I did a deep search over internet and watched videos. There is nowhere that I could find how to make Sharepoint 2010 accesible from internet using SBS 2011.
What could be the steps to do this?
i.e : sharepoint 2010 is running properly on intranet. But the users want to reach it from home as well. And we are using SBS 2011 including Active Directory. How will these users reach sharepoint from home or not only from intranet?
Would you direct me ?
I guess best solution is to provide VPN access to users. - future proof and you don't have to tweak any thing to the server. Its cheaper as well considering the cost and they will have seamless integration to AD
Next since you have already have AD configured ( it depends on how it has been setup) you could have additional ADFS configuration to authorise users.
See if you can upgrade to Windows Server 2012 essentials which gives more power than SBS 11 in terms of Claims authentication
Finally, you have to use Claim Based Authentication for the authentication and DNS routing etc which you might have seen on the videos.
Finally, you have cloud think Azure as well as an option.
Although I haven't configured SBS 2011 for SharePoint extranet, It appears to be same like windows 2008 server (slim down one) according to MSDN which should not affect your requirement. Apart from licensing... ( check this).