htaccess ip restriction

Create .htaccess file inside your site folder and copy the below content to .htaccess file and replace "your_site_folder" to your's and also the IP

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AuthName "Restricted Area"
AuthType Basic
AuthUserFile /var/www/vhosts/your_site_folder/.htpasswd    #path to htpasswd   
AuthGroupFile /dev/null


Satisfy Any
<Limit GET POST>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.0.5              #(ip needed to be allowed)
    Allow from 192.168.0.6              #(ip needed to be allowed)
    Allow from 192.168.0.7              #(ip needed to be allowed)
    Require valid-user
</Limit>
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OR                                                        

The htpassd file can also be added in /etc/apache2/site-available ceare a file in this folder and add the below line to that folder. And below is that if you are using proxy.

<VirtualHost *:80>
      ServerName kir.example.com

    ProxyRequests off

ProxyRequests off

    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>

    <Location />
        AuthType Basic
        AuthName "Please Log in"
        AuthUserFile /var/www/myapp/.htpasswd            #path to htpasswd file
        Require valid-user
        Order allow,deny
        Allow from 000.00.00.00
        Allow from 000.00.00.00
        Allow from 000.00.00.00
        satisfy any
        ProxyPass http://localhost:3500/
        ProxyPassReverse http://kir.example.com:3500/
    </Location>

</VirtualHost>