I have recently installed WAMPSERVER on my computer. I have all programs functioning properly and I am trying to allow my apache server to be accessed by outside computers (preferably with username and passwords assigned if possible)

I have done some searching but cannot find a proper way to set up port forwarding on my wireless Linksys router and make sure I do not mess anything up. I have read things about opening PORT 80 but, again I have not read anything about it with clarity. I am new at this

I appreciate any help.