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Page 466 / 944 Scroll up to view Page 461 - 465
Chapter 29 Anti-Virus
ZyWALL USG 50 User’s Guide
466
29.2
Anti-Virus Summary Screen
Click
Configuration > Anti-X
>
Anti-Virus
to display the configuration screen
as shown next.
Figure 282
Configuration > Anti-X > Anti-Virus > General
The following table describes the labels in this screen.
Table 135
Configuration > Anti-X > Anti-Virus > General
LABEL
DESCRIPTION
Show Advance
Settings / Hide
Advance
Settings
Click this button to display a greater or lesser number of configuration
fields.
Enable Anti-
Virus and Anti-
Spyware
Select this check box to check traffic for viruses and spyware. The
following table lists policies that define which traffic the ZyWALL scans
and the action it takes upon finding a virus.
Page 467 / 944
Chapter 29 Anti-Virus
ZyWALL USG 50 User’s Guide
467
Scan EICAR
Select this option to have the ZyWALL check for the EICAR test file and
treat it in the same way as a real virus file. The EICAR test file is a
standardized test file for signature based anti-virus scanners. When the
virus scanner detects the EICAR file, it responds in the same way as if it
found a real virus. Besides straightforward detection, the EICAR file can
also be compressed to test whether the anti-virus software can detect it
in a compressed file. The test string consists of the following human-
readable ASCII characters.
X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-
TEST-FILE!$H+H*
Policies
Add
Click this to create a new entry. Select an entry and click
Add
to create
a new entry after the selected entry.
Edit
Select an entry and click this to be able to modify it.
Remove
Select an entry and click this to delete it.
Activate
To turn on an entry, select it and click
Activate
.
Inactivate
To turn off an entry, select it and click
Inactivate
.
Move
To change an entry’s position in the numbered list, select it and click
Move
to display a field to type a number for where you want to put that
entry and press [ENTER] to move the entry to the number that you
typed.
Status
The activate (light bulb) icon is lit when the entry is active and dimmed
when the entry is inactive.
Priority
This is the position of an anti-virus policy in the list. The ordering of
your anti-virus policies is important as the ZyWALL applies them in
sequence. Once traffic matches an anti-virus policy, the ZyWALL applies
that policy and does not check the traffic against any more policies.
From
The anti-virus policy has the ZyWALL scan traffic coming from this zone
and going to the
To
zone.
To
The anti-virus policy has the ZyWALL scan traffic going to this zone from
the
From
zone.
Protocol
These are the protocols of traffic to scan for viruses.
FTP
applies to traffic using the TCP port number specified for FTP in the
ALG screen.
HTTP
applies to traffic using TCP ports 80, 8080 and 3128.
SMTP
applies to traffic using TCP port 25.
POP3
applies to traffic using TCP port 110.
IMAP4
applies to traffic using TCP port 143.
License
The following fields display information about the current state of your
subscription for virus signatures.
License
Status
This field displays whether a service is activated (
Licensed
) or not (
Not
Licensed
)
or expired (
Expired
).
Table 135
Configuration > Anti-X > Anti-Virus > General (continued)
LABEL
DESCRIPTION
Page 468 / 944
Chapter 29 Anti-Virus
ZyWALL USG 50 User’s Guide
468
License Type
This field displays whether you applied for a trial application (
Trial
) or
registered a service with your iCard’s PIN number (
Standard
).
None
displays when the service is not activated.
Apply new
Registration
This link appears if you have not registered for the service or only have
the trial registration. Click this link to go to the screen where you can
register for the service.
Signature
Information
The following fields display information on the current signature set that
the ZyWALL is using.
Anti-Virus
Engine Type
This field displays Kaspersky’s anti-virus engine .
Current
Version
This field displays the anti-virus signature set version number. This
number gets larger as the set is enhanced.
Signature
Number
This field displays the number of anti-virus signatures in this set.
Released
Date
This field displays the date and time the set was released.
Update
Signatures
Click this link to go to the screen you can use to download signatures
from the update server.
Apply
Click
Apply
to save your changes.
Reset
Click
Reset
to return the screen to its last-saved settings.
Table 135
Configuration > Anti-X > Anti-Virus > General (continued)
LABEL
DESCRIPTION
Page 469 / 944
Chapter 29 Anti-Virus
ZyWALL USG 50 User’s Guide
469
29.2.1
Anti-Virus Policy Add or Edit Screen
Click the
Add
or
Edit
icon in the
Configuration > Anti-X
>
Anti-Virus >
General
screen to display the configuration screen as shown next.
Figure 283
Configuration > Anti-X > Anti-Virus > General > Add
The following table describes the labels in this screen.
Table 136
Configuration > Anti-X > Anti-Virus > General > Add
LABEL
DESCRIPTION
Enable
Select this check box to have the ZyWALL apply this anti-virus policy
to check traffic for viruses.
From
To
Select source and destination zones for traffic to scan for viruses. The
anti-virus policy has the ZyWALL scan traffic coming from the
From
zone and going to the
To
zone.
Protocols to Scan
Select which protocols of traffic to scan for viruses.
HTTP
applies to traffic using TCP ports 80, 8080 and 3128.
FTP
applies to traffic using the TCP port number specified for FTP in
the ALG screen.
SMTP
applies to traffic using TCP port 25.
POP3
applies to traffic using TCP port 110.
IMAP4
applies to traffic using TCP port 143.
Page 470 / 944
Chapter 29 Anti-Virus
ZyWALL USG 50 User’s Guide
470
Actions When
Matched
Destroy infected
file
When you select this check box, if a virus pattern is matched, the
ZyWALL overwrites the infected portion of the file (and the rest of the
file) with zeros. The un-infected portion of the file before a virus
pattern was matched goes through unmodified.
Send Windows
Message
Select this check box to set the ZyWALL to send a message alert to
files’ intended user(s) using Microsoft Windows computers connected
to the to interface.
Refer to
Appendix C on page 851
if your Windows computer does not
display the alert messages.
Log
These are the log options:
no
: Do not create a log when a packet matches a signature(s).
log
: Create a log on the ZyWALL when a packet matches a
signature(s).
log alert
: An alert is an e-mailed log for more serious events that
may need more immediate attention. Select this option to have the
ZyWALL send an alert when a packet matches a signature(s).
White List / Black
List Checking
Check White List
Select this check box to check files against the white list.
Check Black List
Select this check box to check files against the black list.
File
decompression
Enable file
decompression
(ZIP and RAR)
Select this check box to have the ZyWALL scan a ZIP file (the file does
not have to have a “zip” or “rar” file extension). The ZyWALL first
decompresses the ZIP file and then scans the contents for viruses.
Note: The ZyWALL decompresses a ZIP file once. The ZyWALL
does NOT decompress any ZIP file(s) within a ZIP file.
Table 136
Configuration > Anti-X > Anti-Virus > General > Add (continued)
LABEL
DESCRIPTION

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