do you want to use with the VPN?
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7) Yandex Basic (Russia)
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8) AdGuard DNS (Russia)
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EOF
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while [[ $DNS != "1" && $DNS != "2" && $DNS != "3" && $DNS != "4" && $DNS != "5" && $DNS != "6" && $DNS != "7" && $DNS != "8" ]]; do
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while [[ $DNS != [1-8] ]]; do
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read -p "DNS [1-8]: " -e -i 1 DNS
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done
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cat <<EOF
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@ -269,7 +328,7 @@ They are relatively slower but as secure as AES.
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6) CAMELLIA-256-CBC
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7) SEED-CBC
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EOF
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while [[ $CIPHER != "1" && $CIPHER != "2" && $CIPHER != "3" && $CIPHER != "4" && $CIPHER != "5" && $CIPHER != "6" && $CIPHER != "7" ]]; do
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while [[ $CIPHER != [1-7] ]]; do
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read -p "Cipher [1-7]: " -e -i 1 CIPHER
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done
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case $CIPHER in
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@ -300,7 +359,7 @@ EOF
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echo " 1) 2048 bits (fastest)"
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echo " 2) 3072 bits (recommended, best compromise)"
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echo " 3) 4096 bits (most secure)"
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while [[ $DH_KEY_SIZE != "1" && $DH_KEY_SIZE != "2" && $DH_KEY_SIZE != "3" ]]; do
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while [[ $DH_KEY_SIZE != [1-3] ]]; do
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read -p "DH key size [1-3]: " -e -i 2 DH_KEY_SIZE
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done
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case $DH_KEY_SIZE in
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@ -319,7 +378,7 @@ EOF
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echo " 1) 2048 bits (fastest)"
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echo " 2) 3072 bits (recommended, best compromise)"
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echo " 3) 4096 bits (most secure)"
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while [[ $RSA_KEY_SIZE != "1" && $RSA_KEY_SIZE != "2" && $RSA_KEY_SIZE != "3" ]]; do
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while [[ $RSA_KEY_SIZE != [1-3] ]]; do
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read -p "RSA key size [1-3]: " -e -i 2 RSA_KEY_SIZE
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done
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case $RSA_KEY_SIZE in
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@ -451,7 +510,7 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
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echo "Not doing that could cause problems between dependencies, or missing files in repositories."
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echo ""
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echo "Continuing will update your installed packages and install needed ones."
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while [[ $CONTINUE != "y" && $CONTINUE != "n" ]]; do
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while [[ $CONTINUE != [yn] ]]; do
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read -p "Continue ? [y/n]: " -e -i y CONTINUE
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done
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if [[ "$CONTINUE" = "n" ]]; then
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@ -474,18 +533,9 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
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else
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NOGROUP=nobody
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fi
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## function install_easyrsa
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install_easyrsa
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# An old version of easy-rsa was available by default in some openvpn packages
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if [[ -d /etc/openvpn/easy-rsa/ ]]; then
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rm -rf /etc/openvpn/easy-rsa/
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fi
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# Get easy-rsa
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wget -O ~/EasyRSA-3.0.3.tgz https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.3/EasyRSA-3.0.3.tgz
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tar xzf ~/EasyRSA-3.0.3.tgz -C ~/
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mv ~/EasyRSA-3.0.3/ /etc/openvpn/
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mv /etc/openvpn/EasyRSA-3.0.3/ /etc/openvpn/easy-rsa/
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chown -R root:root /etc/openvpn/easy-rsa/
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rm -rf ~/EasyRSA-3.0.3.tgz
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cd /etc/openvpn/easy-rsa/
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echo "set_var EASYRSA_KEY_SIZE $RSA_KEY_SIZE" > vars
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# Create the PKI, set up the CA, the DH params and the server + client certificates
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@ -498,18 +548,14 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
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# generate tls-auth key
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openvpn --genkey --secret /etc/openvpn/tls-auth.key
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# Move all the generated files
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cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn
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cp pki/ca.crt pki/private/ca.key dh.pem pki/issued/server.crt pki/private/server.key /etc/openvpn/easy-rsa/pki/crl.pem /etc/openvpn/
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# Make cert revocation list readable for non-root
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chmod 644 /etc/openvpn/crl.pem
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# Generate server.conf
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echo "port $PORT" > /etc/openvpn/server.conf
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if [[ "$PROTOCOL" = 'UDP' ]]; then
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echo "proto udp" >> /etc/openvpn/server.conf
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elif [[ "$PROTOCOL" = 'TCP' ]]; then
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echo "proto tcp" >> /etc/openvpn/server.conf
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fi
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echo "dev tun
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echo "port $PORT
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proto ${PROTOCOL}
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dev tun
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user nobody
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group $NOGROUP
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persist-key
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@ -523,37 +569,37 @@ ifconfig-pool-persist ipp.txt" >> /etc/openvpn/server.conf
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1)
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# Obtain the resolvers from resolv.conf and use them for OpenVPN
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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
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echo "push \"dhcp-option DNS $line\"" >> /etc/openvpn/server.conf
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echo "push \"dhcp-option DNS $line\""
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done
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;;
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2) #Quad9
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echo 'push "dhcp-option DNS 9.9.9.9"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 9.9.9.9"'
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;;
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3) #FDN
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echo 'push "dhcp-option DNS 80.67.169.12"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 80.67.169.40"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 80.67.169.12"'
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echo 'push "dhcp-option DNS 80.67.169.40"'
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;;
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4) #DNS.WATCH
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echo 'push "dhcp-option DNS 84.200.69.80"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 84.200.70.40"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 84.200.69.80"'
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echo 'push "dhcp-option DNS 84.200.70.40"'
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;;
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5) #OpenDNS
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echo 'push "dhcp-option DNS 208.67.222.222"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 208.67.220.220"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 208.67.222.222"'
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echo 'push "dhcp-option DNS 208.67.220.220"'
