I have a home server, on which I have installed Apache, and several other applications that have a Web GUI (JDownloader, Free Download Manager).

In order to access each of these apps (whether be it from the local network or the Internet), I have to enter a different port, e.g.,

http://server:8085 or http://xxxx.dyndns.org:8085 for Apache  
http://server:90   or http://xxxx.dyndns.org:90   for FDM  
http://server:8081 or http://xxxx.dyndns.org:8081 for JDownloader

I would like to be able to access them using sub-domains, e.g,

http://apache.server      or http://apache.xxxx.dyndns.org      for Apache,
http://fdm.server         or http://fdm.xxxx.dyndns.org         for FDM,
http://jdownloader.server or http://jdownloader.xxxx.dyndns.org for JDownloader

First of all, would it be possible like I want it, i.e., both from LAN and Internet, and if yes, how? Even if it's possible only for Internet, I would like to know how to do it, if there's a way.