Alias /phppgadmin /var/www/phppgadmin

<Directory /var/www/phppgadmin>
   <IfModule mod_authz_core.c>
     # Apache 2.4
     <RequireAny>
       Require ip 127.0.0.1
       Require ip ::1
     </RequireAny>
   </IfModule>
   <IfModule !mod_authz_core.c>
     # Apache 2.2
     Order Deny,Allow
     Deny from All
     Allow from 127.0.0.1
     Allow from ::1
   </IfModule>
   ErrorDocument 403 "Access denied per /etc/httpd/conf/sites.d/phppgadmin.conf"
</Directory>