Same update on multiple servers automatically

Hi all,

We have a website that deployed on multiple servers and works by own database (ASP.NET, .NetFramework 4)

Is there a methods or tools to update specified files (like dlls) on all servers? Note that ftp service is not available on servers. In other hand, because these server are local and in specified times, are connected to internet; We want to automate this operations to servers update itself automatically when connect to internet.

Thanks and sorry for my bad English!