To answer your question regarding experiences with comcast@home, you'll find plenty of opinions here
. There is a chance that in some of those messages, you might find some answers to your questions or be able to email someone directly who had similar problems.
From the looks of it, their service is great in some areas and not so great in others. It takes just a few people who don't know what they're doing to ruin it for everyone else.
Unfortunately for us, this means we have to choose which is the better of the worse.
It's certainly not your fault the IP was stolen if they didn't set it up correctly in the first place.
Have you tried any online customer support
? They should provide a step by step FAQ (Frequently Asked Question) page for their customers.
Look here for reviews of other Cable ISP's
I'm not sure it will help, but another resource for you is theCOAX: The Cable Modem User Online Resource
Or you could look for web sites with possible info regarding theSB3100, the Macintosh, & troubleshooting
Here is an article regarding one person's saga with comcast
There is reference to comcast's proxy here
As uniform as set up should be, it's still customized to the provider which makes it difficult to troublshoot without someone who knows exactly how their end is set up. Sometimes their competitors seem to tell you more about the company than the company itself!
Have a little patience. Browse the sites above. Even though it's a hassle, you can always switch carriers if you have to but once it's working, you'll be home free.
In the meantime you can arm yourself with as much information as you can find.
You can always browse a bookstore, see if you can thumb thru a Macintosh Bible or similar reference book with information on cable modems.
You could try posting your questions at places like AskMe.com under the category: Home > Technology & the Web > Computer Networks > Online Services & ISPs
Or try posting your question at cable modem troublshooting forums
or newspapers like The Washington Post
I hope this helps a little.
[ July 10, 2001: Message edited by: cchiu ]