mirror of
https://github.com/Nyr/openvpn-install.git
synced 2024-11-23 21:46:08 +03:00
Added ability to use UDP and TCP servers simultaneously
This commit is contained in:
Dmitry Kostkin
parent
6061a29028
commit
8543a8eb42
@ -35,7 +35,10 @@ else
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exit
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fi
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newclient () {
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UDPNETWORK="10.8.0.0"
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TCPNETWORK="10.9.0.0"
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newclient() {
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# Generates the custom client.ovpn
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cp /etc/openvpn/client-common.txt ~/$1.ovpn
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echo "<ca>" >> ~/$1.ovpn
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@ -52,7 +55,119 @@ newclient () {
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echo "</tls-auth>" >> ~/$1.ovpn
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}
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if [[ -e /etc/openvpn/server.conf ]]; then
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newserver() {
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local port=$1
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local protocol=$2
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local network=$3
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local dns=$4
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cat << EOF
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port $port
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proto $protocol
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server $network 255.255.255.0
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dev tun
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sndbuf 0
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rcvbuf 0
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ca ca.crt
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cert server.crt
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key server.key
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dh dh.pem
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auth SHA512
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tls-auth ta.key 0
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topology subnet
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ifconfig-pool-persist ipp.txt
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keepalive 10 120
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cipher AES-256-CBC
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comp-lzo
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user nobody
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group $GROUPNAME
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persist-key
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persist-tun
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crl-verify crl.pem
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status openvpn-status-$protocol.log
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verb 3
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push "redirect-gateway def1 bypass-dhcp"
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EOF
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for addr in $dns; do
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echo "push \"dhcp-option DNS $addr\""
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done
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}
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setfirewall() {
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local port=$1
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local protocol=$2
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local network=$3
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local ip=$4
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# Using both permanent and not permanent rules to avoid a firewalld reload.
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# We don't use --add-service=openvpn because that would only work with
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# the default port and protocol.
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firewall-cmd --zone=public --add-port=$port/$protocol
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firewall-cmd --zone=trusted --add-source=$network/24
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firewall-cmd --permanent --zone=public --add-port=$port/$protocol
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firewall-cmd --permanent --zone=trusted --add-source=$network/24
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# Set NAT for the VPN subnet
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firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s $network/24 ! -d $network/24 -j SNAT --to $ip
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firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s $network/24 ! -d $network/24 -j SNAT --to $ip
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}
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unsetfirewall() {
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local port=$1
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local protocol=$2
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local network=$3
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local ip=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep "\-s $network/24 '!' -d $network/24 -j SNAT --to " | cut -d " " -f 10)
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# Using both permanent and not permanent rules to avoid a firewalld reload.
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firewall-cmd --zone=public --remove-port=$port/$protocol
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firewall-cmd --zone=trusted --remove-source=$network/24
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firewall-cmd --permanent --zone=public --remove-port=$port/$protocol
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firewall-cmd --permanent --zone=trusted --remove-source=$network/24
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# Unset NAT for the VPN subnet
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firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s $network/24 ! -d $network/24 -j SNAT --to $ip
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firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s $network/24 ! -d $network/24 -j SNAT --to $ip
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}
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setiptables() {
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local port=$1
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local protocol=$2
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local network=$3
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local ip=$4
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# Needed to use rc.local with some systemd distros
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if [[ $OS = "debian" && ! -e $RCLOCAL ]]; then
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echo -e "#!/bin/sh -e\nexit 0" > $RCLOCAL
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fi
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chmod +x $RCLOCAL
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# Set NAT for the VPN subnet
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iptables -t nat -A POSTROUTING -s $network/24 ! -d $network/24 -j SNAT --to $ip
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sed -i "1 a\iptables -t nat -A POSTROUTING -s $network/24 ! -d $network/24 -j SNAT --to $ip" $RCLOCAL
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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 $network/24 -j ACCEPT
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iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
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sed -i "1 a\iptables -I INPUT -p $protocol --dport $port -j ACCEPT" $RCLOCAL
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sed -i "1 a\iptables -I FORWARD -s $network/24 -j ACCEPT" $RCLOCAL
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sed -i "1 a\iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT" $RCLOCAL
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fi
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}
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unsetiptables() {
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local port=$1
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local protocol=$2
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local network=$3
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IP=$(grep "iptables -t nat -A POSTROUTING -s $network/24 ! -d $network/24 -j SNAT --to " $RCLOCAL | cut -d " " -f 14)
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iptables -t nat -D POSTROUTING -s $network/24 ! -d $network/24 -j SNAT --to $IP
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sed -i "/iptables -t nat -A POSTROUTING -s $network\/24 ! -d $network\/24 -j SNAT --to /d" $RCLOCAL
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if iptables -L -n | grep -qE '^ACCEPT'; then
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iptables -D INPUT -p $protocol --dport $port -j ACCEPT
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iptables -D FORWARD -s $network/24 -j ACCEPT
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iptables -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
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sed -i "/iptables -I INPUT -p $protocol --dport $port -j ACCEPT/d" $RCLOCAL
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sed -i "/iptables -I FORWARD -s $network\/24 -j ACCEPT/d" $RCLOCAL
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sed -i "/iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT/d" $RCLOCAL
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fi
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}
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if [[ -d /etc/openvpn ]]; then
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while :
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do
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clear
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@ -65,7 +180,7 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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echo " 4) Exit"
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read -p "Select an option [1-4]: " option
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case $option in
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1)
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1)
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echo
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echo "Tell me a name for the client certificate."
