Port Forwarding

Before we get too far ahead discussing antennas we need to address the very important subject of configuring software for port forwarding.

Port forwarding is necessary for getting through the firewall on the router at the remote site.  Otherwise when the I.P. address of the remote base is entered the packets would get blocked by the firewall.   Remote Rig is the device that needs to be reached behind the firewall.  Other devices might have been added like we did (the Remote Power Monitor ).  Entries need to be made for each device using unique port numbers.

Find the page where port forwarding is configured on your router.  On our Linksys it was under the “Applications and Gaming” button and then under “Single Port Forwarding”.  First enter the “Application Name” which is what the device will be called by.  Our Remote Rig is being called Rem Rig.  In the next column is the port number chosen arbitrarily.  You can chose any port number you want that is available. ( ISP’s block certain ports ). We chose 81 because it’s the next port after web pages ( port 80 ) and it’s not being used by other services.

In the next column the port number used by the Remote Rig is entered.  This is normally Port 80 because it is the Remote Rig’s web page. Port 80 displays the internal web page and this is what we want to access.  Here is what our port forwarding page looks like.

Screenshot 2016-02-04 06.25.31

We also need to reach the ports used for sip and the voice packets on the Remote Rig.  Those ports are 13000 through 13009.  Those can be put in one at a time on the Single Port Forwarding Page or all at once with one entry on the Port Range Forwarding page as shown below.

Screenshot 2016-04-04 11.59.12

 

For the Remote Power Monitor we chose the next available port number which is 82. We will forward port 82 to the Monitor’s port 80. It does not require any other ports because all the information is displayed on the Monitor’s web page.

To reach the Monitor from any place on the Internet we type in the I.P. given to us by our ISP followed by a colon and the port number.  Let’s say, for example, we had been given 72.7.12.24.  We would use our web browser and type in 72.7.12.24:82.  Up pops the Remote Power Monitor main page.

At some point we need to find out what the I.P. is that our ISP has given us.  This can be done by going into the router’s status screen and looking at the Internet or WAN address.   If the first number begins with a 10, 172, or 192 more work needs to be done.  Those are private I.P. addresses behind a firewall and you need a public address.  You must obtain a public i.p. from you Internet Service Provider and there will likely be a fee involved.  The fee we pay is $10 a month.

Although we haven’t tested it there might be a way to save the fee and get around the firewall by using proxy sites.

Earlier we found the I.P. address of the Remote Rig.  That information is located in a “dhcp table”.  The router will have a button somewhere to display the table. On our Linksys the button is located right on the front page and it’s called “dhcp reservations”.  Remote Rig was not named so we had to obtain the (12 character) MAC address from the physical label on the Remote Rig and then search for that mac address in the dhcp table.  For us the i.p. address is 192.168.3.134 (It later changed to 192.168.3.147).  Beginning with a 192 is ok here because we are on the LAN side behind the firewall and that’s where private addresses are used.

And now we’ve discussed port forwarding and hopefully shown how easy it is.

Here’s what Morningstar says about port forwarding on their web site:

There are many different router models, so we cannot provide specific direction in this document for configuring port forwarding. However, the website:

http://www.portforward.com

provides a comprehensive list of routers and instructions for port forwarding.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s