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l2tp.sh
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l2tp.sh
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#!/usr/bin/env bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
#=======================================================================#
# System Supported: CentOS 6+ / Debian 7+ / Ubuntu 12+ #
# Description: L2TP VPN Auto Installer #
# Author: Teddysun <i@teddysun.com> #
# Intro: https://teddysun.com/448.html #
#=======================================================================#
cur_dir=`pwd`
libreswan_filename="libreswan-3.20"
rootness(){
if [[ $EUID -ne 0 ]]; then
echo "Error:This script must be run as root!" 1>&2
exit 1
fi
}
tunavailable(){
if [[ ! -e /dev/net/tun ]]; then
echo "Error:TUN/TAP is not available!" 1>&2
exit 1
fi
}
disable_selinux(){
if [ -s /etc/selinux/config ] && grep 'SELINUX=enforcing' /etc/selinux/config; then
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
setenforce 0
fi
}
get_opsy(){
[ -f /etc/redhat-release ] && awk '{print ($1,$3~/^[0-9]/?$3:$4)}' /etc/redhat-release && return
[ -f /etc/os-release ] && awk -F'[= "]' '/PRETTY_NAME/{print $3,$4,$5}' /etc/os-release && return
[ -f /etc/lsb-release ] && awk -F'[="]+' '/DESCRIPTION/{print $2}' /etc/lsb-release && return
}
get_os_info(){
IP=$( ip addr | egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | egrep -v "^192\.168|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-2]\.|^10\.|^127\.|^255\.|^0\." | head -n 1 )
[ -z ${IP} ] && IP=$( wget -qO- -t1 -T2 ipv4.icanhazip.com )
local cname=$( awk -F: '/model name/ {name=$2} END {print name}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//' )
local cores=$( awk -F: '/model name/ {core++} END {print core}' /proc/cpuinfo )
local freq=$( awk -F: '/cpu MHz/ {freq=$2} END {print freq}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//' )
local tram=$( free -m | awk '/Mem/ {print $2}' )
local swap=$( free -m | awk '/Swap/ {print $2}' )
local up=$( awk '{a=$1/86400;b=($1%86400)/3600;c=($1%3600)/60;d=$1%60} {printf("%ddays, %d:%d:%d\n",a,b,c,d)}' /proc/uptime )
local load=$( w | head -1 | awk -F'load average:' '{print $2}' | sed 's/^[ \t]*//;s/[ \t]*$//' )
local opsy=$( get_opsy )
local arch=$( uname -m )
local lbit=$( getconf LONG_BIT )
local host=$( hostname )
local kern=$( uname -r )
echo "########## System Information ##########"
echo
echo "CPU model : ${cname}"
echo "Number of cores : ${cores}"
echo "CPU frequency : ${freq} MHz"
echo "Total amount of ram : ${tram} MB"
echo "Total amount of swap : ${swap} MB"
echo "System uptime : ${up}"
echo "Load average : ${load}"
echo "OS : ${opsy}"
echo "Arch : ${arch} (${lbit} Bit)"
echo "Kernel : ${kern}"
echo "Hostname : ${host}"
echo "IPv4 address : ${IP}"
echo
echo "########################################"
}
check_sys(){
local checkType=$1
local value=$2
local release=''
local systemPackage=''
if [[ -f /etc/redhat-release ]]; then
release="centos"
systemPackage="yum"
elif cat /etc/issue | grep -Eqi "debian"; then
release="debian"
systemPackage="apt"
elif cat /etc/issue | grep -Eqi "ubuntu"; then
release="ubuntu"
systemPackage="apt"
elif cat /etc/issue | grep -Eqi "centos|red hat|redhat"; then
release="centos"
systemPackage="yum"
elif cat /proc/version | grep -Eqi "debian"; then
release="debian"
systemPackage="apt"
elif cat /proc/version | grep -Eqi "ubuntu"; then
release="ubuntu"
systemPackage="apt"
elif cat /proc/version | grep -Eqi "centos|red hat|redhat"; then
release="centos"
systemPackage="yum"
fi
if [[ ${checkType} == "sysRelease" ]]; then
if [ "$value" == "$release" ];then
return 0
else
return 1
fi
elif [[ ${checkType} == "packageManager" ]]; then
if [ "$value" == "$systemPackage" ];then
return 0
else
return 1
fi
fi
}
rand(){
index=0
str=""
for i in {a..z}; do arr[index]=${i}; index=`expr ${index} + 1`; done
for i in {A..Z}; do arr[index]=${i}; index=`expr ${index} + 1`; done
for i in {0..9}; do arr[index]=${i}; index=`expr ${index} + 1`; done
for i in {1..10}; do str="$str${arr[$RANDOM%$index]}"; done
echo ${str}
}
is_64bit(){
if [ `getconf WORD_BIT` = '32' ] && [ `getconf LONG_BIT` = '64' ] ; then
return 0
else
return 1
fi
}
download_file(){
local download_root_url="http://dl.teddysun.com/files"
if [ -s ${1} ]; then
echo "$1 [found]"
else
echo "$1 not found!!!download now..."
