From: Hu Zhang <huzhang1982_at_gmail.com>
Date: Fri, 17 Jul 2009 15:23:06 -0400

I used virtual server to host two DNS (http://www.aaa.com and
http://www.bbb.com) on one physical server. But when accessing them, I have
to specify the port number. (http://www.aaa.com:8080,
http://www.bbb.com:8181) How can I get rid of the port number?