I recently implemented a way to limit access by IP range on specific blogs on WordPress MU. As you know, WordPress MU uses Apache Rewrite engine to rewrite URLs. For instance, you have a blog on WordPress MU called “intranet”. Apache Rewrite takes the “intranet” string in the URL and automatically rewrites it as a value in the PHP script. A side effect to Apache Rewrite is that “Directory” .htaccess parameters don’t work. So, if you wanted only your company IPs to access an internal blog, you will need to use Apache Rewrite parameters instead. For the solution, read on…

I attended WordCamp SF for the first time in 2009. There was some exciting news at the camp, especially with the news that WordPress MU functionality is going to get integrated with WordPress. This will be nice considering updates for WordPress MU are usually a month or so behind. What will this mean? Hopefully, it will bring a larger community in maintaining and adding new plugins for WordPress (MU). The question will be whether it will be easy to convert an existing WordPress MU install over to the new WordPress. (Possibly WordPress 3.0?)

I have found a really useful plugin in Wordpress MU for making a blog private. Sometimes, committees need a way to share information away from home and they don’t want everything posted to be known by the world. Rather than using the “Password protect post” option, there is a way to only allow registered users that are members of the blog to view the post.

By default, the privacy options in Wordpress MU is limited to 1) Public, allow search engines 2) Public, don’t allow search engines.

http://wpmudev.org/project/More-Privacy-Options

This plugin adds functionality:
3) I would like my blog to be visible only to registered users from blog community
4) I would like my blog to be visible to registered members of this blog
5) I would like my blog to be visible only to administrators