I know this is overwhelming. I would copy and paste and edit them so you can use them better. These aren't from the web, they are from those who have done it. Me, probably ten server setups, Sandeep about 100. Pretty soon - Hyper-V.
PLEASE USE THE WIZARDS.
PLEASE TRY NOT TO GO BACK AND FORTH. YOU NEED ALL THREE COMPUTERS ON THE SAME NETWORK
REMEMBER, IF THERE IS AN ISSUE, IT IS ALWAYS DNS, DNS, DNS, DNS...
I hope you don't need those computers for work. If so, try to get sandbox computers.
If you can't connect, I go against the port (although Sandeep may be on to something. Tell me no McAfee and No Norton. If there is, UNINSTALL THEM, DELETE THEM, TRASH THEM. Next go to the .xml files. I will bet there.