I have a login safe application and it has hundreds of users. WordPress is a separate module of it and only used for blogging purpose [no other usage]. Both using the common database. The blogs are not for public but only for our users.
Recently I am getting spam comments to our blogs and I am worried about the blogs.
How I can make the WordPress totally private for our application users. All our users do not have WordPress login but are allowed to check the blogs and post their comments.