CentOS 7 installation and configuration PPTP

Date: 2019-06-13undefined Category: V** series undefined Title: CentOS 7 installation and configuration PPTPundefined Source: [Reproduced, minor corrections] (http://blog.topspeedsnail.com/archives/8492)

Installation check###

Check if the system supports PPTP V** before installation

modprobe ppp-compress-18&& echo success

It should output "success", if it is not supported, try to install:

yum install kernel-devel

Whether to enable TUN/TAP:

cat /dev/net/tun

Should output:

cat:/dev/net/tun: File descriptor in bad state

Whether to open ppp:

cat /dev/ppp

Should output:

cat:/dev/ppp: No such device or address

Ensure that the above 3 conditions are met. If they are not met, it means that PPTP V** cannot be installed.

installation steps###

1. pptpd in epel warehouse, first install epel warehouse:

yum install epel-release

2. Install the required packages:

yum install ppp pptpd net-tools iptables-services -y

3. Configure pptpd

/etc/pptpd.conf

option /etc/ppp/options.pptpd
logwtmp
localip 10.0.10.1  #Set the IP address of the pptp virtual network card interface (note: not the public IP of the server)
remoteip 10.0.10.2-254 #V for dial-in**IP address pool dynamically allocated by users

/etc/ppp/options.pptpd

name pptpd
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
require-mppe-128
ms-dns 114.114.114.114
ms-dns 8.8.4.4
proxyarp
lock
nobsdcomp 
novj
novjccomp
nologfd

/etc/ppp/chap-secrets user and password

# Secrets for authentication using CHAP
# client	server	secret			IP addresses
user_test1       pptpd   123456*
user_test2       pptpd   123456*

4. Turn on IP forwarding#####

echo net.ipv4.ip_forward =1>>/etc/sysctl.conf
sysctl -p   #to validate

5. Configure firewall

systemctl stop firewalld
systemctl disable firewalld  #If using firewallid
service iptables save
service iptables stop
chkconfig iptables off
iptables -F
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Add boot

echo "iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE">>/etc/rc.d/rc.local
chmod +x /etc/rc.d/rc.local

6. Start and join boot

service pptpd restart
chkconfig pptpd on

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