I manage a small SBS2003 network, which doesn't have ISA server - i.e. the SBS box and all clients are wired via a switch to the ADSL router (Netgear DG384G). One of the users has been downloading MP3's from a P2P network and I want to block this sort of activity.
Can I just block particular outgoing ports on the router? If so, which ports do I need to block and are there any legitimate services which may be affected?
Thanks in advance,
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