if ! wget -c -t3 -T60 ${download_root_url}/${1}; then
echo "Failed to download $1, please download it to ${cur_dir} directory manually and try again."
exit 1
fi
fi
}
versionget(){
if [[ -s /etc/redhat-release ]];then
grep -oE "[0-9.]+" /etc/redhat-release
else
grep -oE "[0-9.]+" /etc/issue
fi
}
centosversion(){
if check_sys sysRelease centos;then
local code=${1}
local version="`versionget`"
local main_ver=${version%%.*}
if [ "${main_ver}" == "${code}" ];then
return 0
else
return 1
fi
else
return 1
fi
}
debianversion(){
if check_sys sysRelease debian;then
local version=$( get_opsy )
local code=${1}
local main_ver=$( echo ${version} | sed 's/[^0-9]//g')
if [ "${main_ver}" == "${code}" ];then
return 0
else
return 1
fi
else
return 1
fi
}
version_check(){
if check_sys packageManager yum; then
if centosversion 5; then
echo "Error: CentOS 5 is not supported, Please re-install OS and try again."
exit 1
fi
fi
}
get_char(){
SAVEDSTTY=`stty -g`
stty -echo
stty cbreak
dd if=/dev/tty bs=1 count=1 2> /dev/null
stty -raw
stty echo
stty $SAVEDSTTY
}
preinstall_l2tp(){
echo
if [ -d "/proc/vz" ]; then
echo -e "\033[41;37m WARNING: \033[0m Your VPS is based on OpenVZ, and IPSec might not be supported by the kernel."
echo "Continue installation? (y/n)"
read -p "(Default: n)" agree
[ -z ${agree} ] && agree="n"
if [ "${agree}" == "n" ]; then
echo
echo "L2TP installation cancelled."
echo
exit 0
fi
fi
echo
echo "Please enter IP-Range:"
read -p "(Default Range: 192.168.18):" iprange
[ -z ${iprange} ] && iprange="192.168.18"
echo "Please enter PSK:"
read -p "(Default PSK: teddysun.com):" mypsk
[ -z ${mypsk} ] && mypsk="teddysun.com"
echo "Please enter Username:"
read -p "(Default Username: teddysun):" username
[ -z ${username} ] && username="teddysun"
password=`rand`
echo "Please enter ${username}'s password:"
read -p "(Default Password: ${password}):" tmppassword
[ ! -z ${tmppassword} ] && password=${tmppassword}
echo
echo "ServerIP:${IP}"
echo "Server Local IP:${iprange}.1"
echo "Client Remote IP Range:${iprange}.2-${iprange}.254"
echo "PSK:${mypsk}"
echo
echo "Press any key to start... or press Ctrl + C to cancel."
