I am on my Kultiran lvl 68 and the Portal worked before. In the blasted lands the Green portal that takes you to hellfire doesn’t work you just fly through it. A horde player and an another alliance player had the same problem.
Portal isn’t working from the blasted lands side either. Bunch of people here not making it through.
This is a known issue right now. You can check that link out for your options to get this resolved.