In article <yam7741.1605.132995504@mailhost.portal.ca>,
	"B. Bogart" <bbogart@iname.com> writes:
> will others be able to telnet into my site?

Yes, they will. See "man 5 hosts.allow" and "man 5 ipf" how to prevent that.

> do i need to run the DNS server in order to be able to telnet to
> sites that i do not have an IP address for?

No, you can put your provider's DNS servers into "/etc/resolv.conf".

-- 
Matthias Scheler                                http://home.owl.de/~tron/