[apache] Apache: client denied by server configuration

In Apache 2.4 the old access authorisation syntax has been deprecated and replaced by a new system using Require.

What you want then is something like the following:

<Directory "/labs/Projects/Nebula/">
  Options All
  AllowOverride All
  <RequireAny>
    Require local
    Require ip 192.168.1
  </RequireAny>
</Directory>

This will allow connections that originate either from the local host or from ip addresses that start with "192.168.1".

There is also a new module available that makes Apache 2.4 recognise the old syntax if you don't want to update your configuration right away:

sudo a2enmod access_compat