char=`get_char`
}
install_l2tp(){
mknod /dev/random c 1 9
if check_sys packageManager apt; then
apt-get -y update
if debianversion 7; then
if is_64bit; then
local libnspr4_filename1="libnspr4_4.10.7-1_amd64.deb"
local libnspr4_filename2="libnspr4-0d_4.10.7-1_amd64.deb"
local libnspr4_filename3="libnspr4-dev_4.10.7-1_amd64.deb"
local libnspr4_filename4="libnspr4-dbg_4.10.7-1_amd64.deb"
local libnss3_filename1="libnss3_3.17.2-1.1_amd64.deb"
local libnss3_filename2="libnss3-1d_3.17.2-1.1_amd64.deb"
local libnss3_filename3="libnss3-tools_3.17.2-1.1_amd64.deb"
local libnss3_filename4="libnss3-dev_3.17.2-1.1_amd64.deb"
local libnss3_filename5="libnss3-dbg_3.17.2-1.1_amd64.deb"
else
local libnspr4_filename1="libnspr4_4.10.7-1_i386.deb"
local libnspr4_filename2="libnspr4-0d_4.10.7-1_i386.deb"
local libnspr4_filename3="libnspr4-dev_4.10.7-1_i386.deb"
local libnspr4_filename4="libnspr4-dbg_4.10.7-1_i386.deb"
local libnss3_filename1="libnss3_3.17.2-1.1_i386.deb"
local libnss3_filename2="libnss3-1d_3.17.2-1.1_i386.deb"
local libnss3_filename3="libnss3-tools_3.17.2-1.1_i386.deb"
local libnss3_filename4="libnss3-dev_3.17.2-1.1_i386.deb"
local libnss3_filename5="libnss3-dbg_3.17.2-1.1_i386.deb"
fi
rm -rf ${cur_dir}/l2tp
mkdir -p ${cur_dir}/l2tp
cd ${cur_dir}/l2tp
download_file "${libnspr4_filename1}"
download_file "${libnspr4_filename2}"
download_file "${libnspr4_filename3}"
download_file "${libnspr4_filename4}"
download_file "${libnss3_filename1}"
download_file "${libnss3_filename2}"
download_file "${libnss3_filename3}"
download_file "${libnss3_filename4}"
download_file "${libnss3_filename5}"
dpkg -i ${libnspr4_filename1} ${libnspr4_filename2} ${libnspr4_filename3} ${libnspr4_filename4}
dpkg -i ${libnss3_filename1} ${libnss3_filename2} ${libnss3_filename3} ${libnss3_filename4} ${libnss3_filename5}
apt-get -y install wget gcc ppp flex bison make pkg-config libpam0g-dev libcap-ng-dev iptables \
libcap-ng-utils libunbound-dev libevent-dev libcurl4-nss-dev libsystemd-daemon-dev
else
apt-get -y install wget gcc ppp flex bison make python libnss3-dev libnss3-tools libselinux-dev iptables \
libnspr4-dev pkg-config libpam0g-dev libcap-ng-dev libcap-ng-utils libunbound-dev \
libevent-dev libcurl4-nss-dev libsystemd-dev
fi
apt-get -y --no-install-recommends install xmlto
apt-get -y install xl2tpd
compile_install
elif check_sys packageManager yum; then
echo "Adding the EPEL repository..."
yum -y install epel-release yum-utils
[ ! -f /etc/yum.repos.d/epel.repo ] && echo "Install EPEL repository failed, please check it." && exit 1
yum-config-manager --enable epel
echo "Adding the EPEL repository complete..."
