That was very good work. Well done.

Have you contacted Comcast about this?

Such a message can be generated by a filter protecting the server against misuse. It is possible that the IP you get when you use Comcast is currently in a such a blocklist.

KAMCOBILL said

I'm getting this reference number on one like it on several different web sites. I have been reading similar problems but don't see a fix. I get it at shopping sites & bank sites. I think I narrowed it down to one thing. After several of hours of trying different things: Using Mozilla Firefox & Microsoft Edge and having the same problem accessing web sites, I decided to switch from My Comcast to My Frontier Internet Provider. This solved the problem. When going to back to comcast, it return to the problem. Hope this helps Some one, and hope someone can help me figure out why?

Comcast is sending new gateway Modem. We'll see what happens. I'll keep you posted.