probably because your computer is to old to handle online play or the halo may have a virus on it, update your computer to new software
you cant...
You can. The server just has to be on when you try to join or the server is whitelisted and you aren't on the whitelist.
you cant...lol
To join a game server (if thats what you mean) you have to be a member of xbox live. You must get "Gold". Then you put in a game with an online feature (like Minecraft or Call Of Duty) and join an online server/game.
First off, an online server means that the server is up and running. It is available for people to join. An offline server means that the server is down and closed for people who want to join.
you give them the IP address of your server and then they tipe it in on the online option on the mane menu of minecraft and then they should be able to join
It can very from person to person. Personally I have read most of the books and have had the privilege to play all of the released games online. Halo CE Halo 2 Halo 3 Halo ODST Halo Reach Yes I am a halo geek, now join us!
BECAuse i dont no what you ARE YOU SAYING
Well as a server owner I know the only way is to run the server in offline mode. When it is in online mode(default) the server checks to make sure every account is premium. You can play on a server if online mode is set to false. This is a check mojang has put on to stop pirating on minecraft. So if you can't join the server is running with online mode on.
Unless your server has a whitelist or a blacklist, anyone with the IP address of your server can join it
You can join the same server.
Go to multiplayer, then go to internet and choose a match to join.