Here's my problem. From work, users cannot access a website for work related activities. About a month ago the site just goes off line, no big deal happens all the time. Weeks go by and still not on line (ECommerce) That's strange. I call the company rep and he assures me the site is, and has been, up and running fine.

So I trace the site and the trace bombs at the companies isp. I contact the ISP and they say that the last address I hit is the public side of the eCommerce site.

So I contact the site rep and have him forward the tracert and other conversations I've had with their ISP to his tech department.

Now they can ping me fine and we can send and receive email fine, so besides some sort of black list, what else can be blocking this traffic?