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echo "Please, use one word only, no special characters."
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@ -117,36 +232,42 @@ if [[ -e /etc/openvpn/server.conf ]]; then
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fi
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exit
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;;
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3)
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3)
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echo
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read -p "Do you really want to remove OpenVPN? [y/N]: " -e REMOVE
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if [[ "$REMOVE" = 'y' || "$REMOVE" = 'Y' ]]; then
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PORT=$(grep '^port ' /etc/openvpn/server.conf | cut -d " " -f 2)
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PROTOCOL=$(grep '^proto ' /etc/openvpn/server.conf | cut -d " " -f 2)
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if [[ -f /etc/openvpn/server_udp.conf ]]; then
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UDPPORT=$(grep '^port ' /etc/openvpn/server_udp.conf | cut -d " " -f 2)
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fi
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if [[ -f /etc/openvpn/server_tcp.conf ]]; then
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TCPPORT=$(grep '^port ' /etc/openvpn/server_tcp.conf | cut -d " " -f 2)
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fi
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if pgrep firewalld; then
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IP=$(firewall-cmd --direct --get-rules ipv4 nat POSTROUTING | grep '\-s 10.8.0.0/24 '"'"'!'"'"' -d 10.8.0.0/24 -j SNAT --to ' | cut -d " " -f 10)
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# Using both permanent and not permanent rules to avoid a firewalld reload.
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firewall-cmd --zone=public --remove-port=$PORT/$PROTOCOL
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firewall-cmd --zone=trusted --remove-source=10.8.0.0/24
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firewall-cmd --permanent --zone=public --remove-port=$PORT/$PROTOCOL
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firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
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firewall-cmd --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
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firewall-cmd --permanent --direct --remove-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
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CMD="unsetfirewall"
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else
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IP=$(grep 'iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to ' $RCLOCAL | cut -d " " -f 14)
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iptables -t nat -D POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
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sed -i '/iptables -t nat -A POSTROUTING -s 10.8.0.0\/24 ! -d 10.8.0.0\/24 -j SNAT --to /d' $RCLOCAL
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if iptables -L -n | grep -qE '^ACCEPT'; then
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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 -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
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sed -i "/iptables -I INPUT -p $PROTOCOL --dport $PORT -j ACCEPT/d" $RCLOCAL
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sed -i "/iptables -I FORWARD -s 10.8.0.0\/24 -j ACCEPT/d" $RCLOCAL
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sed -i "/iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT/d" $RCLOCAL
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CMD="unsetiptables"
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fi
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if [[ -n $UDPPORT ]]; then
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$CMD $UDPPORT "udp" $UDPNETWORK
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fi
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if [[ -n $TCPPORT ]]; then
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$CMD $TCPPORT "tcp" $TCPNETWORK
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fi
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if pgrep systemd-journal; then
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if [[ -n $UDPPORT ]]; then
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systemctl disable openvpn@server_udp.service
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fi
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if [[ -n $TCPPORT ]]; then
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systemctl disable openvpn@server_tcp.service
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fi
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fi
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if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$PORT" != '1194' ]]; then
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semanage port -d -t openvpn_port_t -p $PROTOCOL $PORT
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if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing"; then
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if [[ -n $UDPPORT && $UDPPORT != "1194" ]]; then
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semanage port -d -t openvpn_port_t -p udp $UDPPORT
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fi
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if [[ -n $TCPPORT && $TCPPORT != "1194" ]]; then
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semanage port -d -t openvpn_port_t -p tcp $TCPPORT
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fi
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fi
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if [[ "$OS" = 'debian' ]]; then
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apt-get remove --purge -y openvpn
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@ -184,22 +305,16 @@ else
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echo "This server is behind NAT. What is the public IPv4 address or hostname?"
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read -p "Public IP address / hostname: " -e PUBLICIP
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fi
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echo
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echo "Which protocol do you want for OpenVPN connections?"
