Target Skills:

Describe the messaging roles of Internet Relays and Firewalls.
 

 
     

Internet Connectivity

If you are sending messages to and from the internet, you need to protect your messaging and directory information from unauthorized access from the outside world. You can do this through the use of an Internet Relay and a Firewall.
 

Internet Relay

One way to protect your messaging system is by setting up an Internet Relay, a single point of contact for the outside world that simply sends all your incoming messages across your Firewall to a specific messaging server, called the Inbound Messaging Hub.  The Inbound Messaging Hub then does the Directory queries to find out where to send the message. The Internet Relay sits in the "De-Militarized Zone" (DMZ) of the firewall (between the external and internal walls of the firewall), and has no access to or information about any other servers other than the Inbound Messaging Hub. 

Firewall

A security system that protects the messaging network and network in general from unauthorized access.  All internet traffic (to and from) has to passes through the firewall and its controls, allowing greater network security.  The Firewall is set up to only allow incoming messages from the Internet Relay to the Inbound Messaging Hub.
 
 
 
 
     

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