diff --git a/vpnsetup.sh b/vpnsetup.sh index 5d90867..749d856 100644 --- a/vpnsetup.sh +++ b/vpnsetup.sh @@ -26,41 +26,12 @@ fi # Please define your own values for these variables # Escape *all* non-alphanumeric characters with a backslash (or 3 backslashes for \ and "). # Examples: \ --> \\\\, " --> \\\", ' --> \', $ --> \$, ` --> \`, [space] --> \[space] - IPSEC_PSK=your_very_secure_key VPN_USER=your_username VPN_PASSWORD=your_very_secure_password -# ----------------- -# IMPORTANT NOTES -# ----------------- - -# To support multiple VPN users with different credentials, just edit a few lines below. -# See: https://gist.github.com/hwdsl2/123b886f29f4c689f531 - -# For **Windows users**, a one-time registry change is required if the VPN server -# and/or client is behind NAT (e.g. home router). Refer to "Error 809" on this page: -# https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809 - -# **Android 6.0 users**: Edit /etc/ipsec.conf and append ",aes256-sha2_256" to the end of -# both "ike=" and "phase2alg=", then add a new line "sha2-truncbug=yes". Must start lines -# with two spaces. Finally, run "service ipsec restart". - -# **iPhone/iOS users**: In iOS settings, choose L2TP (instead of IPSec) for the VPN type. -# In case you're unable to connect, try replacing this line in /etc/ipsec.conf: -# "rightprotoport=17/%any" with "rightprotoport=17/0". Then restart "ipsec" service. - -# Clients are configured to use "Google Public DNS" when the VPN connection is active. -# This setting is controlled by "ms-dns" in /etc/ppp/options.xl2tpd. - -# If using Amazon EC2, these ports must be open in the instance's security group: -# UDP ports 500 & 4500 (for the VPN), and TCP port 22 (optional, for SSH). - -# If your server uses a custom SSH port (not 22), or if you wish to allow other services -# through IPTables, be sure to edit the IPTables rules below before running this script. - -# This script will backup your existing configuration files before overwriting them. -# Backups can be found in the same folder as the original, with .old-date/time suffix. +# IMPORTANT: Be sure to read important notes at the URL below: +# https://github.com/hwdsl2/setup-ipsec-vpn#important-notes if [ "$(lsb_release -si)" != "Ubuntu" ] && [ "$(lsb_release -si)" != "Debian" ]; then echo "Looks like you aren't running this script on a Ubuntu or Debian system." @@ -79,9 +50,10 @@ if [ "$(id -u)" != 0 ]; then fi # Check for empty VPN variables -[ -z "$IPSEC_PSK" ] && { echo "'IPSEC_PSK' cannot be empty. Please edit the VPN script."; exit 1; } -[ -z "$VPN_USER" ] && { echo "'VPN_USER' cannot be empty. Please edit the VPN script."; exit 1; } -[ -z "$VPN_PASSWORD" ] && { echo "'VPN_PASSWORD' cannot be empty. Please edit the VPN script."; exit 1; } +if [ -z "$IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then + echo "Sorry, the VPN credentials cannot be empty. Please re-edit the VPN script." + exit 1 +fi # Create and change to working dir mkdir -p /opt/src @@ -93,29 +65,28 @@ apt-get -y update apt-get -y install wget dnsutils sed nano echo -echo 'Please wait... Trying to find Public IP and Private IP of this server.' +echo 'Please wait... Trying to find Public/Private IP of this server.' echo echo 'If the script hangs here for more than a few minutes, press Ctrl-C to interrupt,' -echo 'then edit it and comment out the next two lines PUBLIC_IP= and PRIVATE_IP= ,' -echo 'OR replace them with the actual IPs. If your server only has a public IP,' -echo 'put that public IP on both lines.' +echo 'then edit and comment out the next two lines PUBLIC_IP= and PRIVATE_IP=, or replace' +echo 'them