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echo " 1) UDP (recommended)"
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echo " 2) TCP"
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read -p "Protocol [1-2]: " -e -i 1 PROTOCOL
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case $PROTOCOL in
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1)
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PROTOCOL=udp
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;;
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2)
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PROTOCOL=tcp
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;;
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esac
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echo
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echo "What port do you want OpenVPN listening to?"
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read -p "Port: " -e -i 1194 PORT
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while [[ -z $UDPPORT && -z $TCPPORT ]]; do
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echo
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echo "What UDP port do you want OpenVPN listening to?"
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echo "If you don't want to create a UDP instance then leave it empty"
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read -p "Port: " -e -i 1194 UDPPORT
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echo
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echo "What TCP port do you want OpenVPN listening to?"
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echo "If you don't want to create a TCP instance then leave it empty"
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read -p "Port: " -e -i 443 TCPPORT
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done
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echo
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echo "Which DNS do you want to use with the VPN?"
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echo " 1) Current system resolvers"
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@ -208,6 +323,31 @@ else
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echo " 4) OpenDNS"
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echo " 5) Verisign"
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read -p "DNS [1-5]: " -e -i 1 DNS
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case $DNS in
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1)
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# Locate the proper resolv.conf
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# Needed for systems running systemd-resolved
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if grep -q "127.0.0.53" "/etc/resolv.conf"; then
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RESOLVCONF='/run/systemd/resolve/resolv.conf'
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else
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RESOLVCONF='/etc/resolv.conf'
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fi
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# Obtain the resolvers from resolv.conf and use them for OpenVPN
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DNS=$(grep -v '#' $RESOLVCONF | grep 'nameserver' | grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | tr '\n' ' ')
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;;
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2)
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DNS="1.1.1.1 1.0.0.1"
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;;
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3)
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DNS="8.8.8.8 8.8.4.4"
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;;
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4)
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DNS="208.67.222.222 208.67.220.220"
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;;
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5)
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DNS="64.6.64.6 64.6.65.6"
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;;
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esac
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echo
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echo "Finally, tell me your name for the client certificate."
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echo "Please, use one word only, no special characters."
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@ -245,64 +385,13 @@ else
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chown nobody:$GROUPNAME /etc/openvpn/crl.pem
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# Generate key for tls-auth
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openvpn --genkey --secret /etc/openvpn/ta.key
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# Generate server.conf
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echo "port $PORT
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proto $PROTOCOL
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dev tun
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sndbuf 0
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rcvbuf 0
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ca ca.crt
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cert server.crt
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key server.key
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dh dh.pem
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auth SHA512
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tls-auth ta.key 0
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topology subnet
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server 10.8.0.0 255.255.255.0
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ifconfig-pool-persist ipp.txt" > /etc/openvpn/server.conf
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echo 'push "redirect-gateway def1 bypass-dhcp"' >> /etc/openvpn/server.conf
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# DNS
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case $DNS in
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1)
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# Locate the proper resolv.conf
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# Needed for systems running systemd-resolved
|
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if grep -q "127.0.0.53" "/etc/resolv.conf"; then
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RESOLVCONF='/run/systemd/resolve/resolv.conf'
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else
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RESOLVCONF='/etc/resolv.conf'
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fi
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# Obtain the resolvers from resolv.conf and use them for OpenVPN
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grep -v '#' $RESOLVCONF | 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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done
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;;
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2)
|
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echo 'push "dhcp-option DNS 1.1.1.1"' >> /etc/openvpn/server.conf
