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On 24/11/10 10:04, Gavin McCullagh wrote:
>> On Wed, 24 Nov 2010, Brendan Halpin wrote:
>>> I have two machines, A in the DMZ and B in the protected part of the
>>>> B can see A, but A can't see (ping, etc) B unless B has initiated a
>> connection (e.g., A can respond to B's HTTP requests).
>>>> Is there a secure way to make a more general connection from B to A so
>> that A can "see" B in a wider sense (ssh from A to B, read B-mounted
>> samba share from A, etc.).
While all the suggestions given will work, the easiest way to ensure
machine A and B can communicate is by moving them to the same network;
in particular taking machine A out of the DMZ and putting it into the
same network machine B is in.
If this is not a possibility, you should consider very carefully the
reasons that machine A is in a DMZ and what protection this affords you.
Then, evaluate this in line with your requirements for connectivity
between the two hosts.
While SSH tunnels, changed firewall rules, IPSec VPN will all achieve
connectivity between the machines, make sure that you are not subverting
the very reason the DMZ was put in place.
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