I've got dialup, and I've started using firestarter. I'm trying to settup the inbound traffic part. Some explanation: I have my mail 'allowed'. It says something like this for the protocol, port, and server name.
It works. For http, I have the same kind of information, but the server name says 'everyone'.
Should I have a special server for http, or since I dial-up to my provider, and it's http, is 'everyone' appropriate? Any advice would be apreciated. Thanks in advance.

I may be misunderstanding your post, but why do you need the inbound ports open for pop and http? Are you running a mail server and a web server?

No, unless I'm doing something wrong, I'm just trying to limit traffic only from the mail server where I get my mail. I'm interested in finding out if I have to take some kind of special precautions for http... I guess not. I went to http://www.grc.com and they said my computer was open to http traffic. Maybe that's normal. Is it?

EDIT: I've got other things I allow too, like messenger service and an irc server. But I'm trying to find out the specific server for each of those, so I can limit those things -- so that only the things I want are allowed by the firewall.

You don't need those inbound ports open unless you are running a mail or web server. If you want to limit traffic to just the server that you get your mail from, you would want to set an outbound traffic policy.

Don't I want to allow packets to leave the computer freely, but prohibit packets from coming into my computer from sources other than the ones I specfify? Don't I want to allow outbound traffic, and restrict (but not in all cases) inbound traffic?

Don't the servers I put in firestarter in the 'inbound traffic' screen specify servers I want connections with? It seems to work (mostly) now, unless I'm doing something really wrong...?

You have the right idea, but I think you are confused on the whole inbound/outbound concept. I would recommend checking out the following link for more information.

Firestarter Documentation