After I read 11 Reasons against no follow and Remove no follow from word press comments, I’ve decided to remove it. And now starting from today, anyone who comments to my blogs don’t have the no follow attribute again and the author who comments my blog will get to crawl able link. I think that’s the way how I will give a reward to my visitor

Here some tips to remove no follow attribute with plug in
remove-nofollow.zip.  Inside this archive, you will find remove_follow.php. Upload this file in wp-content/plug-in and then activate the plug-in in the Plug-in section of the Word press admin
or you use Do follow from semilogic.com

I’m using Manual Remove no follow without plug-in.

Here is the Step
1. Go to /wp-includes
2. Edit the file comment-template.php
3. At line 47 there is a code $return = “<a href=’$url’ rel=’external no follow’>$author</a>”;
4. Change the code to $return = “<a href=’$url’ rel=’external’ target=’_blank’>$author</a>”;
5. Save and you’re done