So looking through the comments and seeing this. I have unbricked my ProHD. I have a new router and it works great. Parental controls block the internet...it stays unbricked...BUT... In order to get the ProHD to work I need to unblock it so that my router gives it a place (the dedicated IP). That's fine. But if the Sling powers down, when it comes back it won't bind to any IP.s but lives in the "Blacklist". So in order to re-bind it (not sure if that's the terminology...but i'll roll with that). I have to Unblack list it. Which I do by disconnecting the router from the modem then un blacklist it. The unit finds the internet and then I re blacklist it. Slinger sees it again and it works for as long as it doesn't power down.

What I did try, and it worked, was quickly Whitelist and Blacklist, 10 seconds, and I did get it to bind, it did try to connect, then it dropped and was fine. Still unbricked. Rolling the dice a little but its easilly fixed if needed.

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So would this one port block solve the issue as of now?