How to Create a Linux-based VPN Server in 30 minutes

The following section describes how to create a Linux-based VPN Server-Linux Enterprise Application-Linux server application in 30 minutes. VPN (Virtual Private Network) is an extension of a Private Network. It can simulate a point-to-point Private connection through a shared Internet or public Network connection, send data between a local computer and a remote computer.

It has good confidentiality and is not subject to authorization, so that both parties can establish a free and secure point-to-point connection. The following describes how to quickly build a VPN Server.

Install software

1. Install PPP

Install PPP (Point-to-Point Protocol, Point-to-Point Protocol) 2.4.2 or later versions, can you go to the http://sourceforge.net/project/showfiles.php? Group_id = 44827 download the ppp-2.4.3-0.cvs_20040527.1.i386.rpm package.

The installation command is as follows:


# Rpm-Uvh ppp-2.4.3-0.cvs_20040527.1.i386.rpm




2. Install kernel MPPE patch

Install the kernel MPPE (Microsoft Point to Point Encryption, Microsoft Point-to-Point Encryption) patch and select the appropriate version based on the kernel. The Linux kernel I use is 2.4.20-31.9, you can go to http://pptpclient.sourceforge.ne... 4.20-31.9.i686.rpm to download the corresponding kernel-mppe-2.4.20-31.9.i686.rpm package. The installation command is as follows:


# Rpm-ivh kernel-mppe-2.4.20-31.9.i686.rpm




Run the following command to check whether the kernel MPPE patch is successfully installed:


# Modprobe ppp-compress-18




3. Check whether PPP supports MPPE.

Run the following command to check whether PPP supports MPPE:


# Strings '/usr/sbin/pppd' | grep-I mppe | wc -- lines




If the above command output is "0", it means not supported; If the output is "30" or a larger number, it means support.

4. Install PPTPD

To http://sourceforge.net/project/showfiles.php? Group_id = 44827 download the pptpd-1.1.4-b4.i386.rpm package and install it.


# Rpm-ivh pptpd-1.1.4-b4.i386.rpm