ZyXEL Communications 200 Series 用户手册
Chapter 28 Anti-Virus
ZyWALL USG 100/200 Series User’s Guide
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Since the ZyWALL erases the infected portion of the file before sending it, you
may not be able to open the file.
may not be able to open the file.
Notes About the ZyWALL Anti-Virus
The following lists important notes about the anti-virus scanner:
1 The ZyWALL anti-virus scanner can detect polymorphic viruses.
2 When a virus is detected, an alert message is displayed in Microsoft Windows
2 When a virus is detected, an alert message is displayed in Microsoft Windows
computers. Refer to
if your Windows computer does not
display the alert messages.
3 Changes to the ZyWALL’s anti-virus settings affect new sessions (not the sessions that
already existed before you applied the changed settings).
4 The ZyWALL does not scan the following file/traffic types:
• Simultaneous downloads of a file using multiple connections. For example, when you
use FlashGet to download sections of a file simultaneously.
• Encrypted traffic. This could be password-protected files or VPN traffic where the
ZyWALL is not the endpoint (pass-through VPN traffic).
• Traffic through custom (non-standard) ports. The only exception is FTP traffic. The
ZyWALL scans whatever port number is specified for FTP in the ALG screen.
• ZIP file(s) within a ZIP file.
Finding Out More
• See
for related information on these screens.
• See
for anti-virus background information.
28.1.3 Before You Begin
• Before using anti-virus, see
for how to register for the anti-virus
service.
• You may need to customize the zones (in the Network > Zone) used for the anti-virus
scanning direction.
28.2 Anti-Virus Summary Screen
Click Anti-X > Anti-Virus to display the configuration screen as shown next.