WatchGuard Firebox System 7.0 User Guide

Chapter 9: Configuring Proxied Servicesinside.salesdept.bigcompany.com, which would become thepublic address bigcompany.com.1 Click the Masquerading tab.The SMTP masquerading information appears, as shown in thefollowing figure.2 Enter the official domain name.This is the name you want visible to the outside world.3 In the Substitute the above for these address patternstext box (to the left of the Add button), type the addresspatterns that are behind your firewall that you wantreplaced by the official domain name. Click Add.All patterns entered here appear as the official domain nameoutside the Firebox.4 In the Don’t Substitute for these address patterns textbox (to the left of the Add button), type the addresspatterns that you want to appear “as is” outside thefirewall. Click Add.5 Select the checkbox marked Masquerade Message IDsto specify that message IDs in the Message-ID andResent-Message-ID header fields are converted to anew ID composed of an encoded version of the originalID, a time stamp, and the host name entered in thedomain name field described in step 2.148 WatchGuard Firebox System