the more ports you have open, the more ways people have to get into your system.
A firewall is like using a sheet to protect yourself.... unblocking ports, is like poking holes in the sheet,
I dont reccomend opening 29 unneccissary ports ... tbh even if you did i doubt youd get hacked ... but thats still 29 unused holes in your firewall.
However, A sheet wont save you from a kung fu master... and a firewall wont stop a skilled hacker. howver leaving holes in your sheets is inviting bugs n stuff to come wandering in
[like that analogy ? made that up as i went =P]
lmao .. I hate norton
I use a ghetofied outdated crappy version of ZA, its a crappy firewall, but it gets the job done.