This may be of assistance:
It's a thread about the KNOX Warranty, etc.
http://xdaforums.com/showthread.php?t=2477209&page=7
I read the thread about using TR to Root NF6 after you have NE6.
Seems to work.
I had ANCH which I Towelrooted.
I then Odin'd NE6 Samsung Full Stock Tar and Towelrooted.
I then installed SuperSU.
KNOX Counter is still at 0x0 :good:
I'll wait on NF6. Towelroot may be able to root NF6 in time.
Okay you want root on the NF6 firmware without tripping knox then use this method.
http://xdaforums.com/showthread.php?t=2790292
Someone will take it and rewrite it into a easy guide / step by step. At least this way you get rid of the spam that comes on the phone, get root and is able to adjust the dns settings to compensate for internet issues with apps / facebook and skype.