with actual IPs. If your server only has a public IP, put it on both lines.' echo # In Amazon EC2, these two variables will be found automatically. # For all other servers, you may replace them with the actual IPs, # or comment out and let the script auto-detect in the next section. -# If your server only has a public IP, put that public IP on both lines. +# If your server only has a public IP, put it on both lines. PUBLIC_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/public-ipv4') PRIVATE_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/local-ipv4') -# Attempt to find server IPs automatically for non-EC2 servers +# Attempt to find server IPs for non-EC2 servers [ -z "$PUBLIC_IP" ] && PUBLIC_IP=$(dig +short myip.opendns.com @resolver1.opendns.com) [ -z "$PUBLIC_IP" ] && PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com) [ -z "$PUBLIC_IP" ] && PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipecho.net/plain) [ -z "$PRIVATE_IP" ] && PRIVATE_IP=$(ip -4 route get 1 | awk '{print $NF;exit}') [ -z "$PRIVATE_IP" ] && PRIVATE_IP=$(ifconfig eth0 | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*') -# Check public/private IPs for correct format +# Check IPs for correct format IP_REGEX="^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$" if printf %s "$PUBLIC_IP" | grep -vEq "$IP_REGEX"; then echo "Could not find valid Public IP, please edit the VPN script manually." @@ -149,6 +120,7 @@ cd "libreswan-${SWAN_VER}" || { echo "Failed to enter Libreswan source directory make programs && make install # Prepare various config files +# Create Libreswan configuration /bin/cp -f /etc/ipsec.conf "/etc/ipsec.conf.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null cat > /etc/ipsec.conf </dev/null cat > /etc/ipsec.secrets </dev/null cat > /etc/xl2tpd/xl2tpd.conf </dev/null cat > /etc/ppp/options.xl2tpd </dev/null - cat > /etc/ppp/chap-secrets </dev/null cat >> /etc/sysctl.conf </dev/null /usr/sbin/service fail2ban stop >/dev/null 2>&1 if [ "$(/sbin/iptables-save | grep -c '^\-')" = "0" ]; then - cat > /etc/iptables.rules < /etc/iptables.rules -echo "# Modified by hwdsl2 VPN script" >> /etc/iptables.rules - +echo "# Modified by hwdsl2 VPN script" > /etc/iptables.rules +/sbin/iptables-save >> /etc/iptables.rules fi fi +# Create basic IP6Tables rules if ! grep -qs "hwdsl2 VPN script" /etc/ip6tables.rules; then - /bin/cp -f /etc/ip6tables.rules "/etc/ip6tables.rules.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null cat > /etc/ip6tables.rules < /etc/ip6tables.rules < /etc/network/if-pre-up.d/iptablesload < /etc/network/if-pre-up.d/ip6tablesload </dev/null /bin/sed --follow-symlinks -i -e '/^exit 0/d' /etc/rc.local cat >> /etc/rc.local <> /etc/rc.local < /proc/sys/net/ipv4/ip_forward exit 0 EOF - fi +# Initialize Libreswan database if [ ! -f /etc/ipsec.d/cert8.db ] ; then echo > /var/tmp/libreswan-nss-pwd /usr/bin/certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d /bin/rm -f /var/tmp/libreswan-nss-pwd fi +# Reload sysctl.conf settings /sbin/sysctl -p + +# Update attributes of various files /bin/chmod +x /etc/rc.local /bin/chmod +x /etc/network/if-pre-up.d/iptablesload /bin/chmod +x /etc/network/if-pre-up.d/ip6tablesload /bin/chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* +# Apply new IPTables rules /sbin/iptables-restore < /etc/iptables.rules /sbin/ip6tables-restore < /etc/ip6tables.rules +# Restart services /usr/sbin/service fail2ban stop >/dev/null 2>&1 /usr/sbin/service ipsec stop >/dev/null 2>&1 /usr/sbin/service xl2tpd stop >/dev/null 2>&1 - /usr/sbin/service fail2ban start /usr/sbin/service ipsec start /usr/sbin/service