I noticed some changes in the log in on this site recently, and since then I am no longer able to log in to Super User, or Stack Exchange. I only have a Stack Exchange account.

When trying to log in from Stack Exchange, the only options that appear are:  "Click here to sign up" and "Enter your OpenID"

From the Super User login window, everything seems to appear but the "Login" button is inactive (the other login options act the same - including the Facebook and Google login). I can press it, but nothing happens. 

At my company there are some restrictions and a strong firewall. I do not know all of the rules and security policies in place.

I have local administrator account but I do not have access to the domain. I am using Internet Explorer. I would also prefer fixing the problem myself (if possible) instead of contacting the department who made the security policy.

How can I troubleshoot this and get a workaround?