Everytime I try to create a subdomain with this combo, it simply says the page doesn’t exist. I have the subdomain directory created, so I’m not sure what I’m doing wrong. for example if I want
subdomain.domain.com, then
domain.com/subdomain will work, but
subdomain.domain.com won’t work.
Any insight?
Firstly you will need a DNS record for you subdomain. This can be a CNAME record if you just want the the subdomain to be an alias of the main domain (Canonical Name). If you want the subdomain to be hosted on a different IP address or server then you need a new A record.
From the sounds of it you want a CNAME record for your subdomain created in your DNS manager, and then you want to configure your web server to look at the host headers to map to the sub directory you created. How you go about this depends on the type of web server.