You don't need a router to get a firewall.  XP has a firewall built in.  Just be sure it is
active for your internet connection.  There are also several aftermarket firewalls.  Norton's
works well.  I have less experience with McAfee's, but the reviews are OK.  Many people like
Blackice.  I don't know Macs, but I am sure software firewalls are available there as well.
The main thing is to be sure to have some antivirus and firewall software installed, and keep
them updated.  If it has been a couple of months since you did an update, you might as well
just uninstall them.

Some other things to keep in mind:  Don't share your root directory.  Disable or rename
accounts named administrator or guest.  Change your password pretty often.  Don't use your
dog's name as a password.  Pick a favorite quote and use the first letter of each word, but mix
upper and lower case.  "Who's on first, What's on second" becomes wOFwoS.

Bill in the Southwest

----- Original Message -----
From: "Richard Brassaw" <sendmeanemail@EARTHLINK.NET>
>
> My understanding is that a firewall will prevent a hacker from gaining
> access to your computer through the internet connection.  Many of
> today's routers have built in firewalls, but not all routers; check with
> the manufacture.