Squid Proxy Server Configuration In Centos 7 Step By Step Pdf

Try to send a mail to someone else on the same server, if this works, then send to a remote site. ICTFAX Step by Step Installation. 6 ” Joshua Geake juni 10, 2011 om 9:10 pm. Testing the Configuration; 7. lk http://www. How to Install Varnish on CentOS 7 or RHEL 7 its dns is pointing to the IP address of the server. When using proxy server, my computer sends the requests to the proxy server, the requests are being processed and I am being delivered the content I was looking form. Load Balancing Satellite Proxy Servers. The ip address of the server is 192. Squid will, in the beginning, become an intermediary, simply transferring the client's get to the server and keeping a duplicate of the wanted subject. zip to C:\ This will create the c:\squid folder. Don’t panic!!! this is something that can be fixed in a few steps. 15 Hostname : dev2. It also can work as web filtering and can control the browsing traffic. Hosting the file: Put it on a web server where the client browser can access it. I had similar headaches myself installing CentOS 5. To configure Squid, adjust the directives in the configuration file. These instructions are intended specifically for installing Squid on a single CentOS 7 node. Install Gnome GUI on CentOS 7 – License Agreement. gabrielcanepa. 7 (CentOS release 6. even I've watched videos on youtube and followed them step by step but still I am unable to configure it as transparent proxy server why?????. 04 / Ubuntu 16. com/profile/01801666391162879995 [email protected] Please follow below steps to configure your squid proxy server. 1 Installation, 2 Configuration, 3 Accessing services on local hostnames, 4 Starting, 5 Content Filtering 9 Transparent web proxy. To check your proxy server, open Firefox browser. This guide assumes you have a basic understanding of your Ubuntu system. Installing and configuring Squid proxy server Ástþór IP. Installing the TIS Proxy server • 10. Squid as a reverse proxy 03 May 2014 on squid. without problems with lastest Internet Explorer, Mozilla Firefox and. Squid Proxy is released under the GNU General Public License. 6 release date is 25 Jun 2014. System requirements 4. This guide will walk you through setting up a Red Hat Enterprise Linux 6. d directory. This article explains the steps to install squid proxy in Windows server. To setup Squid on different port, Edit squid configuration file and change http_port value with new port. 7 | LinuxHelp | Squid is a high performance FTP and HTTP proxy server that facilitates data storage from the frequently used files and web pages. Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. I will walk you through the steps of setting up a Squid proxy server through the Webmin tool. Squid Proxy Server Configuration In Linux Step By Step Ubuntu About Squid Proxy Squid Proxy is a a great proxy server mainly used for caching will learn how to install and setup Squid Proxy on Ubuntu and Debian Linux distributions. ICTFAX Step by Step Installation. The VMs are interconnected via a VMware NAT virtual network. 0 (5,00/5) Update KB4011086 sets Outlook 2007 language to Swedish (5,00/5) iptables and dynamic DNS – part 3 (5,00/5) Lovelock: Mozilla as default browser from Thunderbird (5,00/5) iptables and dynamic DNS (5,00/5) X11 forwarding request failed on channel 0 (5,00/5) Backup your CMOS from. To uninstall squid you may need to log in as root user or use su command, then execute yum remove squid command as show on example below. So with much disgust, we must open up the squid. Cache+: lost: Cache+ is a squid-cache based product and SQL Based squid reporting. The answer is what is known as a reverse proxy. Squid is a full-featured web proxy cache server application which provides proxy and cache services for Hyper Text Transport Protocol (HTTP), File Transfer Protocol (FTP), and other popular network protocols. squidGuard segmentation fault with squidGuard on Centos 7 Hello, I'm following the Linux Foundation Certified Systems Engineer course and am doing the HTTP services section, squid proxy. So This is how we can configure YUM Repository Package Manager in RHEL 7/ CentOS 7. Testing the Configuration; 7. This document describes how to manually install Nagios Log Server from source on a clean system. and restart squid proxy server by. Upgrading a Red Hat Proxy. how to install apache web server, setting up a apache http web server, how to set up a apache http web server, how to configure apache web server in linux step by step, how to configure apache web server in centos, how to configure apache web server in ubuntu, apache web server We have more articles to be updated soon. If you found this article useful then Like Us, Subscribe our News Letter, Or if you have any thing to say then feel free to comment on comment box below. Setup Caching-Only DNS Server Using "Bind" in CentOS 6. This howto will show you the steps to install and configure a Squid 3 Proxy Server on CentOS6. ↳ CentOS 4 - Server Support ↳ CentOS 4 - Security Support ↳ CentOS 4 - Webhosting Support ↳ CentOS 4 - X86_64,s390(x) and PowerPC Support ↳ CentOS 4 - Oracle Installation and Support ↳ CentOS 4 - Miscellaneous Questions ↳ CentOS 5 ↳ CentOS 5 - FAQ & Readme First ↳ CentOS 5 - General Support. Clients make requests to the proxy which communicates with external sites, then send the response back to the client. Cisco WCCP Squid Transparent Proxy. Placing Squid in front of a web server can greatly improve the server performance by caching repeated requests, filtering web traffic and accessing geo-restricted content. wide range of network services, such as DNS, DHCP, Web, proxy, and authenti- We provide HTML and PDF versions of our books in. Using reverse proxy allows for multiple advantages such as improved performance, load balancing, transparent server maintenance of servers behind the reverse proxy server, improved security and more. Configuring Squid. Download ubuntu and Centos linux server administration or any other file from Books category. Execute below command on your. Here My Server IP is 192. 2016-09-13. The router is called the WCCP server and the proxy is called the WCCP client. It can be used for multiple purpose like caching, web filtering and else. Then finally you will get the desktop. Installing a Transparent SQUID proxy 10. 7, Windows Operating System was supportive. 2 and later the Unix/Linux helper is called negotiate_kerberos_auth. In part 5, I install Squid on the CentOS server and configure it to be a transparent proxy. In this guide, we will cover how to install and configure Squid proxy server on Ubuntu 18. 3 i had to reinstall squid to make it work probably. Configuring Proxy server in Linux (CentOS / Red Hat) First, Update yum repositories and packages by typing the below command: [[email protected] ~]# yum update. Clients make requests to the proxy which communicates with external sites, then send the response back to the client. Third line specifies allowing of this backend sites_server_1) to squid server (server_1). if the squid installation process is complete, the next step is a configuration file squid. Forward all squid traffic to port 80 on an IPv6 IP. Setting up client browser for suing the PAC file to get and use proxy configuration. I got a chance to configure the Squid transparent proxy and my task is simple to setup Squid proxy as transparent server. Just hit the these commands-. Installing the TIS Proxy server • 10. Make sure squid3 is installed correctly on ubuntu server, you can found tutorial squid3 the installation here. Installing Nginx. Step 5: Client Side DNS Setup. Click the Manual proxy configuration button. Install proxy server; Configure the proxy server; Configure basic proxy authentication. This howto will show you the steps to install and configure a Squid 3 Proxy Server on CentOS6. And hope this will help you alot. Before we proceed any further, you might be asking yourself what exactly is Squid? It is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and many more. So, before we start. In this chapter, we are going to learn about the different ways of running Squid and the available options that can be passed to Squid from the command line. What is a proxy server?. Check the box that says ‘Use this proxy server for all protocols’. Hi all, I have set up numerous squid boxes before (that actually module by refreshing all modules in the Webmin Configuration menu. proxy server requires authentication like follows, then input. Installing and configuring Squid proxy server Ástþór IP. Setup Caching-Only DNS Server Using "Bind" in CentOS 6. Setting up a reverse web proxy is a straight forward process that entails (1) installing a web server, (2) configuring it to act as a reverse web proxy to the auto deploy server, (3) modifying the TFTP configuration and (4) editing the DHCP configuration to distribute the ESXi host workload. This how-to explains how to install the current version of Squid Proxy on a CentOS 7 VM with Webmin, Apache, and SARG with update support. Follow the given below steps in Squid Server to block websites which are listed in file. 2 and later the Unix/Linux helper is called negotiate_kerberos_auth. mswin_negotiate_auth. 4 given below. And write website name in the file which you want to block. Squid - Proxy Server. 4 Get link; 2 step. How Squid ACLs work # web applications running on the proxy server who think the only Pls find the squid. The following step will show how to install Oracle VirtualBox on linux CentOS 6 or CentOS 7. 