We have 1 Public IP Address from our ISP. For example the public ip address is : 188.8.131.52
Currently locally we have PHP application run on our local server, that could be access on internet by using URL : application1.domain1.com It's using port 80. We're using IP Forwarding in our modem router.
My question :
1>We have another PHP application that run on different local server from application1. Can we set that it could also access on internet by URL : application2.domain1.com Using same port 80?? Or the only way to do that by having another public ip address?
2>if it's not possible, can we access it using different port, but by using subdomain name also, for example : application2.domain.com:81 ??