Intrusion Detection / Prevention
The DFL-200 Intrusion Detection/Prevention System (IDS/IDP) is a real-time intrusion
detection and prevention sensor that identifies and takes action against a wide variety of
suspicious network activity. The IDS uses intrusion s ignatures, stored in the attack database,
to identify the most common attacks. In response to an attack, the IDS protect the networks
behind the DFL-200 by dropping the traffic. To notify of the attack the IDS sends an email to
the system administrators if email alerting is converted. There are two modes that can be
configured, either Inspection Only or Prevention. Inspection Only will only inspect the traffic
and if the DFL-200 sees anything it will log, email an alert (if configur ed) and pass on the
traffic, if Prevention is used the traffic will be dropped and logged and if configured a email
alert will be sent.
D-Link updates the attack database periodically. Since firmware v ersion 1.30.00 automatic
updates are possible. If IDS or IDP is enabled for at least one of the policies or port mappings,
auto updating of the IDS database will be enabled. The firewall will then automatically
download the latest database from the D-Link website.
Add a new policy Follow these steps to add a new outgoing policy.
Step 1. Choose the LAN->WAN policy list from the available policy lists.
Step 2. Click on the Add new link.
Step 3. Fill in the following values:
Name: Specifies a symbolic name for the rule. This name is used mainly as a rule
reference in log data and for easy reference in the policy list.
Action: Select Allow to allow this type of traffic.
Source Nets: – Specifies the sender span of IP addresses to be compared to the
received packet. Leave this blank to match everything.
Source Users/Groups: Specifies if an authenticated username is needed for this policy to
match. Either make a list of usernames, separated by , or write Any for any authenticated
user. If it’s left blank there is no need for authentication for the policy.
Destination Nets: Specifies the span of IP addresses to be compared to the destination
IP of the received packet. Leave this blank to match everything.
Destination Users/Groups: Specifies if an authenticated username is needed for this
policy to match. Either make a list of usernames, separated by , or write Any for any
authenticated user. If it’s left blank there is no need for authentication for the policy.
Service: Either choose a predefined service from the dropdown menu or make a custom.
Schedule: Choose what schedule should be used for this polic y to match, choose Always
for no scheduling.
Click the Apply button below to apply the change or click Cancel to discard changes