How do operate Nemx SecurExchange behind a active firewall or proxy gateway?
Background:
Nemx SecurExchange in some monitoring activities requires the IP address of the SMTP server sending the message. When an active monitoring firewall or proxy gateway is in front of your Exchange Server and hence in front of Nemx SecurExchange, the IP address of the session is that of the firewall or proxy gateway and not that of the original SMTP server transmitting the message. Also, in a a firewall or proxy environemnt some of the header information of messages may be lost or modified by the firewall or gateway. Some components of Nemx SecurExchange may see incorrect data in the header of the message and the IP address of the sender. This can result in missed spam detection.
Nemx SecurExchange for Exchange can operate behind a firewall or gateway with no loss of functionality. Do do so requires intructing Nemx Power Tool to look at the session information behind the firewall.
Instruct Nemx SecurExchange to look infront of a fiewall or proxy gatway:
Run the Windows Registry Editor program (regedit.exe)
Navigate to the following registry key
Exchange Server 2003 / 2000:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NEMX SECUREXCHANGE\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NEMX POWER TOOLS FOR EXCHANGE 2000\Parameters
Exchange Server 5.5
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NEMX SECUREXCHANGE\Parameters
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NEMX POWER TOOLS FOR MS EXCHANGE SERVER\Parameters
Add a new DWORD value
Type: DWORD
Name: Received Line
Value: X, where X is the number of firewalls, proxies, or gateways infront
of Nemx SecurExchange
Save the entry in the registry
Restart the Nemx SecurExchange service
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