Solved IP confusion?

So this is actually my first time using the lilypad plugin for my new server and I watched tutorials on YouTube and did all the configurations correctly but the one thing that is in my path in creating a successful server is the fact that I cannot open more than one console at a time that I get the java.net.BindException: Address already in use. I read about this on the FAQ section of the forums but what confused me is the part that tells me to change each IP of each server one by one. What confuses me about that is what IPs do I use? I thought you have only one IP only and when I tried to use a lily portal it send me to a nether world because the servers are not online. Thank you.

EDIT: Yes I did run the server through both the proxy and the connect yet I still cannot get all 3 servers to open up at the same time. It only opens up one by one meaning in order to open up my second server or third I must close one in order to get another to start. But now that I try to start the servers using the proxy and the connect the server stops and tells me the same thing again.

Its not the whole ip you have to change. Its the port - at least that's what it looks like for me

So if your first server is running on a port (e.g. 25566) and the second server is running on the same port you'll get that exception.
To get rid of that Problem you need to go in the server.properties of your servers and change the port their running on to unique ports so you prevent two servers from running on the same port.
I hope that helped

So all I need to do is change the ports on each server under server properties? And if so, what's the range number for ports? Example ports 234-560 or something like that because I know a main port is 25565.

EDIT: Got all servers to work at the same time! Thank you so much but there is still one more problem, when I try to go on the server itself (it shows that it is online) but when I do try to join the server it tells me that the requested server is offline! Try again later! Was there something I did wrong in the configurations because it shows that the server is online but when I try to log into it it tells me it''s offline. And also when I start up the servers the console tells me that the [Connect] Unable to start plugin - unsupported version?

I found out that I can only use the connect servers in 1.7. Thank you for helping

Ok great Regarding your questing with the port range: I think for TCP the ports go from 0 - 65535 (or sth like that). But you have to keep in mind taht al ot of these ports are reserved for the system or used by other programs. Here's a list of all the programs that use a specific port. So you only have to check if what program would be on the port that you like and check if it is installed (if it is theres a good chance it uses that port and you schould look for another one). http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers