I just had an issue at my residence (Verizon FiOS customer) where I could connect fine to one virtual IP on a Juniper SA4000 but couldn't connect to a different one. It seems that every PC in my house riding the Verizon FiOS 50/20 connection had the same issue. I had no problem connecting from my Motorola Droid 3 over Verizon Wireless... I even ran a packet trace and the PC was getting the proper redirection from HTTP to HTTPS but was sending a FIN,ACK which generated a RST from the Juniper SA4000.
In the end I had to reboot the Verizon Actiontec router and now everything is working again.