mirror of
https://github.com/angristan/openvpn-install.git
synced 2025-10-31 05:57:36 +01:00
Merge PR #83 : Remove rc.local and use an iptables systemd service
- Install iptables systemd service for Debian, Ubuntu and CentOS - Fix iptables install for ArcLinux - Remove the use rc.local file - Remove all iptables rules when removing openvpn (cf. #60 )
This commit is contained in:
Angristan
@@ -23,7 +23,7 @@ if [[ -e /etc/debian_version ]]; then
|
||||
OS="debian"
|
||||
# Getting the version number, to verify that a recent version of OpenVPN is available
|
||||
VERSION_ID=$(cat /etc/os-release | grep "VERSION_ID")
|
||||
RCLOCAL='/etc/rc.local'
|
||||
IPTABLES='/etc/iptables/iptables.rules'
|
||||
SYSCTL='/etc/sysctl.conf'
|
||||
if [[ "$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"' ]] && [[ "$VERSION_ID" != 'VERSION_ID="17.04"' ]]; then
|
||||
echo "Your version of Debian/Ubuntu is not supported."
|
||||
@@ -42,13 +42,11 @@ if [[ -e /etc/debian_version ]]; then
|
||||
fi
|
||||
elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
|
||||
OS=centos
|
||||
RCLOCAL='/etc/rc.d/rc.local'
|
||||
IPTABLES='/etc/iptables/iptables.rules'
|
||||
SYSCTL='/etc/sysctl.conf'
|
||||
# Needed for CentOS 7
|
||||
chmod +x /etc/rc.d/rc.local
|
||||
elif [[ -e /etc/arch-release ]]; then
|
||||
OS=arch
|
||||
RCLOCAL='/etc/rc.local'
|
||||
IPTABLES='/etc/iptables/iptables.rules'
|
||||
SYSCTL='/etc/sysctl.d/openvpn.conf'
|
||||
else
|
||||
echo "Looks like you aren't running this installer on a Debian, Ubuntu, CentOS or ArchLinux system"
|
||||
@@ -89,7 +87,7 @@ if [[ "$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+)')
|
||||
NIC=$(ip -4 route ls | grep default | grep -Po '(?<=dev )(\S+)' | head -1)
|
||||
|
||||
if [[ -e /etc/openvpn/server.conf ]]; then
|
||||
while :
|
||||
@@ -162,11 +160,16 @@ if [[ -e /etc/openvpn/server.conf ]]; then
|
||||
firewall-cmd --permanent --zone=trusted --remove-source=10.8.0.0/24
|
||||
fi
|
||||
if iptables -L -n | grep -qE 'REJECT|DROP'; then
|
||||
sed -i "/iptables -I INPUT -p udp --dport $PORT -j ACCEPT/d" $RCLOCAL
|
||||
sed -i "/iptables -I FORWARD -s 10.8.0.0\/24 -j ACCEPT/d" $RCLOCAL
|
||||
sed -i "/iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT/d" $RCLOCAL
|
||||
if [[ "$PROTOCOL" = 'udp' ]]; then
|
||||
iptables -D INPUT -p udp --dport $PORT -j ACCEPT
|
||||
else
|
||||
iptables -D INPUT -p tcp --dport $PORT -j ACCEPT
|
||||
fi
|
||||
iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||
iptables-save > $IPTABLES
|
||||
fi
|
||||
sed -i '/iptables -t nat -A POSTROUTING -s 10.8.0.0\/24 -j SNAT --to /d' $RCLOCAL
