What is full trust hosting and what is modified full trust hosting?
Microsoft’s ASP.NET web technology / language allows us to define trust levels, which dictate what operations are
permitted by ASP.NET applications. A web hosting company can either use
one of the preset trust levels - Full, High, Medium, Low, or Minimal -
or can create a custom trust level.
Full trust is the default, allows ASP.NET applications to execute
native code, to read from the Registry and Windows Event Log, and to
read and write to files outside of the application’s virtual directory.
In short, with full trust one web application could delete the entire
contents of another web application.
Now most web hosting companies run in medium trust, which greatly
reduces the potential for harm by limiting the set of operations an
ASP.NET application can perform. But Medium trust will place a number of
restrictions on an application, including limiting an application’s
file access to within the virtual directory where the application lives.
While the protection granted by medium trust is reassuring, its limited
functionality can be a cause of worry for developers. There are a lot
of web applications and components in the market which do require full
trust to work as desired.
Now what will happen, in this scenario. In this case a lot of web
hosts run the web applications as modified full trust, which is a
modified version of full trust and web hosting companies block certain
modules or permissions of full trust. e.g. you can change this full
trust to be effective only for the needed functionality (or vice versa,
disable it for the File IO). This can be done through the .NET Framework
Configuration tools on the server (caspol.exe etc) but it will require
some additional setup.
HostBuddy.com provides our customer both Modified Full Trust and Medium Trust server. You can contact our support to set this up according to your needs.