That is how portmap works. You map a port on device A to point to
device B. All communication to the outside appears to come from the
device doing the map.
Can you create a VPN between the controller side and the outside service
so it looks like it is on the same network?
On 5/6/2011 4:41 PM, Bill Prince wrote:
We have a client that has a new HVAC system (Delta Controls). It uses
a controller that can only talk L2. The HVAC guys for the client
asked me to set up a portmap for port 47808.
I did this, but it appears that the MT portmap substitutes the
original (public) source address with the router's internal gateway
address.
So the device replies with it's own private address, which gets sent
back to their monitoring software, and when they reply to the private
IP, it gets lost.
So they are asking me to mangle the portmapped packets to stick in the
original public IP, to fool their controller.
I have no clue how to do this.
--
Scott Reed
Owner
NewWays Networking, LLC
Wireless Networking
Network Design, Installation and Administration
Mikrotik Advanced Certified
www.nwwnet.net
(765) 855-1060
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