Earlier quoted context omitted.
That's all well and good, but you need to raise that with your IT department if it is an inconvenience rather than complaining to us. It seems odd that github would be blocked especially given HN isn't unless your company has some sort of pathological fear of accidental IP dilution, so perhaps it is a mistake that will be quickly corrected once pointed out?
my coworker's previous employer blocked all code-sharing and question-and-answer sites for programmers because of a pathological fear of accidental IP dilution. it's a real thing.
That it is, although what they end up doing is making people work on their work machine as well as their cellphone. Source: me, working for a defense contractor with the same insane rules, but no "hand in your phone" rules on entry.