Which ports to leave open?

I'm configuring TCP/IP Filtering in win2k and need to knwo what to leave open.

These are programs I use:

Apache
FTP
POP3
SMTP
MySQL
PHP
Terminal Services

Looking at that, I'm thinking 80, 21, 110, and 3389. Correct? Cuz the others don't receive requests accross the web.

what's confusing me is this TCP and UDP thing.

Do any of the programs I'm using use UDP?

Should I deny all UDP requests?

Your help is appreciated.

 

 

 

 

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