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What is the cable modem connected to? Do you have a router? Is it commercial multi-IP service or a basic single dynamic IP? Is there a firewall appliance?
You need to figure out the complete topography before you can even start to try to pin down problems. Get qualified help if you need it, bring in a consultant if you have to.
EDIT: Just found your thread about the server running out of hard drive space. This may be related.
Last edited by glc; 12-24-2008 at 09:33 AM.
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