Apache Reverse Proxy Example

The Simplest reverse proxy configuration possible is the code below, with this configuration your server will proxy all requests from example.com
to subdomain.example.com,

<VirtualHost *:80>
    ServerAdmin [email protected]
    ProxyRequests off
    ServerName example.com
    ProxyPreserveHost On
    <Location />
        ProxyPass http://subdomain.example.com/
        ProxyPassReverse http://subdomain.example.com/
        Order allow,deny
        Allow from all
    </Location>
 
</VirtualHost>

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Disable IPv6 on Linux Via Kernel Boot Parameters

If for any reason you want to disable ipv6 and don’t want to do it with the sysctl directive, another easy route is to append ‘ipv6.disable=1’ to the kernel boot parameters.

The grub Way

Open /etc/default/grub and edit the line that starts with GRUB_CMDLINE_LINUX_DEFAULT.
Add the entry ‘ipv6.disable=1’ to the arguments that are already there.
Save and run

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Apache auto-create Virtual-Hosts*

In this guide we’ll create a generic apache config file to ‘automatically’ create virtual hosts for a specific domain in your server

Sometimes you have a development server with one primary domain, and some sub-domains with your projects and/or stuff that still need to be validated

Firstly you will need to disable SELinux or configure the folders appropriately ( not covered in this guide ).
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Disable IPv6 on Linux Via Kernel Blacklisting

If for any reason you want to disable ipv6 and don’t want to do it with the sysctl directive, if your kernel was compiled with ipv6 support as a module one easy route is to blacklist the ipv6 kernel module.

All you need to do is create/update the ‘/etc/rc.modules.d/blacklist.conf’ file and add the line ‘blacklist ipv6’.

alternatively you can run the following command as root.

echo '
#Disabling IPv6
blacklist ipv6
' >>  /etc/modprobe.d/blacklist.conf

Sources:

https://www.linuxquestions.org/questions/slackware-14/how-do-i-disable-ipv6-in-slackware-14-1-a-4175504618/
https://www.linuxquestions.org/questions/slackware-14/how-to-disable-ipv6-937447/

Disable IPv6 Centos/Debian/Ubuntu

To completely disable IPv6 on your Linux system, side note you shouldn’t but it’s your choice, you can do so simply editing the 99-sysctl.conf file at the location ‘/etc/sysctl.d/99-sysctl.conf’
 
Copy and paste the following 3 lines at the bottom of the file.

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

 
After editing the file you need to then reboot the machine or run the following command as root

sysctl -p

To verify that you have ipv6 disabled you can run

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