Domain Scan and Xp Firewall Exeptions Problems

Domain Scan and Xp Firewall Exeptions Problems

when i make a "Domain Scan," PCs that have the Windows XP firewall enabled give error, however PCs with the firewall enabled complete a successfull Scan.
my question is:
which port o aplication i must add to the exeption list of xp firewall?[/google]

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