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;;
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6) #Google
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echo 'push "dhcp-option DNS 8.8.8.8"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 8.8.4.4"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 8.8.8.8"'
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echo 'push "dhcp-option DNS 8.8.4.4"'
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;;
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7) #Yandex Basic
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echo 'push "dhcp-option DNS 77.88.8.8"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 77.88.8.1"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 77.88.8.8"'
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echo 'push "dhcp-option DNS 77.88.8.1"'
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;;
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8) #AdGuard DNS
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echo 'push "dhcp-option DNS 176.103.130.130"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 176.103.130.131"' >> /etc/openvpn/server.conf
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echo 'push "dhcp-option DNS 176.103.130.130"'
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echo 'push "dhcp-option DNS 176.103.130.131"'
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;;
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esac
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esac >> /etc/openvpn/server.conf
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echo 'push "redirect-gateway def1 bypass-dhcp" '>> /etc/openvpn/server.conf
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echo "crl-verify crl.pem
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ca ca.crt
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@ -569,66 +615,9 @@ tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
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status openvpn.log
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verb 3" >> /etc/openvpn/server.conf
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# Create the sysctl configuration file if needed (mainly for Arch Linux)
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if [[ ! -e $SYSCTL ]]; then
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touch $SYSCTL
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fi
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## function set_firewall
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set_firewall
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# Enable net.ipv4.ip_forward for the system
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sed -i '/\<net.ipv4.ip_forward\>/c\net.ipv4.ip_forward=1' $SYSCTL
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if ! grep -q "\<net.ipv4.ip_forward\>" $SYSCTL; then
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echo 'net.ipv4.ip_forward=1' >> $SYSCTL
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fi
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# Avoid an unneeded reboot
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echo 1 > /proc/sys/net/ipv4/ip_forward
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# Set NAT for the VPN subnet
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iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
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# Save persitent iptables rules
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iptables-save > $IPTABLES
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if pgrep firewalld; then
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# We don't use --add-service=openvpn because that would only work with
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# the default port. Using both permanent and not permanent rules to
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# avoid a firewalld reload.
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if [[ "$PROTOCOL" = 'UDP' ]]; then
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firewall-cmd --zone=public --add-port=$PORT/udp
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firewall-cmd --permanent --zone=public --add-port=$PORT/udp
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elif [[ "$PROTOCOL" = 'TCP' ]]; then
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firewall-cmd --zone=public --add-port=$PORT/tcp
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firewall-cmd --permanent --zone=public --add-port=$PORT/tcp
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fi
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firewall-cmd --zone=trusted --add-source=10.8.0.0/24
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firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
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fi
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if iptables -L -n | grep -qE 'REJECT|DROP'; then
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# If iptables has at least one REJECT rule, we asume this is needed.
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# Not the best approach but I can't think of other and this shouldn't
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# cause problems.
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if [[ "$PROTOCOL" = 'UDP' ]]; then
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iptables -I INPUT -p udp --dport $PORT -j ACCEPT
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elif [[ "$PROTOCOL" = 'TCP' ]]; then
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iptables -I INPUT -p tcp --dport $PORT -j ACCEPT
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fi
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iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
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iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
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# Save persitent OpenVPN rules
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iptables-save > $IPTABLES
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fi
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# If SELinux is enabled and a custom port was selected, we need this
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if hash sestatus 2>/dev/null; then
|
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if sestatus | grep "Current mode" | grep -qs "enforcing"; then
|
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if [[ "$PORT" != '1194' ]]; then
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# semanage isn't available in CentOS 6 by default
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if ! hash semanage 2>/dev/null; then
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yum install policycoreutils-python -y
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fi
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if [[ "$PROTOCOL" = 'UDP' ]]; then
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semanage port -a -t openvpn_port_t -p udp $PORT
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elif [[ "$PROTOCOL" = 'TCP' ]]; then
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semanage port -a -t openvpn_port_t -p tcp $PORT
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fi
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fi
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fi
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fi
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# And finally, restart OpenVPN
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if [[ "$OS" = 'debian' ]]; then
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# Little hack to check for systemd
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@ -675,12 +664,13 @@ verb 3" >> /etc/openvpn/server.conf
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IP=$USEREXTERNALIP
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fi
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fi
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# client-template.txt is created so we have a template to add further users later
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echo "client" > ${file_client_tpl}
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if [[ "$PROTOCOL" = 'UDP' ]]; then
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echo "proto udp" >> ${file_client_tpl}
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elif [[ "$PROTOCOL" = 'TCP' ]]; then
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echo "proto tcp-client" >> ${file_client_tpl}
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if [[ "$PROTOCOL" = 'udp' ]]; then
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echo "proto ${PROTOCOL}" >> ${file_client_tpl}
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elif [[ "$PROTOCOL" = 'tcp' ]]; then
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echo "proto ${PROTOCOL}-client" >> ${file_client_tpl}
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fi
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echo "remote $IP $PORT
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dev tun
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@ -698,7 +688,7 @@ tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
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setenv opt block-outside-dns
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verb 3" >> ${file_client_tpl}
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# Generate the custom client.ovpn
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# function Generate the custom client.ovpn
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newclient "$CLIENT"
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echo ""
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echo "Finished!"
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Loading…
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