I recently added a SharePoint server to our network and everything works fine internally but it cannot be accessed via the internet. It's running on a Windows Server 2008 (x86 Enterprise Edition) box. Our domain has a record to point to our Comcast modem which it does so correctly. The modem port forwards port 80 to the SharePoint server but it can't connect. I'm thinking it's an IIS configuration that's wrong but I'm not too experienced in that area. Recently I added an Exchange 2007 server to the network and forwarding port 443 to that server worked fine but that same logic isn't working in this case. Any help would be greatly appreciated.