Linux - DNS/WWW/POP

[Leonard Leblanc]

I'm interested in setting up a Linux Box to host my web-site and network.  I've started reading the appropriate how-to's (Security, DNS, NIS, Firewall, etc.) and am just a little unsure about one thing. BTW: running debian of course.. :)   Can I have one Linux box working as my name server, web server, proxy server, mail server, and ftp?   Thanks, Leonard Leblanc