Aniv,
We have spoken with the lead MarketScan programmer, and he tells us that a new version of MarketScan will be released in about a months time, that will allow it to work over port 80. Port 80 is the standard web browser port, which you use to work DataDirector, Web browsing, etc.
Once this is released we will notify users of the upgrade via the MarketScan window, DataDirector page and our website. Then there will be no more getting your Network Administrator to change your companies or your personal firewall.