|
||||
iptables -t nat -D POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
|
||||
iptables-save > $IPTABLES
|
||||
if hash sestatus 2>/dev/null; then
|
||||
if sestatus | grep "Current mode" | grep -qs "enforcing"; then
|
||||
if [[ "$PORT" != '1194' ]]; then
|
||||
@@ -347,9 +350,73 @@ else
|
||||
# Ubuntu >= 16.04 and Debian > 8 have OpenVPN > 2.3.3 without the need of a third party repository.
|
||||
# The we install OpenVPN
|
||||
apt-get install openvpn iptables openssl wget ca-certificates curl -y
|
||||
# Install iptables service
|
||||
if [[ ! -e /etc/systemd/system/iptables.service ]]; then
|
||||
mkdir /etc/iptables
|
||||
iptables-save > /etc/iptables/iptables.rules
|
||||
echo "#!/bin/sh
|
||||
iptables -F
|
||||
iptables -X
|
||||
iptables -t nat -F
|
||||
iptables -t nat -X
|
||||
iptables -t mangle -F
|
||||
iptables -t mangle -X
|
||||
iptables -P INPUT ACCEPT
|
||||
iptables -P FORWARD ACCEPT
|
||||
iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
|
||||
chmod +x /etc/iptables/flush-iptables.sh
|
||||
echo "[Unit]
|
||||
Description=Packet Filtering Framework
|
||||
DefaultDependencies=no
|
||||
Before=network-pre.target
|
||||
Wants=network-pre.target
|
||||
[Service]
|
||||
Type=oneshot
|
||||
ExecStart=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||
ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||
ExecStop=/etc/iptables/flush-iptables.sh
|
||||
RemainAfterExit=yes
|
||||
[Install]
|
||||
WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
|
||||
systemctl daemon-reload
|
||||
systemctl enable iptables.service
|
||||
fi
|
||||
elif [[ "$OS" = 'centos' ]]; then
|
||||
yum install epel-release -y
|
||||
yum install openvpn iptables openssl wget ca-certificates curl -y
|
||||
# Install iptables service
|
||||
if [[ ! -e /etc/systemd/system/iptables.service ]]; then
|
||||
mkdir /etc/iptables
|
||||
iptables-save > /etc/iptables/iptables.rules
|
||||
echo "#!/bin/sh
|
||||
iptables -F
|
||||
iptables -X
|
||||
iptables -t nat -F
|
||||
iptables -t nat -X
|
||||
iptables -t mangle -F
|
||||
iptables -t mangle -X
|
||||
iptables -P INPUT ACCEPT
|
||||
iptables -P FORWARD ACCEPT
|
||||
iptables -P OUTPUT ACCEPT" > /etc/iptables/flush-iptables.sh
|
||||
chmod +x /etc/iptables/flush-iptables.sh
|
||||
echo "[Unit]
|
||||
Description=Packet Filtering Framework
|
||||
DefaultDependencies=no
|
||||
Before=network-pre.target
|
||||
Wants=network-pre.target
|
||||
[Service]
|
||||
Type=oneshot
|
||||
ExecStart=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||
ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules
|
||||
ExecStop=/etc/iptables/flush-iptables.sh
|
||||
RemainAfterExit=yes
|
||||
[Install]
|
||||
WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
|
||||
systemctl daemon-reload
|
||||
systemctl enable iptables.service
|
||||
# Disable firewalld to allow iptables to start upon reboot
|
||||
systemctl disable firewalld
|
||||
fi
|
||||
else
|
||||
# Else, the distro is ArchLinux
|
||||
echo ""
|
||||
@@ -365,39 +432,21 @@ else
|
||||
echo "Ok, bye !"
