I had that problem today because my DNS got messed up. I restarted my computer and got the sharing back. It sounds like your DNS is not correct.
Does your hostname in terminal return you Fully Qualified Domain Name? Can you do a revers lookup with Network Utility?
If not there are tricks to get it right. YOu can email me at philATmcsclasses.org
Does your hostname in terminal return you Fully Qualified Domain Name? Can you do a revers lookup with Network Utility?
If not there are tricks to get it right. YOu can email me at philATmcsclasses.org