Login fails inside company network

[mprusse]

I've got a strange situation that just started occurring within the last few months. Using a Macintosh computer I'm unable to login to LDS.org from within my company network. I can get to LDS.org just not Sign In. It works fine on a Windows computer and it works fine on my Mac outside my company network. I've tested it with several other Macs at work and they also fail. My company recently installed a Palo Alto enterprise filewall system but I don't know the details. And since I can log into LDS.org from a Windows machine Palo Alto cannot be blocking the site. But Windows logins do seem to lag as compared to when logging into LDS.org outside of our Palo Alto installation.

Any thoughts? Thank you!