if centosversion 7; then
yum -y install ppp libreswan xl2tpd firewalld
yum_install
elif centosversion 6; then
yum -y remove libevent-devel
yum -y install libevent2-devel
yum -y install nss-devel nspr-devel pkgconfig pam-devel \
libcap-ng-devel libselinux-devel lsof \
curl-devel flex bison gcc ppp make iptables gmp-devel \
fipscheck-devel unbound-devel xmlto libpcap-devel xl2tpd
compile_install
fi
fi
}
config_install(){
cat > /etc/ipsec.conf<<EOF
version 2.0
config setup
protostack=netkey
nhelpers=0
uniqueids=no
interfaces=%defaultroute
virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12,%v4:!${iprange}.0/24
conn l2tp-psk
rightsubnet=vhost:%priv
also=l2tp-psk-nonat
conn l2tp-psk-nonat
authby=secret
pfs=no
auto=add
keyingtries=3
rekey=no
ikelifetime=8h
keylife=1h
type=transport
left=%defaultroute
leftid=${IP}
leftprotoport=17/1701
right=%any
rightprotoport=17/%any
dpddelay=40
dpdtimeout=130
dpdaction=clear
sha2-truncbug=yes
EOF
cat > /etc/ipsec.secrets<<EOF
%any %any : PSK "${mypsk}"
EOF
cat > /etc/xl2tpd/xl2tpd.conf<<EOF
[global]
port = 1701
[lns default]
ip range = ${iprange}.2-${iprange}.254
local ip = ${iprange}.1
require chap = yes
refuse pap = yes
require authentication = yes
name = l2tpd
ppp debug = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes
EOF
cat > /etc/ppp/options.xl2tpd<<EOF
ipcp-accept-local
ipcp-accept-remote
require-mschap-v2
ms-dns 8.8.8.8
ms-dns 8.8.4.4
noccp
auth
hide-password
idle 1800
mtu 1410
mru 1410
nodefaultroute
debug
proxyarp
connect-delay 5000
EOF
rm -f /etc/ppp/chap-secrets
cat > /etc/ppp/chap-secrets<<EOF
# Secrets for authentication using CHAP
# client server secret IP addresses
${username} l2tpd ${password} *
EOF
}
compile_install(){
rm -rf ${cur_dir}/l2tp
mkdir -p ${cur_dir}/l2tp
cd ${cur_dir}/l2tp
download_file "${libreswan_filename}.tar.gz"
tar -zxf ${libreswan_filename}.tar.gz
cd ${cur_dir}/l2tp/${libreswan_filename}
echo "WERROR_CFLAGS =" > Makefile.inc.local
make programs && make install
/usr/local/sbin/ipsec --version >/dev/null 2>&1
if [ $? -ne 0 ]; then
echo "${libreswan_filename} install failed."
exit 1
fi
config_install
cp -pf /etc/sysctl.conf /etc/sysctl.conf.bak
sed -i 's/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/g' /etc/sysctl.conf
for each in `ls /proc/sys/net/ipv4/conf/`; do
echo "net.ipv4.conf.${each}.accept_source_route=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.accept_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.send_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.rp_filter=0" >> /etc/sysctl.conf
done
sysctl -p
if centosversion 6; then
[ -f /etc/sysconfig/iptables ] && cp -pf /etc/sysconfig/iptables /etc/sysconfig/iptables.old.`date +%Y%m%d`
if [ "`iptables -L -n | grep -c '\-\-'`" == "0" ]; then
cat > /etc/sysconfig/iptables <<EOF
# Added by L2TP VPN script
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp --dport 22 -j ACCEPT
-A INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s ${iprange}.0/24 -j ACCEPT
COMMIT
*nat
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
COMMIT
EOF
else
iptables -I INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD -s ${iprange}.0/24 -j ACCEPT
iptables -t nat -A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
/etc/init.d/iptables save
fi
if [ ! -f /etc/ipsec.d/cert9.db ]; then
echo > /var/tmp/libreswan-nss-pwd
certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d
rm -f /var/tmp/libreswan-nss-pwd
fi
chkconfig --add iptables
chkconfig iptables on
chkconfig --add ipsec
chkconfig ipsec on
chkconfig --add xl2tpd
chkconfig xl2tpd on
/etc/init.d/iptables restart
/etc/init.d/ipsec start
/etc/init.d/xl2tpd start
else
[ -f /etc/iptables.rules ] && cp -pf /etc/iptables.rules /etc/iptables.rules.old.`date +%Y%m%d`
if [ "`iptables -L -n | grep -c '\-\-'`" == "0" ]; then
cat > /etc/iptables.rules <<EOF
# Added by L2TP VPN script
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp --dport 22 -j ACCEPT
-A INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s ${iprange}.0/24 -j ACCEPT
COMMIT
*nat
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
COMMIT
EOF
else
iptables -I INPUT -p udp -m multiport --dports 500,4500,1701 -j ACCEPT
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD -s ${iprange}.0/24 -j ACCEPT
iptables -t nat -A POSTROUTING -s ${iprange}.0/24 -j SNAT --to-source ${IP}
/sbin/iptables-save > /etc/iptables.rules
fi
cat > /etc/network/if-up.d/iptables <<EOF
#!/bin/sh
/sbin/iptables-restore < /etc/iptables.rules
EOF
chmod +x /etc/network/if-up.d/iptables
if [ ! -f /etc/ipsec.d/cert9.db ]; then
echo > /var/tmp/libreswan-nss-pwd
certutil -N -f /var/tmp/libreswan-nss-pwd -d /etc/ipsec.d
rm -f /var/tmp/libreswan-nss-pwd
fi
update-rc.d -f xl2tpd defaults
cp -f /etc/rc.local /etc/rc.local.old.`date +%Y%m%d`
sed --follow-symlinks -i -e '/^exit 0/d' /etc/rc.local
cat >> /etc/rc.local <<EOF
# Added by L2TP VPN script
echo 1 > /proc/sys/net/ipv4/ip_forward
/usr/sbin/service ipsec start
exit 0
EOF
chmod +x /etc/rc.local
echo 1 > /proc/sys/net/ipv4/ip_forward
/sbin/iptables-restore < /etc/iptables.rules
/usr/sbin/service ipsec start
/usr/sbin/service xl2tpd restart
fi
}
yum_install(){
config_install
cp -pf /etc/sysctl.conf /etc/sysctl.conf.bak
echo "# Added by L2TP VPN" >> /etc/sysctl.conf
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
echo "net.ipv4.tcp_syncookies=1" >> /etc/sysctl.conf
echo "net.ipv4.icmp_echo_ignore_broadcasts=1" >> /etc/sysctl.conf
echo "net.ipv4.icmp_ignore_bogus_error_responses=1" >> /etc/sysctl.conf
for each in `ls /proc/sys/net/ipv4/conf/`; do
echo "net.ipv4.conf.${each}.accept_source_route=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.accept_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.send_redirects=0" >> /etc/sysctl.conf
echo "net.ipv4.conf.${each}.rp_filter=0" >> /etc/sysctl.conf
done
sysctl -p
cat > /etc/firewalld/services/xl2tpd.xml<<EOF
<?xml version="1.0" encoding="utf-8"?>
<service>
<short>xl2tpd</short>
<description>L2TP IPSec</description>
<port protocol="udp" port="4500"/>
<port protocol="udp" port="1701"/>
</service>
EOF
chmod 640 /etc/firewalld/services/xl2tpd.xml
systemctl enable ipsec
systemctl enable xl2tpd
systemctl enable firewalld
systemctl status firewalld > /dev/null 2>&1
if [ $? -eq 0 ]; then
firewall-cmd --reload
echo "Checking firewalld status..."
firewall-cmd --list-all
echo "add firewalld rules..."
firewall-cmd --permanent --add-service=ipsec
firewall-cmd --permanent --add-service=xl2tpd
firewall-cmd --permanent --add-masquerade
firewall-cmd --reload
else
echo "Firewalld looks like not running, trying to start..."
systemctl start firewalld
if [ $? -eq 0 ]; then
echo "Firewalld start successfully..."
firewall-cmd --reload
echo "Checking firewalld status..."
firewall-cmd --list-all
echo "adding firewalld rules..."
firewall-cmd --permanent --add-service=ipsec
firewall-cmd --permanent --add-service=xl2tpd
firewall-cmd --permanent --add-masquerade
firewall-cmd --reload
else
echo "Failed to start firewalld. please enable udp port 500 4500 1701 manually if necessary."
fi
fi
systemctl restart ipsec
systemctl restart xl2tpd
echo "Checking ipsec status..."
systemctl -a | grep ipsec
echo "Checking xl2tpd status..."
systemctl -a | grep xl2tpd
echo "Checking firewalld status..."
firewall-cmd --list-all
}
finally(){
cd ${cur_dir}
rm -fr ${cur_dir}/l2tp
# create l2tp command
cp -f ${cur_dir}/`basename $0` /usr/bin/l2tp
echo "Please wait a moment..."
