Connecting Different MC Versions to server

I'm not sure if this is where I put this, but it is the best place I could think of. I've noticed multiple servers have the ability to connect 1.7.2 clients to their 1.7.10 server. I'm wondering how I would enable this on my server, or if I need a specific plugin to do so. Any help would be wonderful, and if you're a moderator, feel free to move this thread to the correct place.

 

Nope, not possible with Craftbukkit.

 

I thought it wasn't, I was just wondering how it was done. I don't want people to have to upgrade to play on my server. This is the reason why:
I was wanting InventoryTweaks Mod, but I needed 1.7.2. One of my favorite mods, I can't use because of my server version. I was just wondering how it would be done.

 

nateracecar5 It's done by some complex protocol & packet manipulation. Having different versions connect can cause errors if a pad packet is accidentally sent to a client that can't handle it. These aren't 100% bomb-proof, but servers like mineplex and such do have decent systems. I don't know of a way you can get this without coding it yourself.

 

ZanderMan9 Thank you! This explains a lot. I have NO idea how to do this, and probably won't even bother with it. Thank you for the information.

 

nateracecar5 No problem! Glad to help
Also, oops! Not "pad packet", BAD packet.

 

Didn't notice