Trying to Find A Certian Lan Software

[RoyalBishop]

Hey all, I recently Formated my hdd and I forgot what program I use when I want to lan across the internet with games and what not. I think it starts with a H or a M dunno if Im right. The program can a number of computers and make it seem like a lan than a wan connection. Thanks

 

[SunnyD]

Hamachi?