There are a couple of areas of concern with the security of the operation of the Faximum Messaging Server.
Controlling Access to the Fax Delivery Services of the FMS
Since the FMS can incur long distance phone charges when delivering messages by fax it is important to prevent unauthorised users from using your FMS to delivery their messages.
The details of how to configure the FMS to limit access to the FMS message delivery functions is described in "Access, Controlling" on page 26.
It is important to understand that it may be possible in certain circumstances for unauthorised users to fool the FMS into thinking it is handling a message from an authorised user. For example, if you configure the user database to access email from any IP address (or a wide range of IP addresses) then an unauthorised user can easily forge the name of an authorised user in the headers of his email message and fool the FMS system into accepting the message. Even if you limit messages from certain IP addresses it may be possible for sophisticated criminals to spoof your system.
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