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Connecting to internal exchange using public IP via a mikrotik

Asked by cpoint-service in Network Routers, Networking Hardware Firewalls, IP Tables/IP Chains

Tags: mikrotik rb433ah exchange router routing

Good Evening,

My current situaion is as follows:

I have a customer on T1 with mikrotik RB433AH router with routeros 3.14 assigned a public IP. Inside the network is a windows server 2003 PDC using AD and Exchange.  The mikrotik has a wifi card that is bridged into the local network.  The PDC handles DHCP and DNS for the internal network.  The local domain is <company>.local

From the wifi we have flawless internet access, and can browse to http://192.168.1.254/exchange  and get the OWA login. When connecting to http://<companydomain>.com/exchange from the outside the network you also get the OWA login.

However, from inside the network on the wifi accessing http://<companydomain>.com/exchange returns page can not be displayed (timeout).


This is a known issue with many routers and is even brought up and addressed in this question:

http://www.experts-exchange.com/Hardware/Networking_Hardware/Routers/Q_23727459.html

Unfortunately when trying to implement the accepted solution to that question the winbox UI returns the following error where xxx.xxx.xxx.xxx is the public IP for the customer:

"Couldn't change NAT rule <192.168.1.0/24->xxx.xxx.xxx.xxx> - dstnat chain can not contain masquerade/snat actions (6)"
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