YOU MUST specify the IP address per IIS web site... (Can not use the "all unassigned")
Standard Port can BOTH be 80, but the SSL port should be different. A good Aux port for the second one is 8531 (Windows Standard)
http://technet.microsoft.com/en-us/library/bb632
I would recommend since it appears you are using a external IP to the server and then an internal 192.168 private ip the following...
202.179.49.??? To utilize port 80 and SSL 443
192.168.???.??? to utilize port 80 and SSL 8531 just make sure your router has that port forwarded. IF the ssl connection fails, then IF your router can redirect ports, have it redirect port 443 to 8531.
Hope that helps...