Satellite connections can indeed be hacked. While intercepting the satellite signals is more difficult, someone can still attack you from the Internet itself, as you are usually just running Internet Protocol over the satellite link. So, your satellite hook-up is just as hackable from the Internet as a connection over DSL or (gulp) AOL dial-up.
Your best bet would be to use a personal firewall (such as Zone Alarm or Black ICE) on your systems, as well as an antivirus solution. Don't let your guard down just because you're transporting your info over a satellite connection!
For more information on this topic, visit these other SearchSecurity.com resources:
Strom's Security Tool Shed: AuditMyPC.com a good tool for beginners
Best Web Links: Firewalls
Best Web Links: Malware/Antivirus
This was first published in September 2002