apache port forward

You have to use http://localhost:port to visit http://localhost, to help you omit the port part, now let us learn to configure apache2.

First to install apache2.

sudo apt-get install apache2

Then to add some modules that are used.

a2enmod proxy
a2enmod proxy_http

So now apache2 could proxy HTTP request.

Enter $APACHE_HOME/sites-available folder, create a file with content below:

# This is to capture all :80 port to here
<VirtualHost *:80>
    #This means to capture this domain name
    ServerName your.domain.name
    ProxyRequests Off
    ProxyPreserveHost On
    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>
    #This is to enable forward and backward proxy
    #First line is to proxy all request from http://domain/ onto http://domain:port/
    #ProxyPass /example http://yet.another.domain.name:port/other-example
    ProxyPass / http://yet.another.domain.name:port/  
    ProxyPassReverse / http://yet.another.domain.name:port/
    <Location /webapp>
        Order allow,deny
        Allow from all
    </Location>
    ErrorLog  /var/log/apache2/myapp.err
    CustomLog /var/log/apache2/myapp.log  common
</VirtualHost>

Well seems we have done a lot, now you need to symbolic link this file to $APACHE_HOME/sites-enabled

cd $APACHE_HOME/sites-enabled
sudo ln -s ../sites-availables .

Now just reload apache by:

sudo service apache2 reload

To see if it works!
Cong if you got it done, along integrated with tomcat folder mapping, now we could use http://domain.name to visit our application which originally needs http://localhost:port/appname/