http://domain.tld opens up panel login

[kilburn]

DNS simply resolves hostnames to IP's, so you can't "redirect" domain.tld -> IP_ADDRESS:8080 using it. What you probably did is set up your provider so their own web server redirects to IP_ADDRESS:8080, which actually works only for the default virtualhost. Example demonstration:

- Client enters http://domain.tld in his browser
- The browser connects to your.provider.ip.addr and asks for the index file of domain.tld
- Your provider's web server sends a redirect to your.own.ip.addr:8080
- The browser connects to your.own.ip.addr:8080 and asks for the index file of the default server, because it's connecting to an ip, not to a domain
- Your web server sends the default virtual host index file (the control panel)

As you can see, using this redirect to IP makes the client browser loose the domain information, so VirtualHosts on your own webserver will never work this way.