Minecraft Multiplayer Server

I have downloaded LogMeIn Hamachi and have created a network which I have had friends join.
The server was working fine and my friend could connect, but when she did she couldnt type or use any commands, i thought it was just Mac and Windows clashing, is that possible?

Just recently i had my other friend download hamachi (both friends have it) and join my network, the server was running and i gave her the address but she couldn't connect. I reset the server, same issue. She restarted minecraft, same issue. She restarted her computer, same issue. I restarted my computer same issue.

Does anyone know what is wrong with my server? How do I fix it?
(PS> my friend lives in Northern Ireland and i'm the host in Australia, my other friend is in Australia, would this affect anything?)

10 POINTS BEST ANSWER.

Professional/Creative writer needed?

Hi, so i'm looking for a really creative or professional write for fantastic idea here. So, basically i need ideas on backing up this feature i'm trying to create for a server on Minecraft.

Can you please try think of some information that can really help me thrive through this?

Here is my feature information, help me add more!:

Hey, I've had a cool idea that i'd like to share with you. Please do give feedback of what you think.

Personal House (This title could go on forever possibly, so i'll skip to the idea)

Basically, you can teleport to your own house area from something like the compass. I reckon you would have a separate inventory than you would on the servers. You can spend emeralds to expand your plot (This is all done from a menu like the one when you log into classes and such) and you can spend emeralds on customizing your house maybe through a construction menu or just by buying blocks from a menu and then placing them down. Also, maybe a feature could awaken for clans/villages, or you can invite friends over to your house and maybe a party feature there (with beautiful fireworks and so on). I understand there could be some problems due to this being serverside and costing alot of money, but i'm sure there could be some reasonable suggestions due to that throughout the network staff. Would be cool to have paintings or armour stands showing your characters armour and stats. I haven't thought about storage being in the house, because that could be possibly

Added (1). exploited for duping or something similar (But should be fine if all you can store is blocks you have purchased from a menu). This can go on with many ideas, so i'd like for all of you reading this to make some ideas below!

[Edit (New ideas)]
*You can access this house area only if you do a quest that gives you a certificate to own a house, then maybe you have to buy scrolls to teleport there only.

*Maybe depending on your highest level character, or the character you completed the quest with

Server IP addresses for MineCraft?

Ok so I've been watching joey graceffas minecraft along with stacyplays' videos. I've been wondering what are the servers ip addresses for his:
Mega Walls
Party Games Server (along with other games)
MCSG
Attack of the B-Team
Quest for Pumpkin
Epic Trolling Map
UHC (Ultimate Hardcore)
Herobrines mansion
STACYPLAYS:
The Cube (isn't there a local server)

If you had the chance to answer this thank you!

Can someone good with computers please explain this error?

FATAL ERROR: java.lang.NoClassDefFoundError: Could not initialize class javax.crypto.JceSecurity
at javax.crypto.Cipher.getInstance(Cipher.java:499)
at sun.security.ssl.JsseJce.getCipher(Unknown Source)
at sun.security.ssl.CipherBox.<init>(Unknown Source)
at sun.security.ssl.CipherBox.newCipherBox(Unknown Source)
at sun.security.ssl.CipherSuite$BulkCipher.newCipher(Unknown Source)
at sun.security.ssl.CipherSuite$BulkCipher.isAvailable(Unknown Source)
at sun.security.ssl.CipherSuite$BulkCipher.isAvailable(Unknown Source)
at sun.security.ssl.CipherSuite.isAvailable(Unknown Source)
at sun.security.ssl.SSLContextImpl.getApplicableCipherSuiteList(Unknown Source)
at sun.security.ssl.SSLContextImpl.getDefaultCipherSuiteList(Unknown Source)
at sun.security.ssl.SSLSocketImpl.init(Unknown Source)
at sun.security.ssl.SSLSocketImpl.<init>(Unknown Source)
at sun.security.ssl.SSLSocketFactoryImpl.createSocket(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.createSocket(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
APPEARS WHEN DOWNLOADING MINECRAFT, Please CAN SOMEONE OFFER A SOLUTION

How to open a cracked minecraft server?

Well i want to play minecraft with a friend but he doesn't have the game, i opened a server with hamachi, and i can join, but when he tries to join all it says is bad login, and yes he is connect with hamachi, how can i allow a cracked minecraft version to join? And its a 1.5.2 server.

How to make a public Bukkit MineCraft server on my mac?

I already have a BUKKIT server that's running on Hamachi but I wanna know how I can do this without Hamachi

I'm using a Mac OS X version 10.7.5

It needs to be a BUKKIT server not vanilla

Added (1). Also, I don't live in the US.

Is it possible to run a Minecraft server on a laptop, and play it on a PC?

So I thought I might give my PC a little less stress, so I thought "Oh wait. I have a laptop"
The laptop has 4GB of RAM and I try to run the server but sadly it says

"perhaps a server is already running on that port"

What does this mean exactly? Will I need to delete the server off my PC altogether and have it stay on the laptop? How exactly will I work this to work on my laptop and play the game without lagging like hell on the PC

;Note; I have the server up and running except it just says that port issue