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  3. How To Setup Apache Virtual Host Configuration (With Examples)

How To Setup Apache Virtual Host Configuration (With Examples)

Rsdaa 30/10/2021 1220

Using Apache Virtual Host, you can run several websites on the same server.

For example, I can run both thegeekstuff.com and top5freeware.comon a single physical server that has one Apache webserver running on it.

Fig: Apache Virtual Host (Multiple websites, one Apache)

There are two types of Apache virtual host configurations: 1) IP-Based Virtual Host and 2) Name-based Virtual Host. Name-based virtual host is recommended for most scenarios.

IP-Based Virtual Host

In this configuration, when you are pointing two websites (with different ip-address) to the server that runs Apache, that physical server should have two different ip-address configured.

This means that the server should have two ethernet cards, each one of them configured to the ip-address of the corresponding website that Apache virtual host will be serving. So, this is not practical for most aspects, and you should not be using this.

In the following example, the server contains two NIC cards, one is configured with ip-address for thegeekstuff.com, another is configured with for top5freeware.com. Both these ip-address are served by a single Apache webserver running on that server using IP-Based virtual host.

Fig: Apache IP-Based Virtual Host

Name-Based Virtual Host

In this configuration, when Apache webserver receives a request, it looks for the hostname in the HTTP header, and depending on the hostname, it servers different websites. This is very easy, as you need only one ip-address on that physical server; but, you update the DNS with multiple website names pointing to the same ip-address. For all practical purpose, you’ll be using only Name-based virtual host configuration.

In the following example, the server contains only one NIC card, which is configured with ip-address. The DNS entry for both thegeekstuff.com and top5freeware.com website points to ip-address. When Apache recives a request, it looks for the hostname entry in the HTTP header, and serves the corresponding website.

Fig: Apache Name-Based Virtual Host

1. Uncomment httpd-vhosts.conf in httpd.conf

If you’ve installed Apache 2 from source, by default, the following line will be commented in the httpd.conf file. Uncomment this line.

# vi /usr/local/apache2/conf/httpd.confInclude conf/extra/httpd-vhosts.conf

2. Setup virtual hosts

Modify the httpd-vhosts.conf as shown below to setup named-based virtual host setting for two hosts.

NameVirtualHost *:80 – Indicates that all the name-based virtual hosts will be listening on the default port 80– Enclose all the apache configuration parameters for each and every virtual host between these VirtualHost tags. Any apache directives can be used within the virtualhost container.In the following example, we are setting up virtual host for thegeekstuff.com and top5freeware.com listening on the same port 80. So, there will be two, one for each website.When you go to thegeekstuff.com, the files under /usr/local/apache2/docs/thegeekstuff will be served by Apache; and the access_log and error_log for this site will go under /usr/local/apache2/logs/thegeekstuff# vi /usr/local/apache2/conf/extra/httpd-vhosts.confNameVirtualHost *:80ServerAdmin ramesh@thegeekstuff.comDocumentRoot "/usr/local/apache2/docs/thegeekstuff"ServerName thegeekstuff.comServerAlias www.thegeekstuff.comErrorLog "logs/thegeekstuff/error_log"CustomLog "logs/thegeekstuff/access_log" commonServerAdmin ramesh@top5freeware.comDocumentRoot "/usr/local/apache2/docs/top5freeware"ServerName top5freeware.comServerAlias www.top5freeware.comErrorLog "logs/top5freeware/error_log"CustomLog "logs/top5freeware/access_log" common

3. Check VirtualHost Configuration Syntax

Verify virtual configuration syntax using “httpd -S” as shown below. When everything is setup properly, it just displays “Syntax OK”.

# /usr/local/apache2/bin/httpd -SVirtualHost configuration:Syntax OK

When something is not configured properly, it will display warning message, including “directory does not exit” message as shown below.

# /usr/local/apache2/bin/httpd -SWarning: DocumentRoot [/usr/local/apache2/docs/top5freeware] does not existWarning: ErrorLog [/usr/local/apache2/logs/thegeekstuff] does not existSyntax OK

4. Restart the Apache and test

# /usr/local/apache2/bin/apachectl restart

Now, when you go to thegeekstuff.com (or www.thegeekstuff.com), the apache will serve the files from /usr/local/apache2/docs/thegeekstuff directory.

When you go to top5freeware.com (or www.top5freeware.com), the same apache running on the same server will serve the files from /usr/local/apache2/docs/top5freeware directory.

Just to reiterate, for the name-based virtual host to work properly, the DNS entry for both these websites should be pointing to the same external ip-address of the physical server where the Apache webserver is running.

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