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Chapter 9: Configuring Proxied Services
140
WatchGuard Firebox System
Blocking email attachments
You can use two methods to block email attachments.
Either allow only save content types or deny file name pat-
terns. These two methods can be used together to further
protect your network from malicious email attachments.
Allowing safe content types
MIME stands for Multipurpose Internet Mail Extensions, a
specification about how to pass audio, video, and graphics
content by way of email or HTML. The MIME format
attaches a header to content. The header describes the type
of multimedia content contained within an email or on a
Web site. For instance, a MIME type of "application/zip" in
an email message indicates that the email contains a Zip
file attachment. By reading the MIME headers contained in
an incoming email message, the Firebox can strip certain
MIME types and admit only the types you want. You
define which types of attachments are admitted and which
are denied by using the Firebox’s HTTP and SMTP proxies.
From the
Incoming SMTP Proxy Properties
dialog box:
1
Click the
Content Types
tab. Specify whether you
want to block certain file-name patterns in email
attachments by selecting the checkbox marked
Allow
only safe content types and block file patterns
.
Summary of Contents for Firebox X10E
Page 1: ...WatchGuard Firebox System User Guide WatchGuard Firebox System ...
Page 12: ...xii WatchGuard Firebox System ...
Page 44: ...Chapter 2 Service and Support 22 WatchGuard Firebox System ...
Page 61: ...Cabling the Firebox User Guide 39 ...
Page 68: ...Chapter 3 Getting Started 46 WatchGuard Firebox System ...
Page 78: ...Chapter 4 Firebox Basics 56 WatchGuard Firebox System ...
Page 156: ...Chapter 8 Configuring Filtered Services 134 WatchGuard Firebox System ...
Page 182: ...Chapter 9 Configuring Proxied Services 160 WatchGuard Firebox System ...
Page 220: ...Chapter 11 Intrusion Detection and Prevention 198 WatchGuard Firebox System ...
Page 242: ...Chapter 12 Setting Up Logging and Notification 220 WatchGuard Firebox System ...
Page 256: ...Chapter 13 Reviewing and Working with Log Files 234 WatchGuard Firebox System ...
Page 274: ...Chapter 14 Generating Reports of Network Activity 252 WatchGuard Firebox System ...