Fortinet 100A - Manual (Page 296)

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01-28007-0068-20041203 Fortinet Inc.
Virus list Antivirus
Config
Config displays a list of the current viruses blocked by the FortiGate unit. You can also
configure file and email size limits, and grayware blocking.
This section describes:
• Virus list
• Config
• Grayware
• Grayware options
Virus list
The virus list displays the current viruses blocked in alphabetical order. You can view
the entire list or parts of the list by selecting the number or alphabet ranges. You can
update this list manually or set up the FortiGate unit to receive automatic updates
daily or whenever required. To manually upload a virus list update see
“Changing unit
information” on page 29 . To find out how to use the Fortinet Update Center, see
“Update center” on page 118 .
Figure 157:Virus list (partial)
Config
Oversize threshold configuration refers to the size limits you can apply to scan files
and email in memory.
The maximum file size allowed in memory is usually 10% of the FortiGate RAM size.
For example, a FortiGate unit with 256 MB of RAM could have a memory oversize
threshold range of 1 to 25 MB. The range for each FortiGate unit is displayed in the
web-based manager as shown in
Figure 158 .
Note: For email scanning, the oversize threshold refers to the final size of the email after
encoding by the email client, including attachments. Email clients may use a variety of encoding
types and some encoding types translate into larger file sizes than the original attachment. The
most common encoding, base64, translates 3 bytes of binary data into 4 bytes of base64 data.
So a file may be blocked or logged as oversized even if the attachment is several megabytes
less than the configured oversize threshold.