Fortinet 100A - Manual (Page 306)

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01-28007-0068-20041203 Fortinet Inc.
config antivirus service imap Antivirus
How file size limits work
See “How file size limits work” on page 301 .
Example
This example shows how to set the maximum file size that can be buffered to memory
for scanning at 25 MB, the maximum uncompressed file size that can be buffered to
memory for scanning at 50 MB, and how to enable antivirus scanning on ports 143
and 993 for IMAP traffic.
config antivirus service http
set memfilesizelimit 25
set uncompsizelimit 50
set port 143
set port 993
end
This example shows how to display the antivirus IMAP traffic settings.
get antivirus service imap
This example shows how to display the configuration for antivirus IMAP traffic.
show antivirus service imap
antivirus service imap command keywords and variables
Keywords and
variables Description Default Availability
memfilesizelimi
t Set the maximum file size that can be buffered
to memory for virus scanning.
The maximum file size allowed is 10% of the
FortiGate RAM size. For example, a FortiGate
unit with 256 MB of RAM could have a
threshold range of 1 MB to 25 MB.
Note: For email scanning, the memfilesizelimit
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
memfilesizelimit.
10 (MB) All models.
port
Configure antivirus scanning on a
nonstandard port number or multiple port
numbers for IMAP. You can use ports from the
range 1-65535. You can add up to 20 ports.
143 All models.
uncompsizelimit
Set the maximum uncompressed file size that
can be buffered to memory for virus scanning.
Enter a value in megabytes between 1 and the
total memory size. Enter 0 for no limit (not
recommended).
10 (MB) All models.