# For sites running on a port other than 80
RewriteCond %{HTTP_HOST} !^www\.example\.com [NC]
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{SERVER_PORT} !^80$
RewriteRule ^/(.*) http://www.example.com:%{SERVER_PORT}/$1 [L,R]
# And for a site running on port 80
RewriteCond %{HTTP_HOST} !^www\.example\.com [NC]
RewriteCond %{HTTP_HOST} !^$
RewriteRule ^/(.*) http://www.example.com/$1 [L,R]RewriteEngine on
RewriteCond %{HTTP_HOST} ^(example\.lolipop\.jp|www\.example\.com)(:80)?
RewriteRule ^(.*) http://example.com/$1 [R,L]"name-based virtual hosting
NameVirtualHost *
<VirtualHost *>
ServerName www.example.net
ServerAlias example.com
Redirect permanent / http://www.example.com/
</VirtualHost>
<VirtualHost *>
ServerName www.example.com
DocumentRoot /usr/local/apache/htdocs
</VirtualHost>Reference
Apache Server Frequently Asked Questions - Configuration Questions - My site is accessible under many different hostnames; how do I redirect clients so that they see only a single name?http://www.apache.jp/docs/misc/FAQ.html#canonical-hostnames
独自ドメイン運営助け合い掲示板 - サブドメインのアドレスを
http://lolipoking.lolipop.jp/domain/patio.cgi?mode=view&no=4