How to Build Open. VPN Server on Cent. OS 6. x Install, Setup, ConfigHow to Install, Setup, Config Open. VPN on Cent. OS 6. In this page I write full tutorial to guide you installing Open. VPN on Cent. OS 6. I will try all the steps to be as clear as possible. Do not hesitate to ask if you have any question. Previously How to install PPTP on Cent. OS 6. x the easiest way. Install Xen Tools Centos Download' title='Install Xen Tools Centos Download' />What you need A VPS or Dedicated server running Cent. OS 6. x. Proper knowledge to use Putty, SSH and common Unix command. Only for VPS based on Open. VZ virtualization other skip this please enable TUNTAP options in your VPS control panel e. SeafileDropboxmega. Seafile. New Features in Version 11. Features and enhancements in this release are listed here, with a link to full documentation for the feature. To see the new features in. A webbased interface for system administration for Unix. Setup user accounts, DNS, file sharing and the program is freeware. Solus. VM. Open. VZ VPS users only How to Install Open. VPN to Build Cent. OS VPN server. Prerequisite. Step 0 Login to your server via SSH. You better login as root. Step 1 Now issue this first command syntax yum install gcc make rpm build autoconf. Step 2 Now download LZO RPM and Configure RPMForge Repo. Use wget command wget http openvpn. Step 3 Now add correct repo for your server Cent. OS 6 3. 2 bit x. Cent. OS 6 6. 4 bit x. How to know which one is your server Issue this command uname a. If you see x. 866. GNULinux at the end of the output line means your server is 6. Otherwise if you see i. GNULinux or x. GNULinux means your machine is 3. Step 4 Then build the rpm package using this command rpmbuild rebuild lzo 1. Uvh lzo. rpm. rpm Uvh rpmforge releaseit enter for each line above. Installing Open. VPNStep 5 Issue the special yum command yum install openvpn yscreenshot. Step 6 Copy the easy rsa folder to etcopenvpn, use this command cp R usrsharedocopenvpn 2. Step 7 Now edit it nano etcopenvpneasy rsa2. Edit this line export KEYCONFIGEASYRSAwhichopensslcnf EASYRSAreplace it with export KEYCONFIGetcopenvpneasy rsa2. ControlO to save then ControlX to exit. Step 8 Create the certificate using these commands cd etcopenvpneasy rsa2. Step 9 Its time to build necessary CA file. Hint. Country Name may be filled or press enter. State or Province Name may be filled or press enter. City may be filled or press enter. Org Name may be filled or press enter. Org Unit Name may be filled or press enter. Common Name your server hostname. Email Address may be filled or press enter. Step 1. 0 Time to build Key Server. Hint Almost the same with. Common Name server. A challenge password leave. Optional company name fill or entersign the certificate y. You can simply leave them blank. The only 2 required are sign the certificate choose y and 1 out of 1 certificate requests choose yStep 1. Now issue command below to build Diffie Hellman. Step 1. Create Open. VPN config file nano etcopenvpnserver. Step 1. 3 Now enter this value in that config file port 1. Comment this line if you are using Free. RADIUS. plugin etcopenvpnradiusplugin. Uncomment this line if you are using Free. RADIUS. client cert not required. DNS 8. 8. 8. 8. push dhcp option DNS 8. Save it once done. ControlO then ControlXStep 1. Lets start Open. VPN service on your server for the very first time service openvpn startpic Step 1. Youll also need to enable IP forwarding in the file etcsysctl. Open it and edit net. Hit ControlO to save then ControlX to exit nano. Step 1. 6 Issue this command to load the change sysctl p. Step 1. 7 Create new Linux username which can also be used to login to the VPN useradd username s binfalsereplace username with your own username. Then also create its password passwd usernamepic Step 1. Now route some iptables. Xen and KVM users use iptables t nat A POSTROUTING s 1. MASQUERADEspecial for Open. VZ use these two instead iptables t nat A POSTROUTING o venet. SNAT to source 1. A POSTROUTING s 1. SNAT to source 1. Do not forget to replace 1. IP. Pic Step 1. 9 Note if you have CSF on the same server you need to open your Open. VPN port Usually 1. CSF iptables A FORWARD m state state RELATED,ESTABLISHED j ACCEPT. A FORWARD s 1. 0. ACCEPT. iptables A FORWARD j REJECT. A POSTROUTING s 1. MASQUERADE. iptables t nat A POSTROUTING j SNAT to source 1. Step 2. 0 Now save that iptables rules service iptables save. Step 2. 1 Finally lets create a server. To make it easy, you can simply create it on your local computer using Notepad or any other simple text editor tool. Enter following in that file client. The Fairy Tales Of The Brothers Grimm Red Riding Hood Movie. Your server IP and Open. VPN Port. resolv retry infinite. Then save it with. Save that file in the config directory of where you installed Open. VPN client in your computer. See screenshot Step 2. Thats it. Now you can copy ca. Now you can download the ca. Thats it. Now you can login to your VPN using username and password youve created. ENJOY. Also Read Get caught using this common VPN connection I wrote another tutorial how to build Scrambled undetected version of Open. VPN server, also on Cent.