port scan test

From: adcb (I_Will_Not_Give_My_Email_As_I_Am_Sick_of_Porn_Spam_at_btconnect.com)
Date: 07/03/03 

Date: Thu, 3 Jul 2003 10:36:49 +0000 (UTC)

I am trying to test a new firewall and want to check what ports are
open on the thing, how do i do a full scan of the ports, i.e. all 60
odd thousand of them (aside from paying someone to do it)

in addition is there a list anywhere of the more obscure ports used by
programs and what they are. i know all the usual 25, 21, 80 etc but
not the others

thanks

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