yeah better check first,..but most probably its not,..been allowing it to access the net since my system's first boot.
This is taken from-http://www.answersthatwork.com/
"Windows 2000/XP only. SVCHOST is a generic process which acts as a host for other processes running from DLLs. Depending on the configuration of your system there may be more than one instance of SVCHOST showing in the Task List.
An integral part of the operating system, leave alone"
It seems you have to allow access, or you can't go online (broadband), But not to act as server.
again,..its better to be sure...so check first for viruses