Yes, because the firewall you are using employs the use of NAT. The external (DMZ) 
hosts cannot penetrate the firewall and access internal (hidden and probably 
unregistered addresses) without mapping a legal (registered) address to an internal 
(hidden) address . If you could telnet into your network from outside NAT would not be 
working very well. :) Oh, by the way, make sure that port 23 (telnet) is allowed 
inbound for the host or particular hosts that you need to telnet to. Like I said 
though, map a registered address to one of you internal hidden addresses first.

>>> Bogdan Moldovan <[EMAIL PROTECTED]> 04/15 1:46 AM >>>
Hy guys ... I need your help... please advise me


                INTERNET
                      |
                      |
                      |
                --------------------------
                |   PIX                 |
                |               |
                |               |-----------------------
193.230.160.128/193.230.160.224 (DMZ)
                -------------------------
                        |
                        |
                        |
                        |
                Internal zone
                10.0.0.0/255.0.0.0


I can make NAT form inside to dmz and I can telnet from inside to a machine
in the dmz, but I need the other way too... I can not telnet from dmz to a
machine in the inside zone.! Any ideea why?

Thank you very much
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