\xampp\apache\conf\extra\httpd-xampp.conf
<LocationMatch "^/(?i:(?:xampp|security|licenses|phpmyadmin|webalizer|server-status|server-info))">
ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
Order deny,allow
Deny from all
Allow from 127.0.0.0/8
Allow from 192.168.11.0/24 <--公開する相手のIPアドレス
</LocationMatch>