facebookfacebook-pages
I have setup a page for my company and restricted posting to admins only, but when an admin posts something, the option to Like or Comment is visible for everyone, including those who are not "liking" the page. This means anyone can "like" or "comment" on posts.
Is there a way to disable this?
You can "like" a Facebook page as a page you administer. For this you need to log-in your account - Then go to the page you'd like to "like" as a page - scroll down until you see the option to “Add to My Page’s Favorites” at the very bottom on the left hand side.
Now click this option and you’ll see a pop-up window, where you can choose from the pages you admin.
That's it.
Facebook does not allow you to disallow comments on your Timeline. This article has a quote from a Facebook employee stating:
We think these policy changes support consistency for the Facebook Pages product and encourage an authentic dialogue between people and businesses on Facebook.
Moderation is the only way to accomplish what you seek. An All Facebook article has a better writeup on this (without the quote).
Best Answer
Facebook's quest to make the world more open means that logged in Facebook users are allowed to comment and like everywhere. So, no, you aren't able to block this behavior.
The only other option you have is to make a closed group, but it would be hard for people to find the page with this method.