NAT for multiple IPs

[torusJKL]

Hi all

I read about ebox and searched the manual but still have a question regarding IP forwarding in a LAN:

I have a ADSL connection with several static external IP addresses.
The computer I want to use has one NIC and several virtual machines with static IPs that should be available through a external IP.

The ADSL router can forward all incomming traffic on a specific port to a specific IP.
E.g.
All external IPs:22 --> 192.168.1.100:22
All external IPs:443 --> 192.168.1.100:443

Is it possible with the above configuration to forward to a internal IP according to the external IP?
So that if a connections comes into the ADSL router on IP 78.31.123.100 that ebox forwards this to 10.0.0.100 and if a connection comes into the ADSL router on IP 43.42.189.234 that ebox forwards this to 10.0.0.200?

If this is not possible what hardware do I need to forward to internal IPs?

Many thanks for your ideas and support!

Edit:
My setup looks like this:

+-----------+
 | Internet |
+-+--------+
     |
     | Multiple IP's
+-+--------------+
 | DSL Modem |
+-+--------------+
     |
     | 192.168.1.100
+-+-------+
 | ebox    |
+-+--+--+
     |    |
     |   +-----------+
     |                     |
+-+-------+   +-+-------+
| Server1 |     | Server2 |
+----------+   +-----------+
10.0.0.100    10.0.0.200