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The next step is to establish a <u>tunnel</u>. When you establish a tunnel you make an ssh connection to a remote host and open a new port on the local host.<br>That local host port is then connected to a port on the remote host through the established tunnel. When you send requests to the local port it is forwarded through the tunnel to the remote port.<br><br>
<ol><li value="16">Switch to your '''c7host''' VM, and make certain you are logged in as a regular user (i.e. '''NOT root!'''),</li>
<li>We are going to establish a tunnel using a <u>local port</u> (port number: '''20808''') on our '''centos1''' VM that will connect to the <u>remote</u> port: 80 on the '''c7host''' VM.<br>Issue the following command (in centos1from c7host):<b><code><span style="color:#3366CC;font-size:1.2em;">ssh -L 20808:centos1:80 yourUserID@centos1</span></code></b><br><br> '''Note:'''<br>The '''-L''' option (which means Local port) takes one argument:<br><span style="courier"><local-port>:<connect-to-host>:<connect-to-port></span><br><br> The command basically connects your local port of 20808 to the remote port of 80 on '''c7host'''.<br>This means all requests to 20808 on the <u>localhost</u> ('''centos1''') are actually tunneled through your ssh connection<br>to port 22 on '''c7host''' and then delivered to port 80 on '''c7host''', bypassing the firewall.<br><br></li>
<li>Once the tunnel is established use '''netstat''' to verify the port 20808 is listening on '''centos1'''</li>
<li>Now using the browser on '''centos1''' connect to '''http://localhost:20808'''</li>
