Everyone at my company headquarters who goes to https://secure.verizon.com/signin is getting this error. It started recently and seems to be tied to the source IP address of the traffic to that site, as access works fine from any other ip address than the one we present to the Internet from headquarters (using the same computer, same browser, etc). My guess is some sort of blacklist although the Live Chat agent said Verizon does not do blacklisting.
There are many articles on this forum about this error but I don't see any real solution. Has this issue ever been resolved?