Are you looking to learn more about OS X server or how to configure a particular service? For most basic configuration questions, we can assist or perform them for you. There are other resources that go further in detail into configuration and administration of OS X server. This link to Apple’s Max OS X Server Guides will link you to PDF files that cover specific topics. Everything from iCal server, to user management, to the wiki server.
Also below is a link to an Apple Knowledge Base article containing common TCP/IP port numbers. This comes in handy when creating advanced firewall rules.