xl2tpd start diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh index 60797c0..d581c21 100644 --- a/vpnsetup_centos.sh +++ b/vpnsetup_centos.sh @@ -25,41 +25,12 @@ fi # Please define your own values for these variables # Escape *all* non-alphanumeric characters with a backslash (or 3 backslashes for \ and "). # Examples: \ --> \\\\, " --> \\\", ' --> \', $ --> \$, ` --> \`, [space] --> \[space] - IPSEC_PSK=your_very_secure_key VPN_USER=your_username VPN_PASSWORD=your_very_secure_password -# ----------------- -# IMPORTANT NOTES -# ----------------- - -# To support multiple VPN users with different credentials, just edit a few lines below. -# See: https://gist.github.com/hwdsl2/123b886f29f4c689f531 - -# For **Windows users**, a one-time registry change is required if the VPN server -# and/or client is behind NAT (e.g. home router). Refer to "Error 809" on this page: -# https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809 - -# **Android 6.0 users**: Edit /etc/ipsec.conf and append ",aes256-sha2_256" to the end of -# both "ike=" and "phase2alg=", then add a new line "sha2-truncbug=yes". Must start lines -# with two spaces. Finally, run "service ipsec restart". - -# **iPhone/iOS users**: In iOS settings, choose L2TP (instead of IPSec) for the VPN type. -# In case you're unable to connect, try replacing this line in /etc/ipsec.conf: -# "rightprotoport=17/%any" with "rightprotoport=17/0". Then restart "ipsec" service. - -# Clients are configured to use "Google Public DNS" when the VPN connection is active. -# This setting is controlled by "ms-dns" in /etc/ppp/options.xl2tpd. - -# If using Amazon EC2, these ports must be open in the instance's security group: -# UDP ports 500 & 4500 (for the VPN), and TCP port 22 (optional, for SSH). - -# If your server uses a custom SSH port (not 22), or if you wish to allow other services -# through IPTables, be sure to edit the IPTables rules below before running this script. - -# This script will backup your existing configuration files before overwriting them. -# Backups can be found in the same folder as the original, with .old-date/time suffix. +# IMPORTANT: Be sure to read important notes at the URL below: +# https://github.com/hwdsl2/setup-ipsec-vpn#important-notes if [ ! -f /etc/redhat-release ]; then echo "Looks like you aren't running this script on a CentOS/RHEL system." @@ -88,9 +59,10 @@ if [ "$(id -u)" != 0 ]; then fi # Check for empty VPN variables -[ -z "$IPSEC_PSK" ] && { echo "'IPSEC_PSK' cannot be empty. Please edit the VPN script."; exit 1; } -[ -z "$VPN_USER" ] && { echo "'VPN_USER' cannot be empty. Please edit the VPN script."; exit 1; } -[ -z "$VPN_PASSWORD" ] && { echo "'VPN_PASSWORD' cannot be empty. Please edit the VPN script."; exit 1; } +if [ -z "$IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then + echo "Sorry, the VPN credentials cannot be empty. Please re-edit the VPN script." + exit 1 +fi # Create and change to working dir mkdir -p /opt/src @@ -100,29 +72,28 @@ cd /opt/src || { echo "Failed to change working directory to /opt/src. Aborting. yum -y install wget bind-utils nano echo -echo 'Please wait... Trying to find Public IP and Private IP of this server.' +echo 'Please wait... Trying to find Public/Private IP of this server.' echo echo 'If the script hangs here for more than a few minutes, press Ctrl-C to interrupt,' -echo 'then edit it and comment out the next two lines PUBLIC_IP= and PRIVATE_IP= ,' -echo 'OR replace them with the actual IPs. If your server only has a public IP,' -echo 'put that public IP on both lines.' +echo 'then edit and comment out the next two