User guide

Proxy Settings
144 Firebox X Edge e-Series
Deny unsafe file name patterns
If you want to deny certain file name attachments, select the Deny unsafe file name patterns check box. This
is a list of file names or types that you want the proxy to block. Use the asterisk (*) as a wildcard character. For
example, if you want to block all MP3 files, type
*.mp3. If you read about a vulnerability in a LiveSecurity
Service Alert that affects PowerPoint files and you want to deny them until you install the patch, type
*.ppt.
About the HTTPS proxy
HTTPS (Hypertext Transfer Protocol over Secure Socket Layer, or HTTP over SSL) is a request/response protocol
between clients and servers used for secure communications and transactions. HTTPS is more secure than
HTTP because HTTPS uses a digital certificate to encrypt and decrypt user page requests as well as the pages
that are returned by the web server. The HTTPS client is usually a web browser. The HTTPS server is a remote
resource that keeps or creates HTML files, images, and other content.
By default, when an HTTPS client starts a request, it establishes a TCP (Transmission Control Protocol)
connection on port 443. Most HTTPS servers listen for requests on port 443. When it receives the request from
the client, the server replies with the requested file, an error message, or some other information.
To enable the SMTP proxy, follow the steps in Enable a proxy
. Then, if you choose, edit the proxy definition as
described in Add or edit a proxy policy
.
You can set rules that filter traffic based on IP addresses, network addresses or host ranges. For information
about these settings on the Outgoing tab, see Set access control options
.
On the Settings tab you can change the Idle connection timeout. This setting controls how long the HTTPS
proxy waits for the web server to send the web page. The idle timeout makes sure that the proxy can use the
network resources after the timeout expires. The default value is 10 minutes.