https://github.com/aziraphale/routeros-dns-adblock

Just in case anyone else runs across this in a google search like I did. Be sure to read the "ReadMe" as always, but it works out great for me on my RB450G.

Thanks for the link and update

Hello! I've noticed something interesting in your rules. [...] Nice find! Like you've said it's only in the comments. I see also that the rule use the correct value of 500kB -> connection-bytes=500000-0 Then we simply need to change the comments ;-) BTW on that same line there is also a little typo...