Internal Machines and DNS

[Kevin Darcy]

Depends on what protocols you're dealing with. SMTP has relaying
capabilities, so you can potentially play some games there by DNS-deluding
the relays. HTTP has the Host: header, which in DNS terms implies only
aliasing, but in web servers and proxies, lends itself to "virtual server"
tricks. But other protocols, like telnet, FTP, POP3, etc. don't have either
of those, so all you have to go on is the port on which the clients are
connecting. Looks like port forwarding may be your only choice for those.


- Kevin

jfbertrand at bigfoot.com wrote:

> Hi all,
> I have a registered domain name with only one static ip and would like
> to use the prefix like (mail.yahoo.com vs. www.yahoo.com) to redirect to
> an internal ip(192.168.1.15).
>
> I'm running on a linux box with masquerading running(NAT).  At first I
> thought it could be possible but now I'm starting to doubt.  I don't
> think it would work but please let me know if there is a way other then
> port redirect from my server.