Hi.
> > Is it possible to set up the equivalent of a LAN with a DMZ and
> > a "secure" part, all within a single physical machine (with a
> > single network adapter)?
>
> yes, it is possible, but it does only make limited
> sense if you are concerned about security ...
(1)
What is the exact difference, security-wise, between a single host
and two hosts physically separated by a network wire (assuming that
the Internet access point is secured by same SW (netfilter) firewall
rules)?
> sorted by increasing security IMHO:
>
> - single host, firewall, services, enduser, 1nic
> - single host, firewall, vservers (services), 1nic
> - single host, firewall, vservers (services, enduser), 2nic
> - separate firewall, 2nic (services), 2nd-host enduser
> - separate firewall, 2nic, 2nd-host (services), enduser
> - separate firewall, 2nic, 2nd-host vservers (services), enduser
>
(2)
Is the following what you mean by the last configuration summary given
above (the most secure):
Internet <----> [ (nic1) H1 (nic2) ] <----> [ (nic3) H2 ]
So, H1 is the firewall host, and H2 the internal, secure, host where
vservers run.
(3)
If (2) is the actual setup, can it be arguably considered as secure as
a LAN and DMZ, physically different, like the following:
[ (nic2) ] <----> [ (nic3) H2 ]
Internet <----> [ (nic1) H1 ]
[ (nic4) ] <----> [ (nic5) H3 ]
where H2 (DMZ) would run vservers for applications like a web server,
and H3 (secure LAN) would run vservers like a database.
(4)
With a physical setup as in (2), is it possible to use the vserver
capacity in order to "simulate" (3)? [E.g. to have 2 "virtual"
subnets inside H2, one of which would be the DMZ.]
I've read the previous thread about "DMZ and vserver", but I didn't
get what was the final proposal (physical setup, virtual zones...)
An actual example would be welcome.
Thanks,
Gilles
P.S. I can't seem to be able to subscribe to the ML, I get a
"Bug in Mailman version 2.1.4 -- We're sorry, we hit a bug!"
page. [Yesterday, I sent a message to the list owner.]
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