0 router secure slave squid ssh ssl ubuntu user web server. Simply there is no configuration at client side. The web proxy in ClearOS is a high-performance proxy caching server for web clients, supporting HTTP, FTP and some lesser known protocols. Joining a Linux server to a Windows domain. Now open the web browser and set the port number and ip address of proxy server in connection tab If you can successful retrieve website mean squid is working correctly Now try to open www. For basics of how Proxy Servers work, check our guide on What are proxy servers and Types of Proxy Servers. Proxy configuration The Scanner includes Proxy support with or without authentication - Basic or NTLM. 6) Edit the Squid configuration file gedit /etc/squid/squid. Installing & Configuring Linux Webmin - Linux Web-Based Administration. 1 Installation, 2 Configuration, 3 Accessing services on local hostnames, 4 Starting, 5 Content Filtering 9 Transparent web proxy. The simple reason. ↳ CentOS 4 - Server Support ↳ CentOS 4 - Security Support ↳ CentOS 4 - Webhosting Support ↳ CentOS 4 - X86_64,s390(x) and PowerPC Support ↳ CentOS 4 - Oracle Installation and Support ↳ CentOS 4 - Miscellaneous Questions ↳ CentOS 5 ↳ CentOS 5 - FAQ & Readme First ↳ CentOS 5 - General Support. In the Cisco DNA Spaces: Connector CLI, verify whether a connection can be established to dms. 1 Setting up the Proxy Server • 11. Clients make requests to the proxy which communicates with external sites, then send the response back to the client. Just follow each step of this guide carefully and everything will be ok. In this Tutorial we are going to configure the master and slave LDAP Server on RHEL / CentOS / Scientific Linux / Oracle Linux 6 /5 with step by step instructions. The command example below show step by step how to uninstall squid proxy server on CentOS system using yum remove command. ICTFAX Step by Step Installation. All text and image content on rabbitvcs. 7 on Centos 6. conf , which contains recommended minimum configuration. Using the Windows PE tools and a Windows 10 image file, you can install Windows 10 from the network. It is a widely used proxy server. For Squid-2. Squid client configuration On client set the ip configuration. To configure Oracle Configuration Manager to use a proxy server, enter the following details. x as Transparent Proxy on CentOS 7 / RHEL 7 There are several benefits of using a transparent proxy. STABLE21 Jan 17, 2011 I would like to ask some help and tutorial for setting up and how to configure squid proxy server in my (Home PC Server). You can see in our nginx. We will now, in this tutorial, learn to configure Squid transparent proxy server. Make sure squid3 is installed correctly on ubuntu server, you can found tutorial squid3 the installation here. zip to C:\ This will create the c:\squid folder. how to install squid proxy on centos 7. Step 6: Go to your secondary DNS server manager and expand the machine name. Configure two node Squid (Proxy Server) Clustering using Pacemaker on CentOS 7 / RHEL 7 by Pradeep Kumar · Published March 27, 2019 · Updated March 27, 2019 As we all know that squid is a caching proxy server which supports the protocols like HTTP, HTTPS, FTP and more. How do I install Squid Proxy server on CentOS 5 Liinux server? Sure Squid server is a popular open source GPLd proxy and web cache. Squid is a full-featured web proxy cache server application which provides proxy and cache services for Hyper Text Transport Protocol (HTTP), File Transfer Protocol (FTP), and other popular network protocols. Enter the port number of the proxy server. I was using an old netbook that was hard wired to my router for the Squid server but only for LAN. Configure two node Squid (Proxy Server) Clustering using Pacemaker on CentOS 7 / RHEL 7 by Pradeep Kumar · Published March 27, 2019 · Updated March 27, 2019 As we all know that squid is a caching proxy server which supports the protocols like HTTP, HTTPS, FTP and more. Forward & Reverse Apache Proxy - CentOS 7 August 28, 2014, 14:30 20 Comments There are two possible configurations for Apache Proxy Server and we will present installation and configuration of both types this how to. 0 Configuration Manual (ViSolve) PDF Icon. Hope that from the previous post, you've gain some basic knowledge about the proxy server. In this guide, we will cover how to install and configure Squid proxy server on Ubuntu 18. How to Install Varnish on CentOS 7 or RHEL 7 its dns is pointing to the IP address of the server. Clients make requests to the proxy which communicates with external sites, then send the response back to the client. How to Install Squid on CentOS 7/8. 104:8118 This is my main OS ip, but I see "Connection refused …" errro. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. com and so on. 6 Special Features in SUSE Linux Enterprise Server. In this article, we will show you how to configure the Squid proxy server in order to grant or restrict Internet access, and how to configure an http client, or web browser, to use that proxy server. Proxy servers are used to share an Internet connection with clients. For Squid-3. Instead of manually clicking renew or release on mikrotik dhcp client when the server up, we created a simple scheduler which run a script every 5 minutes to check the network address and keep request new address every 5 minutes if the network address is not the address supposed to given to the mikrotik dhcp client until new address provided. Clients make requests to the proxy which communicates with external sites, then send the response back to the client. Squid Proxy integration with Active Directory – The quick and simple way. Squid server are designed to run in Unix like operating system. This howto will show you the steps to install and configure a Squid 3 Proxy Server on CentOS6. I happeneded to be running Squid version 3. Howto block or ban facebook by squid proxy, How to block facebook and social network on your office, How to ban social network by squid proxy. how to install squid proxy on centos 7. Squid functions by tracking thing use above the network. Setup Caching-Only DNS Server Using “Bind” in CentOS 6. The following article is all about how to install and configure a private proxy server using Squid in your Debian 6 VPS. 04 LTS and Ubuntu 16. conf acl localnet src [YourIP] service squid start Redirect Traffic. This article will help you to step by step. N Number of storage objects into S3 Bucket, however after storing the lot of objects we would like to know how much of storage we have utilized. Look at a network above. Forward & Reverse Apache Proxy - CentOS 7 August 28, 2014, 14:30 20 Comments There are two possible configurations for Apache Proxy Server and we will present installation and configuration of both types this how to. gabrielcanepa. 15 Hostname : dev2. Now lets configure, the proxy server as web filter. To add the EPEL repository to your system, use the following. Squid is the most popular proxy server for UNIX/Linux systems. Actuly the inter valn routing is done in my L3 switch in Network i ping from one vlan to anthor vlan. Squid Transparent proxy server : How to configure. Hi we have Centos Server and we have client machines using Ubuntu 12. Installation Steps. It is a widely used proxy server. Save & Exit. Squid can be configured as a reverse proxy as well, but that type of setup is not covered in this article. Note: This tutorial is tested on CentOS 7. This file is going to allow us to specify the host names to reverse proxy. To install and configure Squid on Ubuntu Server 16. Please note that unless you follow the last section of the guide Anonymizing Traffic, this will not anonymize your traffic to the outside world, as your originating IP address will still be sent in the X-Forwarded-For header. now edit and change main configuration file # TRANSPARENT SQUID ON CENTOS 6. Step by Step Install and configure transparent squid proxy on linux/Centos auth_param basic realm Squid proxy-caching web server. Installing and configuring Squid proxy server Ástþór IP. Model Chuẩn bị: Server : Centos 7 Client : Window 7 I. This article will give you complete details about configuring the static IP. How can I delete the squid log files autometically after every 2 days. Reproducible: Always Steps to Reproduce: 1. This guide will cover using Squid as an HTTP proxy. Using the Windows PE tools and a Windows 10 image file, you can install Windows 10 from the network. In this article we will be learning how to install and configure Squid and squidGuard, along-with step by step process to block a single or list of websites on Squid proxy. Imagine that you are creating a web server for practicing purposes using CentOS or RHEL 7, once you finished installing the OS, assigning an IP, changing the hostname, blah blah blah, and more blah, you go straight to the httpd package download and installation using YUM and guest what? you receive the following message:. Follow the guide Setup Transparent Proxy Server with Squid3 on Ubuntu server 12. Please follow below steps to configure your squid proxy server. In our tutorial, we'll be instructing on how to install on an Ubuntu 16. com Linux Tips, Tricks & News Today ! - Through on this article you will get idea to Install and configure Squid Cache 3. com provides technical information about server configuration and software installation on centos, ubuntu and other linux flavors. Now open the web browser and set the port number and ip address of proxy server in connection tab If you can successful retrieve website mean squid is working correctly Now try to open www. Webmin is a web-based interface for system administration for Unix. This blog post guides you in getting NGINX and NGINX Plus up and running on Ubuntu 16. This how-to explains how to install the current version of Squid Proxy on a CentOS 7 VM with Webmin, Apache, and SARG with update support from How to Install Squid Proxy on CentOS 7 with Webmin, Apache, and SARG - Windows Server - Spiceworks. Install Squid to configure Proxy server. The proxy server pulls the resource and relays it to the user, by caching the new data and using it for future requests made to the same server. Save & Exit. Setting Up Virtual Host / Server Blocks on CentOS Step 1: Create Directory Structure. 