Using the Windows fireall breaks 2 of the 3
cardinal rules for safe browsing:
1) Use a good firewall.
2) Never open email from Paris Hilton.
3) Never use Microsoft software online.
In this test the Windows Firewall came in last
among dozens, though it's hard to figure out
exactly what was tested:
http://www.matousec.com/projects/windows-personal-firewall-analysis/leak-tes
ts-results.php
If you only have a one-way firewall then you'll
probably find out later if you get some kind of
inection. (Most viruses, etc. will try to call out,
so they'll trip a 2-wat firewall as soon as they're
onboard.)
You also won't know about spyware, which includes
corporate spyware. (Which includes installed
Microsoft software.) It used to be common decency
for software not to go online without asking, but
these days a lot of corporate software does so.
On the other hand, if you want your software to
auto-update and don't care about music players,
etc. spying on you, then it's only infections that
you need to worry about.
Wonder if the built-in one way firewall is safe, compared to the two way
firewall, such as ZoneAlarm, etc. The reason
for asking this question is, I am not sure if I should allow some of the
programs that ask for Internet connections.