lines PUBLIC_IP= and PRIVATE_IP=, or replace' +echo 'them with actual IPs. If your server only has a public IP, put it on both lines.' echo # In Amazon EC2, these two variables will be found automatically. # For all other servers, you may replace them with the actual IPs, # or comment out and let the script auto-detect in the next section. -# If your server only has a public IP, put that public IP on both lines. +# If your server only has a public IP, put it on both lines. PUBLIC_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/public-ipv4') PRIVATE_IP=$(wget --retry-connrefused -t 3 -T 15 -qO- 'http://169.254.169.254/latest/meta-data/local-ipv4') -# Attempt to find server IPs automatically for non-EC2 servers +# Attempt to find server IPs for non-EC2 servers [ -z "$PUBLIC_IP" ] && PUBLIC_IP=$(dig +short myip.opendns.com @resolver1.opendns.com) [ -z "$PUBLIC_IP" ] && PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipv4.icanhazip.com) [ -z "$PUBLIC_IP" ] && PUBLIC_IP=$(wget -t 3 -T 15 -qO- http://ipecho.net/plain) [ -z "$PRIVATE_IP" ] && PRIVATE_IP=$(ip -4 route get 1 | awk '{print $NF;exit}') [ -z "$PRIVATE_IP" ] && PRIVATE_IP=$(ifconfig eth0 | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*') -# Check public/private IPs for correct format +# Check IPs for correct format IP_REGEX="^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$" if printf %s "$PUBLIC_IP" | grep -vEq "$IP_REGEX"; then echo "Could not find valid Public IP, please edit the VPN script manually." @@ -188,6 +159,7 @@ cd "libreswan-${SWAN_VER}" || { echo "Failed to enter Libreswan source directory make programs && make install # Prepare various config files +# Create Libreswan configuration /bin/cp -f /etc/ipsec.conf "/etc/ipsec.conf.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null cat > /etc/ipsec.conf </dev/null cat > /etc/ipsec.secrets </dev/null cat > /etc/xl2tpd/xl2tpd.conf </dev/null cat > /etc/ppp/options.xl2tpd </dev/null - cat > /etc/ppp/chap-secrets </dev/null cat >> /etc/sysctl.conf </dev/null /sbin/service fail2ban stop >/dev/null 2>&1 if [ "$(/sbin/iptables-save | grep -c '^\-')" = "0" ]; then - cat > /etc/sysconfig/iptables < /etc/sysconfig/iptables -echo "# Modified by hwdsl2 VPN script" >> /etc/sysconfig/iptables - +echo "# Modified by hwdsl2 VPN script" > /etc/sysconfig/iptables +/sbin/iptables-save >> /etc/sysconfig/iptables fi fi +# Create basic IP6Tables rules if ! grep -qs "hwdsl2 VPN script" /etc/sysconfig/ip6tables; then - /bin/cp -f /etc/sysconfig/ip6tables "/etc/sysconfig/ip6tables.old-$(date +%Y-%m-%d-%H:%M:%S)" 2>/dev/null cat > /etc/sysconfig/ip6tables < /etc/sysconfig/ip6tables < /etc/fail2ban/jail.local </dev/null cat >> /etc/rc.local <> /etc/rc.local < /proc/sys/net/ipv4/ip_forward EOF - fi +# Initialize Libreswan database if [ ! -f /etc/ipsec.d/cert8.db ] ; then echo > /var/tmp/libreswan-nss-pwd /usr/bin/certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d @@ -453,17 +422,21 @@ restorecon /etc/ipsec.d/*db 2>/dev/null restorecon /usr/local/sbin -Rv 2>/dev/null restorecon /usr/local/libexec/ipsec -Rv 2>/dev/null +# Reload sysctl.conf settings /sbin/sysctl -p + +# Update attributes of various files /bin/chmod +x /etc/rc.local /bin/chmod 600 /etc/ipsec.secrets* /etc/ppp/chap-secrets* +# Apply new IPTables rules /sbin/iptables-restore < /etc/sysconfig/iptables /sbin/ip6tables-restore < /etc/sysconfig/ip6tables +# Restart services /sbin/service fail2ban stop >/dev/null 2>&1 /sbin/service ipsec stop >/dev/null 2>&1 /sbin/service xl2tpd stop >/dev/null 2>&1 - /sbin/service fail2ban start /sbin/service ipsec start /sbin/service xl2tpd start