Setting up your Wiki site is easy you need to create a web application with the Wiki site template .
To access the site internally you need to provide the URl of the web site to the users and they can access directly .
You can also change the url using Alternate Access mappings
However if you want to access the site exteranlly you need to have a PUblic IP which can be resolved to your sharepoint site . Once that is done Users can access your site using the port 80 or Host header .
Feel Free to get back to me as i dont know the level of understanding you have on Sharepoint .
Regards - Sushant Khambekar - MCTS Please Mark As Answer if my post solves your problem or Vote As Helpful if a post has been helpful for you. Sharepoint Admin - Moss 2007 , Sharepoint 2010 http://www.sharepointdirect.blogspot.com/ http://sharepointtechs.wordpress.com/