Fortinet FortiGate Series Administration Guide

Antivirus tasks AntiVirus
FortiGate Version 4.0 MR1 Administration Guide
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Figure 301: Order of operation
Antivirus tasks
The antivirus tasks work in sequence to efficiently scan incoming files and offer your
network unparalleled antivirus protection. The first four tasks have specific functions, the
fifth, the heuristics, is to cover any new, previously unknown, virus threats. To ensure that
your system is providing the most protection available, all virus definitions and signatures
are updated regularly through the FortiGuard antivirus services. The tasks will be
discussed in the order that they are applied followed by FortiGuard antivirus.
File size
This task checks if files and email messages exceed configured thresholds. It is enabled
by setting the Oversized File/Email option under Firewall > Protection Profile > Antivirus to
Pass.
For more information, see “Anti-Virus options” on page 489.
Start
FTP, NNTP, SMTP,
POP3, or IMAP traffic
after web filter spam
checking.
File or message
is buffered
Oversized
file/email
action
Pass
Block
File type
match?
File/email
exceeds
oversized
threshold
Yes
No
Block
file/email
File
Pattern
Match?
Matching
file pattern
action
Block
Allow
File/email
exceeds
oversized
threshold
Yes
No
Pass
file/email
No
Yes
AV scan
detects
infection?
Matching
file type
action
No
Yes
Allow
Block
Pass
file/email
Yes
No

Fortinet FortiGate Series Specifications

General

Model	FortiGate Series
Category	Firewall
Throughput	Varies by model
Interfaces	Varies by model
Concurrent Sessions	Varies by model
VPN Support	Yes
High Availability	Yes
Firewall Throughput	Varies by model
VPN Throughput	Varies by model
IPS Throughput	Varies by model
NGFW Throughput	Varies by model
Threat Protection Throughput	Varies by model
New Sessions per Second	Varies by model
Power Supply	Varies by model
Security Features	Firewall, IPS, Application Control, Web Filtering, Antivirus, VPN
Virtual Domains	Yes
Form Factor	Desktop, Rackmount