virus protection is hardly needed for linux, and internet firewall protection isn't needed if you are running behind a router, and is hardly needed anyways...
Virusses, do not target linux much because that'd be targetting a minority, and a mostly technical minority at that,
It will ussually come with a firewall closing all open ports, which is still never 100% secure, but behind a router nobody is going to get past it unless you post on the web somewhere "I bet nobody could hack this linuxbox"
Also xbox-linux would be too slow with virus protection anyways
