Hi,

There's my home network topology:

Internet > dlink router > linux server

So I've signed up on free domain website, so assume that my address is test.domain.com
I've configured port forwarding on the router. I installed mail server with squirrelmail and i wanna that i can check my email on mail.test.domain.com. So how i understand i need to setup apache virtual host? Do i need to install DNS on my linux server? Explain howto implement that please?

Thanks

If you have only one domain that you will host on your machine, you do not need to deal with Virtual Hosts. That facility is designed for use when you have several different domains that all are hosted on a single server. The minimum you will need to do is to edit the file /etc/httpd/conf/httpd.conf to reflect where the website data lives on your server.

Likewise, if you have an assigned DNS name for your domain and some DNS server somewhere is currently resolving that name to an IP address, you do not need to run a local DNS server (it is called named) on your local machine. You might want to do so in order to improve the responsiveness of DNS lookups, but it is not necessary to get started.

Well I've registered another domain mail.test.domain.com and configured apache virtual hosting section and it works