sleep 5
ipsec verify
echo
echo "###############################################################"
echo "# L2TP VPN Auto Installer #"
echo "# System Supported: CentOS 6+ / Debian 7+ / Ubuntu 12+ #"
echo "# Intro: https://teddysun.com/448.html #"
echo "# Author: Teddysun <i@teddysun.com> #"
echo "###############################################################"
echo "If there is no [FAILED] above, you can connect to your L2TP "
echo "VPN Server with the default Username/Password is below:"
echo
echo "Server IP: ${IP}"
echo "PSK : ${mypsk}"
echo "Username : ${username}"
echo "Password : ${password}"
echo
echo "If you want to modify user settings, please use below command(s):"
echo "l2tp -a (Add a user)"
echo "l2tp -d (Delete a user)"
echo "l2tp -l (List all users)"
echo "l2tp -m (Modify a user password)"
echo
echo "Welcome to visit our website: https://teddysun.com/448.html"
echo "Enjoy it!"
echo
}
l2tp(){
clear
echo
echo "###############################################################"
echo "# L2TP VPN Auto Installer #"
echo "# System Supported: CentOS 6+ / Debian 7+ / Ubuntu 12+ #"
echo "# Intro: https://teddysun.com/448.html #"
echo "# Author: Teddysun <i@teddysun.com> #"
echo "###############################################################"
echo
rootness
tunavailable
disable_selinux
version_check
get_os_info
preinstall_l2tp
install_l2tp
finally
}
list_users(){
if [ ! -f /etc/ppp/chap-secrets ];then
echo "Error: /etc/ppp/chap-secrets file not found."
exit 1
fi
local line="+-------------------------------------------+\n"
local string=%20s
printf "${line}|${string} |${string} |\n${line}" Username Password
grep -v "^#" /etc/ppp/chap-secrets | awk '{printf "|'${string}' |'${string}' |\n", $1,$3}'
printf ${line}
}
add_user(){
while :
do
read -p "Please input your Username:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets > /dev/null 2>&1
if [ $? -eq 0 ];then
echo "Username (${user}) already exists. Please re-enter your username."
else
break
fi
fi
done
pass=`rand`
echo "Please input ${user}'s password:"
read -p "(Default Password: ${pass}):" tmppass
[ ! -z ${tmppass} ] && pass=${tmppass}
echo "${user} l2tpd ${pass} *" >> /etc/ppp/chap-secrets
echo "Username (${user}) add completed."
}
del_user(){
while :
do
read -p "Please input Username you want to delete it:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets >/dev/null 2>&1
if [ $? -eq 0 ];then
break
else
echo "Username (${user}) is not exists. Please re-enter your username."
fi
fi
done
sed -i "/^\<${user}\>/d" /etc/ppp/chap-secrets
echo "Username (${user}) delete completed."
}
mod_user(){
while :
do
read -p "Please input Username you want to change password:" user
if [ -z ${user} ]; then
echo "Username can not be empty"
else
grep -w "${user}" /etc/ppp/chap-secrets >/dev/null 2>&1
if [ $? -eq 0 ];then
break
else
echo "Username (${user}) is not exists. Please re-enter your username."
fi
fi
done
pass=`rand`
echo "Please input ${user}'s new password:"
read -p "(Default Password: ${pass}):" tmppass
[ ! -z ${tmppass} ] && pass=${tmppass}
sed -i "/^\<${user}\>/d" /etc/ppp/chap-secrets
echo "${user} l2tpd ${pass} *" >> /etc/ppp/chap-secrets
echo "Username ${user}'s password has been changed."
}
# Main process
action=$1
if [ -z ${action} ] && [ "`basename $0`" != "l2tp" ]; then
action=install
fi
case ${action} in
install)
l2tp 2>&1 | tee ${cur_dir}/l2tp.log
;;
-l|--list)
list_users
;;
-a|--add)
add_user
;;
-d|--del)
del_user
;;
-m|--mod)
mod_user
;;
-h|--help)
echo "Usage: `basename $0` -l,--list List all users"
echo " `basename $0` -a,--add Add a user"
echo " `basename $0` -d,--del Delete a user"
echo " `basename $0` -m,--mod Modify a user password"
echo " `basename $0` -h,--help Print this help information"
;;
*)
echo "Usage: `basename $0` [-l,--list|-a,--add|-d,--del|-m,--mod|-h,--help]" && exit
;;
esac