On Fri, 9 Jan 2004, Scheldebouw wrote:
> It's a bit of a strange setup. The modem has an IP address (192.168.1.1)
> for management but is placed in bridged mode. The GNATbox receives an IP
> from the ISP via DHCP on the external interface. My internal subnet is
> 192.168.240.0/24.
> Now if I want to manage the modem I directly connect a laptop via 1:1 UTP
> cable but I would like to telnet to in from a PC in the internal network.
> If I need to renumber the internal subnet to 192.168.1.0/24 or give the
> modem a different IP that would not be a problem .
Sounds like the solution for you is to add a NAT Alias to the External
interface for the 192.168.1.0/24 subnet. Be sure to include the /24
netmask on the alias, since it's the first IP defined in that network.
If you have restrictive outbound filters, you'll also need to open up
access to the host..but if you have basic allow-all outbound filters, you
shouldn't have a problem.
After adding the alias, the gnatbox will know how to reach the
192.168.1.0/24 network and all hosts using the gnatbox as their gateway
will be able to reach the host. Traffic to the DSL modem will be NATed to
the alias, so if have access filters on the DSL modem you may need to
adjust them accordingly. No other configuration should be needed on the
DSL modem since it will see the traffic as on its local network.
...david
--
David Raistrick
Systems Administrator - Global Technology Associates, Inc
[EMAIL PROTECTED]
Disclaimer: All opinions expressed are the opinions of
David Raistrick, not necessarily those of GTA, Inc.
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