• Upload status and data trickling
• Handoff host
Data processing
Table 165 Option definitions
Option
Definition
Enable client
messages
Configure client messages that are generated by the appliance and seen by users
who connect to the appliance using FTP. The messages prevent FTP downloads
timing out, and are available in Explicit Proxy mode, or in transparent modes when
connecting through the appliance’s proxy.
Help message
Specifies the help message that is displayed when a client sends an FTP request
for help to the appliance.
The message must be in plain text and US-ASCII-compliant.
Welcome message
Specifies the welcome message that a user sees when connecting to the appliance
using FTP.
The message must be in plain text and US-ASCII-compliant.
Keep alive interval
Specifies how often to send the keep-alive command.
Default value is 60 seconds.
Keep alive command
Specifies a “keep-alive” command to prevent the connection between the appliance
and the onward network device from timing out when the appliance is scanning
large files.
The appliance repeatedly sends this command to that device.
Default command is SYST.
Denied commands
Specifies FTP commands that the appliance does not accept. (Advanced setting.)
Download status and data trickling
Table 166 Option definitions
Option
Definition
Permit downloading
You can configure the appliance to start downloading (data trickling) the file to
the client before the whole file has been received from the server and scanned
by the appliance.
For data downloads
Specifies how the appliances handles FTP downloads.
Default values are:
Permit downloading
— Yes.
Scan the data
— Yes.
Block 8 bit data in ASCII mode
— No.
Block 8 bit data in ASCII
mode
When selected, blocks some types of transfer.
FTP allows data to be passed between computers in two modes — binary and
8-bit American Standard Code for Information Interchange (ASCII). Binary is
consistent across computer platforms, so its data can be scanned effectively.
However, 8-bit ASCII can contain different character codes and formatting,
depending on the computer systems in use, so viruses can be concealed within
its data.
Overview of Web features
Web Configuration
176
McAfee Email and Web Security Appliances 5.6.0 Product Guide
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