|
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echo 'push "dhcp-option DNS 1.0.0.1"' >> /etc/openvpn/server.conf
|
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;;
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3)
|
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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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;;
|
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4)
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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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;;
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5)
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echo 'push "dhcp-option DNS 64.6.64.6"' >> /etc/openvpn/server.conf
|
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echo 'push "dhcp-option DNS 64.6.65.6"' >> /etc/openvpn/server.conf
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;;
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esac
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echo "keepalive 10 120
|
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cipher AES-256-CBC
|
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comp-lzo
|
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user nobody
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group $GROUPNAME
|
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persist-key
|
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persist-tun
|
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status openvpn-status.log
|
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verb 3
|
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crl-verify crl.pem" >> /etc/openvpn/server.conf
|
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# Generate server config
|
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if [[ -n $UDPPORT ]]; then
|
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newserver $UDPPORT "udp" $UDPNETWORK "$DNS" > /etc/openvpn/server_udp.conf
|
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fi
|
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if [[ -n $TCPPORT ]]; then
|
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newserver $TCPPORT "tcp-server" $TCPNETWORK "$DNS" > /etc/openvpn/server_tcp.conf
|
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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' /etc/sysctl.conf
|
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if ! grep -q "\<net.ipv4.ip_forward\>" /etc/sysctl.conf; then
|
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@ -311,59 +400,41 @@ crl-verify crl.pem" >> /etc/openvpn/server.conf
|
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# Avoid an unneeded reboot
|
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echo 1 > /proc/sys/net/ipv4/ip_forward
|
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if pgrep firewalld; then
|
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# Using both permanent and not permanent rules to avoid a firewalld
|
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# 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
|
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firewall-cmd --zone=trusted --add-source=10.8.0.0/24
|
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firewall-cmd --permanent --zone=public --add-port=$PORT/$PROTOCOL
|
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firewall-cmd --permanent --zone=trusted --add-source=10.8.0.0/24
|
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# Set NAT for the VPN subnet
|
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firewall-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
|
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firewall-cmd --permanent --direct --add-rule ipv4 nat POSTROUTING 0 -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
|
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CMD="setfirewall"
|
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else
|
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# Needed to use rc.local with some systemd distros
|
||||
if [[ "$OS" = 'debian' && ! -e $RCLOCAL ]]; then
|
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echo '#!/bin/sh -e
|
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exit 0' > $RCLOCAL
|
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fi
|
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chmod +x $RCLOCAL
|
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# Set NAT for the VPN subnet
|
||||
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP
|
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sed -i "1 a\iptables -t nat -A POSTROUTING -s 10.8.0.0/24 ! -d 10.8.0.0/24 -j SNAT --to $IP" $RCLOCAL
|
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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
|
||||
CMD="setiptables"
|
||||
fi
|
||||
if [[ -n $UDPPORT ]]; then
|
||||
$CMD $UDPPORT "udp" $UDPNETWORK $IP
|
||||
fi
|
||||
if [[ -n $TCPPORT ]]; then
|
||||
$CMD $TCPPORT "tcp" $TCPNETWORK $IP
|
||||
fi
|
||||
# If SELinux is enabled and a custom port was selected, we need this
|
||||
if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing" && [[ "$PORT" != '1194' ]]; then
|
||||
if sestatus 2>/dev/null | grep "Current mode" | grep -q "enforcing"; then
|
||||
# Install semanage if not already present
|
||||
if ! hash semanage 2>/dev/null; then
|
||||
yum install policycoreutils-python -y
|
||||
fi
|
||||
semanage port -a -t openvpn_port_t -p $PROTOCOL $PORT
|
||||
if [[ -n $UDPPORT && $UDPPORT != "1194" ]]; then
|
||||
semanage port -a -t openvpn_port_t -p udp $UDPPORT
|
||||
fi
|
||||
if [[ -n $TCPPORT && $TCPPORT != "1194" ]]; then
|
||||
semanage port -a -t openvpn_port_t -p tcp $TCPPORT
|
||||
fi
|
||||
fi
|
||||
# And finally, restart OpenVPN
|
||||
if [[ "$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
|
||||
if pgrep systemd-journal; then
|
||||
if [[ -n $UDPPORT ]]; then
|
||||
systemctl enable openvpn@server_udp.service
|
||||
fi
|
||||
if [[ -n $UDPPORT ]]; then
|
||||
systemctl enable openvpn@server_tcp.service
|
||||
fi
|
||||
systemctl restart openvpn
|
||||
else
|
||||
if pgrep systemd-journal; then
|
||||
systemctl restart openvpn@server.service
|
||||
systemctl enable openvpn@server.service
|
||||
if [[ "$OS" = 'debian' ]]; then
|
||||
/etc/init.d/openvpn restart
|
||||
else
|
||||
service openvpn restart
|
||||
chkconfig openvpn on
|
||||
@ -374,12 +445,16 @@ exit 0' > $RCLOCAL
|
||||
IP=$PUBLICIP
|
||||
fi
|
||||
# client-common.txt is created so we have a template to add further users later
|
||||
if [[ -n $UDPPORT ]]; then
|
||||
echo "remote $IP $UDPPORT udp" >> /etc/openvpn/client-common.txt
|
||||
fi
|
||||
if [[ -n $TCPPORT ]]; then
|
||||
echo "remote $IP $TCPPORT tcp-client" >> /etc/openvpn/client-common.txt
|
||||
fi
|
||||
echo "client
|
||||
dev tun
|
||||
proto $PROTOCOL
|
||||
sndbuf 0
|
||||
rcvbuf 0
|
||||
remote $IP $PORT
|
||||
resolv-retry infinite
|
||||
nobind
|
||||
persist-key
|
||||
@ -390,7 +465,7 @@ cipher AES-256-CBC
|
||||
comp-lzo
|
||||
setenv opt block-outside-dns
|
||||
key-direction 1
|
||||
verb 3" > /etc/openvpn/client-common.txt
|
||||
verb 3" >> /etc/openvpn/client-common.txt
|
||||
# Generates the custom client.ovpn
|
||||
newclient "$CLIENT"
|
||||
echo
|
||||
|
||||
Loading…
Reference in New Issue
Block a user