Blocking oversized files and emails | Antivirus protection |
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3Type the new pattern in the File Pattern field.
You can use an asterisk (*) to represent any characters and a question mark (?) to represent any single character. For example, *.dot blocks Microsoft Word template files and *.do? blocks both Microsoft Word template files and document files.
4Select the check box beside the traffic protocols for which you want to enable blocking of this file pattern.
5Select OK.
Blocking oversized files and emails
You can configure the FortiGate unit to buffer 1 to 15 percent of available memory to store oversized files and email. The FortiGate unit then blocks a file or email that exceeds this limit instead of bypassing antivirus scanning and sending the file or email directly to the server or receiver. The FortiGate unit sends a replacement message for an oversized file or email attachment to the HTTP or email proxy client.
Configuring limits for oversized files and email
To configure limits for oversized files and email
1Go to
2Type the size limit, in MB.
3Select Apply.
Exempting fragmented email from blocking
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A fragmented email is a large email message that has been split into smaller messages that are sent individually and recombined when they are received. By default, when antivirus protection is enabled, the FortiGate unit blocks fragmented emails and replaces them with an email block message that is forwarded to the receiver. It is recommended that you disable the fragmenting of email messages in the client email software.
To exempt fragmented emails from automatic antivirus blocking
Caution: The FortiGate unit cannot scan fragmented emails for viruses or use file pattern blocking to remove files from these email messages.
Enable Pass Fragmented Emails for IMAP, POP3, and SMTP traffic in a content profile.
Select
Select a content profile that has Pass Fragmented Emails enabled for the traffic that you want the FortiGate unit to scan.
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