0 and firewall. Model Chuẩn bị: Server : Centos 7 Client : Window 7 I. Squid proxy server. x /etc/init. 04 and Win7,I Have Configured Squid only purposely for facebook denied, Cos User;s often being in fb so need to do it, have configured squid as transparent , followed this How to install squid proxy on centos 6 steps to did it and. This tutorial explains how to set up Squid on CentOS 7 and configure Firefox and Google Chrome web browsers to use the proxy. Check the box that says 'Use this proxy server for all protocols'. This walkthrough describes how to configure a PXE server to load Windows PE by booting a client computer from the network. Just change the proxy setting on your browser to the IP address of the proxy and the port 3128 since this is the squid default port. For Squid-2. It can be used for multiple purpose like caching, web filtering and else. This article explains the steps to install squid proxy in Windows server. Before knowing Transparent Proxy Server first of all we know about Proxy Server. So, before we start. Adblock detected 😱 My website is made possible by displaying online advertisements to my visitors. For Squid-3. Turtl server is written in Common Lisp, so we need to install Common Lisp and QuickLisp on the system. The reverse proxy will forward requests to other servers and ports. The default port for the Squid proxy servers is 3128. Step 1: install squid. islamiabsitos. I'm in the process of getting the latest squid compiled and installed with ssl right now. At the time of writing this tutorial the current stable version of squid is squid-3. It is a widely used proxy server. Just follow each step of this guide carefully and everything will be ok. 6 release date is 25 Jun 2014. 7 (CentOS release 6. Hi all, I have set up numerous squid boxes before (that actually module by refreshing all modules in the Webmin Configuration menu. 04 / Ubuntu 16. This guide will cover using Squid as an HTTP proxy. I n this article we are going to learn How to mount and unmount Linux file system. This walkthrough describes how to configure a PXE server to load Windows PE by booting a client computer from the network. Main benefit of transparent mode is, clients are not aware that their requests are processed through the proxy. Proxy and HTTPS setup for Confluence. A proxy server is a computer that acts as an. Squid with active directory authentication on Centos 6. Squid is a full-featured web proxy cache server application which provides proxy and cache services for Hyper Text Transport Protocol (HTTP), File Transfer Protocol (FTP), and other popular network protocols. The simple reason. Click the Manual proxy configuration button. Book Description. Clients make requests to the proxy which communicates with external sites, then send the response back to the client. To help in this process is Squid, which is a web proxy server for Red Hat. Unfortunately, popular modern browsers do not permit configuration of TLS/SSL encrypted proxy connections. rhel 7 dns client configuration, how to configure dns server in centos 7 step by step, dns server configuration in linux step by step ubuntuhow to configure dns server in centos 7 step by step,. 6 ” Joshua Geake juni 10, 2011 om 9:10 pm. Select the Use this proxy server for all protocols check box. 1 iptables, 9. Welcome to the Ubuntu Server Guide! Here you can find information on how to install and configure various server applications. Try to connect to HTTPS site, which will be blocked by proxy server Actual Results: Firefox will display "Page Load Error" with description "Proxy Server Refused Connection. Note: This tutorial is tested on CentOS 7. Using the Windows PE tools and a Windows 10 image file, you can install Windows 10 from the network. STABLE6 and Burned into the CD I also install my Linux Debian Mail Server to run the squid-3. Squid Proxy Server can run on many major. HTTP proxy configuration for Docker on CentOS 7. Squid packages are available in default yum repositories. 2-step apache auth aws battery centos cgi Cisco control panel cpanel debian dhcp disk fastcgi fdisk google grep group iptables kernel 2. 