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Advanced
Firewall
URL Blocking
URL Blocking lets you block websites containing specific keywords from
being accessed through this gateway. Displayed below is the list of
blocking rules:
Filter Name:
Unique identifier for the content filtering rule.
Keywords:
The keywords that are used to filter websites accessed by
local network users. The content filtering rule is based on these
keywords.
Domains:
The internet domain on which content filtering rules is
applied.
Please follow the steps below to setup:
Step 1: Click Add to add a blocking rule. The image below uses
yahoo
to demonstrate: set
limit_yahoo
as the filter name and
yahoo
as the
keyword.
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Step 2: Go to
“Rules for schedule” page
Check the box to Enable
Parental Control
Click Apply to enable the configurations for
“List of
Parental Control Profiles”
.
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Step 3: Click Add to add profiles:
(1) Enter Profile Name.
(2) Select your Group membership (admin/guest).
(3) Check the box to Enable Content Filtering.
(4) Select a Filter Content.
(5) Click Apply.
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. The
webpage will ask you to login. Please login according to your Group
membership setting on step 2 (admin/guest).
again. Since
yahoo
is the keyword for blocked webpage therefore you will see the
denial message while accessing any content that include the keyword.
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Advanced
Firewall
DoS Attacks
A denial-of-service attack (DoS attack) is an attempt to make a device
resource unavailable to its intended users.
SYN Flood:
Enter the maximum number of SYN packets per second the
security appliance accepts before determining that a SYN Flood
Intrusion is occurring. This value can range between 1 and 10,000 SYN
packets per second. The default is 128 SYN packets per second.
Echo Storm:
The security tool monitors the number of pings per
second to determine when to declare an echo storm intrusion event.
Echo storm intrusion events are not blacklisted. This value can range
between 1 and 10,000 ping packets per second. The default is 15 ping
packets per second.
ICMP Flood:
The security tool monitors the number of ICMP packets
per second, not including ping packets, to determine when to declare
an ICMP flood intrusion event. ICMP flood events are not blacklisted.
This value can range between 1 and 10,000 ICMP packets per second.
The default is 100 ICMP packets per second.
Click Apply to apply the changes. Or click Reset to undo your
configurations.
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