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Page 516 / 944 Scroll up to view Page 511 - 515
Chapter 31 ADP
ZyWALL USG 50 User’s Guide
516
31.3
The Profile Summary Screen
Use this screen to:
•
Create a new profile using an existing base profile
•
Edit an existing profile
•
Delete an existing profile
Status
The activate (light bulb) icon is lit when the entry is active and
dimmed when the entry is inactive.
From, To
This is the direction of travel of packets to which an anomaly profile
is bound. Traffic direction is defined by the zone the traffic is coming
from and the zone the traffic is going to.
Use the
From
field to specify the zone from which the traffic is
coming. Select
ZyWALL
to specify traffic coming from the ZyWALL
itself.
Use the
To
field to specify the zone to which the traffic is going.
Select
ZyWALL
to specify traffic destined for the ZyWALL itself.
From
LAN1 To LAN1
means packets traveling from a computer on
one LAN1 subnet to a computer on another LAN1 subnet via the
ZyWALL’s LAN1 zone interfaces. The ZyWALL does not check packets
traveling from a LAN1 computer to another LAN1 computer on the
same subnet.
From
WAN To WAN
means packets that come in from the WAN
zone and the ZyWALL routes back out through the WAN zone.
Note: Depending on your network topology and traffic load,
applying every packet direction to an anomaly profile may
affect the ZyWALL’s performance.
Anomaly Profile
An anomaly profile is a set of anomaly rules with configured
activation, log and action settings. This field shows which anomaly
profile is bound to which traffic direction. Select an ADP profile to
apply to the entry’s traffic direction. Configure the ADP profiles in the
ADP profile screens.
Apply
Click
Apply
to save your changes.
Reset
Click
Reset
to return the screen to its last-saved settings.
Table 153
Configuration > Anti-X > ADP > General
(continued)
LABEL
DESCRIPTION
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Chapter 31 ADP
ZyWALL USG 50 User’s Guide
517
31.3.1
Base Profiles
The ZyWALL comes with base profiles. You use base profiles to create new
profiles. In the
Configuration > Anti-X > ADP > Profile
screen, click
Add
to
display the following screen.
Figure 304
Base Profiles
These are the default base profiles at the time of writing.
31.3.2
Configuring The ADP Profile Summary Screen
Select
Configuration > Anti-X > ADP > Profile
.
Figure 305
Configuration > Anti-X > ADP > Profile
Table 154
Base Profiles
BASE
PROFILE
DESCRIPTION
none
All traffic anomaly and protocol anomaly rules are disabled. No logs are
generated nor actions are taken.
all
All traffic anomaly and protocol anomaly rules are enabled. Rules with a
high or severe severity level (greater than three) generate log alerts
and cause packets that trigger them to be dropped. Rules with a very
low, low or medium severity level (less than or equal to three) generate
logs (not log alerts) and no action is taken on packets that trigger them.
OK
Click
OK
to save your changes.
Cancel
Click
Cancel
to exit this screen without saving your changes.
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Chapter 31 ADP
ZyWALL USG 50 User’s Guide
518
The following table describes the fields in this screen.
31.3.3
Creating New ADP Profiles
You may want to create a new profile if not all rules in a base profile are applicable
to your network. In this case you should disable non-applicable rules so as to
improve ZyWALL ADP processing efficiency.
You may also find that certain rules are triggering too many false positives or false
negatives. A false positive is when valid traffic is flagged as an attack. A false
negative is when invalid traffic is wrongly allowed to pass through the ZyWALL. As
each network is different, false positives and false negatives are common on initial
ADP deployment.
You could create a new ‘monitor profile’ that creates logs but all actions are
disabled. Observe the logs over time and try to eliminate the causes of the false
alarms. When you’re satisfied that they have been reduced to an acceptable level,
you could then create an ‘inline profile’ whereby you configure appropriate actions
to be taken when a packet matches a rule.
ADP profiles consist of traffic anomaly profiles and protocol anomaly profiles. To
create a new profile, select a base profile (see
Table 154 on page 517
) and then
click
OK
to go to the profile details screen. Type a new profile name, enable or
disable individual rules and then edit the default log options and actions.
31.3.4
Traffic Anomaly Profiles
The traffic anomaly screen is the second screen in an ADP profile. Traffic anomaly
detection looks for abnormal behavior such as scan or flooding attempts. In the
Configuration > Anti-X > ADP > Profile
screen, click the
Edit
icon or click the
Add
icon and choose a base profile. If you made changes to other screens
Table 155
Anti-X > ADP > Profile
LABEL
DESCRIPTION
Add
Click this to create a new entry.
Edit
Select an entry and click this to be able to modify it.
Remove
Select an entry and click this to delete it.
#
This is the entry’s index number in the list.
Name
This is the name of the profile you created.
Base Profile
This is the base profile from which the profile was created.
Page 519 / 944
Chapter 31 ADP
ZyWALL USG 50 User’s Guide
519
belonging to this profile, make sure you have clicked
OK
or
Save
to save the
changes before selecting the
Traffic Anomaly
tab.
Figure 306
Profiles: Traffic Anomaly
Page 520 / 944
Chapter 31 ADP
ZyWALL USG 50 User’s Guide
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The following table describes the fields in this screen.
Table 156
Configuration > ADP > Profile > Traffic Anomaly
LABEL
DESCRIPTION
Name
This is the name of the ADP profile. You may use 1-31 alphanumeric
characters, underscores(
_
), or dashes (-), but the first character cannot
be a number. This value is case-sensitive. These are valid, unique profile
names:
MyProfile
mYProfile
Mymy12_3-4
These are invalid profile names:
1mYProfile
My Profile
MyProfile?
Whatalongprofilename123456789012
Scan/Flood
Detection
Sensitivity
(Scan detection only.) Select a sensitivity level so as to reduce false
positives in your network. If you choose low sensitivity, then scan
thresholds and sample times are set low, so you will have fewer logs and
false positives; however some traffic anomaly attacks may not be
detected.
If you choose high sensitivity, then scan thresholds and sample times are
set high, so most traffic anomaly attacks will be detected; however you
will have more logs and false positives.
Block
Period
Specify for how many seconds the ZyWALL blocks all packets from being
sent to the victim (destination) of a detected anomaly attack.
Activate
To turn on an entry, select it and click
Activate
.
Inactivate
To turn off an entry, select it and click
Inactivate
.
Log
To edit an item’s log option, select it and use the
Log
icon. Select
whether to have the ZyWALL generate a log (
log
), log and alert (
log
alert
) or neither (
no
) when traffic matches this anomaly rule. See
Chapter 46 on page 723
for more on logs.
Action
To edit what action the ZyWALL takes when a packet matches a rule,
select the signature and use the
Action
icon.
none
: The ZyWALL takes no action when a packet matches the
signature(s).
block
: The ZyWALL silently drops packets that matches the rule. Neither
sender nor receiver are notified.
#
This is the entry’s index number in the list.
Status
The activate (light bulb) icon is lit when the entry is active and dimmed
when the entry is inactive.

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