2) Changing squid proxy port number. In this article we have discuss about Squid (Transparent) Proxy Server installation and configuration on RHEL 6/5, CentOS 6/5, Scientific Linux 6/5 and Oracle Linux 6/5. Hi, how to configure transparent proxy server in centos 7 machine any body can you give me total process step by step of configuration transparent proxy. For example, you can specify the proxy server setting as follows: Proxy Server: www-proxy. So let's look at how to configure Squid as HTTP and HTTPS Transparent Proxy. However there are some options which can also be controlled using additional command line options while running Squid. Today we are going to configure forward proxy on Ubuntu using Squid3. 7 and later two helpers are bundled with the Squid sources: squid_kerb_auth for Unix/Linux systems. For the purpose of this article, I will be installing Squid on a Linode CentOS 7 VPS and use it as an HTTP proxy server. Install Squid to configure Proxy server. You might consider using a reverse proxy when you want users to access the Atlassian applications:. If your Linux machine is behind a proxy server then to access the internet, proxy configuration will be required. Squid is one of the most popular Proxy server for Linux. Up to version 2. 5) (Hafiz configure squid server in redhat 6 (rhel 6) in hindi by aasaanhain. 1 Getting the software • 10. Step 5: Client Side DNS Setup. This is a short guide on how to set up a transparent squid proxy server. In this file, we can add our own rules (acl) to add specific IP-Address, Block Sites and Block Downloading, etc. I got a chance to configure the Squid transparent proxy and my task is simple to setup Squid proxy as transparent server. 0 - TECHSUPPORT Home. 7 (CentOS release 6. Also, just a reminder that rsync uses TCP port 873 so you may have to allow it outbound in your egress firewall rules and/or configure it to work with your proxy server. Webmin is a web-based system configuration tool for Unix-like systems, configure operating. In this guide, you'll see how to install Squid on CentOS 7 to turn your server into a web caching and forwarding proxy. Execute below command on your. Squid is a popular, free Linux program that allows you to create a forwarding web proxy. squidGuard segmentation fault with squidGuard on Centos 7 Hello, I'm following the Linux Foundation Certified Systems Engineer course and am doing the HTTP services section, squid proxy. To configure Oracle Configuration Manager to use a proxy server, enter the following details. My setup is on CentOS 7. Once we have this proxy conf in place, nginx will load it along with everything else. In this guide, we will demonstrate the installation and configuration of Apache CouchDB on a CentOS 7 server. Type action name what you like in Name field (example: Webproxy) and choose remote from Type drop-down menu. Step 1 - Spin up a CentOS 6. In this article,we will explain How to Install and manage the Apache web server on CentOS 6/7 Linux System. Why Squid?. iptables recipes on how to do that (there are some. 2 and later the Unix/Linux helper is called negotiate_kerberos_auth. The software not only saves bandwidth and speeds up access time, but also gives administrators the ability to track web usage via web-based reports. Execute below command on your server to install SQUID proxy server. Before proceeding with this article, please make sure you have added your Linux server to the Active Directory domain. Its a caching proxy server which supports HTTP, HTTPS, FTP. Make a rule for transparent proxy on the menu IP> Firewall> NAT • Transparent proxy with proxy servers separate / independent MikroTik Web Proxy built in according to my observations not so good compared to the squid proxy in Linux, squid in Linux has more flexibility to be modified and diconfigure, eg for delay-pool feature and ACL lists that include files, not in the proxy series 2. Tested with log files from Squid 2. and restart squid proxy server by. 23 Let me move on to the Squid. You will see that you are now browsing the internet through the proxy server. Installing Linux, Linux Command Line, MySQL server setup, UNIX, Virtual Server & more - it's all covered step-by-step. Log files location 7. Squid Proxy Server can run on many major. The Domain Name System. Setup DNS (Bind) Server on CentOS/RHEL 7/6/5. 3 i had to reinstall squid to make it work probably. Let’s take you through steps involved for configuring Squid proxy authentication with Active Directory. Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Install Squid proxy server on Ubuntu 14. Our example is using CentOS 7 server with. STABLE4-bin. Squid proxy server. However there are some options which can also be controlled using additional command line options while running Squid. In this guide, you'll see how to install Squid on CentOS 7 to turn your server into a web caching and forwarding proxy. The following step will show how to install Oracle VirtualBox on linux CentOS 6 or CentOS 7.