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OpenVPN is a full-featured SSL VPN which implements OSI layer 2 or 3 secure network extension using the industry standard SSL/TLS protocol, supports flexible client authentication methods based on certificates, smart cards, and/or username/password credentials, and allows user or group-specific access control policies using firewall rules applied to the VPN virtual interface. OpenVPN is not a web application proxy and does not operate through a web browser.
OpenVPN supports different platforms including Linux, Free BSD, Net BSD, Open BSD, Mac OS X Darwin, Windows, Solaris.
How to install OpenVPN on Redhat/Fedora/Suse/CentOS
Open your terminal in root user mode and resolve the dependencies. The dependencies are openssl, lzo and pam. So install the dependencies first and then install OpenVPN.
# yum install openssl lzo pam
Download the openvpn to the ~/Downloads directory
#cd ~/Downloads # rpm -ivh openvpn.xxx.rpm
If you want to upgrade an existing installation use
# rpm -Uvh openvpn.xxx.rpm
Note : Replace xxx with appropriate version you have download.
How to install OpenVPN on Ubuntu/Debian and other debian based distributions
Open the terminal and login as root user.
Download the OpenVPN to ~/Downloads directory
#cd ~/Downloads # dpkg -i openvpn.xxx.deb
Note : Replace xxx with appropriate version you have download
Or try to use apt-get
# apt-get install openvpn
How to install OpenVPN from source code
Install the library files for the source code compilation.
In case of debian based distribution
#apt-get install gcc build-essential openssl lzo pam
In case of rpm based distribution
#yum install gcc build-essential openssl lzo pam
Download the OpenVPN source code and extract it.
# tar -xzvf openvpn-xxx.tar.gz # cd openvpn-xxx #./configure
Options for ./configure ( optional )
--enable-pthread Compile pthread support for
improved latency during SSL/TLS key
negotiations (Linux or Solaris only)
--disable-lzo Do not compile LZO compression support
--disable-crypto Do not compile OpenSSL crypto support
--disable-ssl Do not compile OpenSSL SSL support for
TLS-based key exchange
--with-ssl-headers=DIR Crypto/SSL Include files location
--with-ssl-lib=DIR Crypto/SSL Library location
--with-lzo-headers=DIR LZO Include files location
--with-lzo-lib=DIR LZO Library location
--with-ifconfig-path=PATH Path to ifconfig tool (only need to
specify if in a non-standard location)
--with-leak-check=TYPE Build with memory leak checking
TYPE = dmalloc or ssl
--enable-strict Enable strict compiler warnings
--enable-strict-options Enable strict options check between peers
#make #make install
How to run OpenVPN
In terminal openvpn vpnfile.ovpn
Note: vpnfile.ovpn is your configuration file
OpenVPN has now been started and you can start to use it.
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