I know this isn't the answer you want to hear, but I don't think priming and painting will hide the tape. 

Before you apply any more primer, I'd add another thicker coat of mud. Slather on the mud thick first - it doesn't have to be smooth. Then smooth it out by angling your 12" knife so it's almost parallel with the drywall as you drag it along the surface. You'll have to press fairly firmly in order to avoid air gaps appearing in the thick coat you're smoothing out.

You may have to get a feel for it. If you push too hard and can see the tape again, redo that section until you get it just right.

Wait for the thicker coat to dry, then sand the edges as smooth as you can get them. Very carefully/lightly sand over area covering the tape if you didn't get it quite smooth. You may need to do a second coat along both sides of the thicker coat to make it join the drywall surface smoothly.

Drywall - final joint compound coat
I was using Pfsense for a while and recently replaced it with SonicWall TZ200.

What I miss now is a Bandwidth or usage monitoring like BandwidthD to monitor IP wise traffic. 
How can I do this through SonicWall TZ200 or some other software?
I installed BandwidthD on my local machine. It works perfect, but I doubt that it shows only the traffic from and to my system.