|
||||
exit 4
|
||||
fi
|
||||
|
||||
|
||||
if [[ "$OS" = 'arch' ]]; then
|
||||
# Install rc.local
|
||||
echo "[Unit]
|
||||
Description=/etc/rc.local compatibility
|
||||
|
||||
[Service]
|
||||
Type=oneshot
|
||||
ExecStart=/etc/rc.local
|
||||
RemainAfterExit=yes
|
||||
|
||||
[Install]
|
||||
WantedBy=multi-user.target" > /etc/systemd/system/rc-local.service
|
||||
chmod +x /etc/rc.local
|
||||
systemctl enable rc-local.service
|
||||
if ! grep '#!' $RCLOCAL; then
|
||||
echo "#!/bin/bash" > $RCLOCAL
|
||||
fi
|
||||
fi
|
||||
|
||||
# Install dependencies
|
||||
pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm
|
||||
if [[ "$OS" = 'arch' ]]; then
|
||||
touch /etc/iptables/iptables.rules # iptables won't start if this file does not exist
|
||||
# Install dependencies
|
||||
pacman -Syu openvpn iptables openssl wget ca-certificates curl --needed --noconfirm
|
||||
iptables-save > /etc/iptables/iptables.rules # iptables won't start if this file does not exist
|
||||
systemctl daemon-reload
|
||||
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
|
||||
NOGROUP=nogroup
|
||||
NOGROUP=nogroup
|
||||
else
|
||||
NOGROUP=nobody
|
||||
NOGROUP=nobody
|
||||
fi
|
||||
|
||||
# An old version of easy-rsa was available by default in some openvpn packages
|
||||
@@ -503,15 +552,10 @@ verb 3" >> /etc/openvpn/server.conf
|
||||
fi
|
||||
# Avoid an unneeded reboot
|
||||
echo 1 > /proc/sys/net/ipv4/ip_forward
|
||||
# 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 -o $NIC -s 10.8.0.0/24 -j MASQUERADE
|
||||
sed -i "1 a\iptables -t nat -A POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE" $RCLOCAL
|
||||
# Save persitent iptables rules
|
||||
iptables-save > $IPTABLES
|
||||
if pgrep firewalld; then
|
||||
# We don't use --add-service=openvpn because that would only work with
|
||||
# the default port. Using both permanent and not permanent rules to
|
||||
@@ -537,13 +581,8 @@ verb 3" >> /etc/openvpn/server.conf
|
||||
fi
|
||||
iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
|
||||
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
||||
if [[ "$PROTOCOL" = 'UDP' ]]; then
|
||||
sed -i "1 a\iptables -I INPUT -p udp --dport $PORT -j ACCEPT" $RCLOCAL
|
||||
elif [[ "$PROTOCOL" = 'TCP' ]]; then
|
||||
sed -i "1 a\iptables -I INPUT -p tcp --dport $PORT -j ACCEPT" $RCLOCAL
|
||||
fi
|
||||
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
|
||||
# Save persitent OpenVPN rules
|
||||
iptables-save > $IPTABLES
|
||||
fi
|
||||
# If SELinux is enabled and a custom port was selected, we need this
|
||||
if hash sestatus 2>/dev/null; then
|
||||
@@ -603,10 +642,10 @@ verb 3" >> /etc/openvpn/server.conf
|
||||
echo ""
|
||||
echo "Looks like your server is behind a NAT!"
|
||||
echo ""
|
||||
echo "If your server is NATed (e.g. LowEndSpirit, Scaleway, or behind a router),"
|
||||
echo "then I need to know the address that can be used to access it from outside."
|
||||
echo "If that's not the case, just ignore this and leave the next field blank"
|
||||
read -p "External IP or domain name: " -e USEREXTERNALIP
|
||||
echo "If your server is NATed (e.g. LowEndSpirit, Scaleway, or behind a router),"
|
||||
echo "then I need to know the address that can be used to access it from outside."
|
||||
echo "If that's not the case, just ignore this and leave the next field blank"
|
||||
read -p "External IP or domain name: " -e USEREXTERNALIP
|
||||
if [[ "$USEREXTERNALIP" != "" ]]; then
|
||||
IP=$USEREXTERNALIP
|
||||
fi
|
||||
@@ -642,4 +681,4 @@ verb 3" >> /etc/openvpn/client-template.txt
|
||||
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!"
|
||||
fi
|
||||
exit 0;
|
||||
exit 0;
|
||||
Reference in New Issue
Block a user