Location of Apache Ports Configs

I cannot find the location of any apache config files. I specifically need one dealing with ports. What I am trying to do is change the port my site is hosted on, or at least redirect it. Where would these files be found in?
Arch Linux- xampp 1.7.3
Installation directory: /opt/lamp/
Arch Linux- xampp 1.7.3
Installation directory: /opt/lamp/