Tripper wrote:
>
> 4) Can anyone explain to me why "Generic Host Services" wants to go
> out on port 1900? I've blocked it, but what is port 1900?

R.C.White answered the other questions.

Port 1900 is used by SSDP Services.
[url]http://www.blackviper.com/WinXP/service411.htm#SSDP_Discovery_Service[/url]

Don't install/use MSN Messenger (I'm not talking about XP's "Windows
Messenger" -- they aren't the same thing) and you can safely leave it blocked.

--
- relic -
They call it PMS because Mad Cow Disease was already taken.