Thank you all for responding, I figured out what the issue was. While setting up some new wireless extension devices, the Comcast Xfinity "xFi Advanced Security" was enabled, which claims to stop a variety of threats. After disabling it I can get to the website fine. I took a look through some logs and it looks like it was barfing due to HTTP Strict Transport Security (HSTS) not being enforced by your site. While I agree it's a good practice, I think it's a bit extreme. Hopefully other people will see this in the event they have an issue.
Thanks again for the generous discount!