![background image](http://html.mh-extra.com/html/d-link/cp310-dfl-security-appliance/cp310-dfl-security-appliance_user-manual_75067258.webp)
Using SmartDefense
In this field… Do this…
M
Si
attack, while an overly large value
might degrade performance and cause legitimate requests to be dropped.
inimal MTU
ze
Type the minimum value allowed for the MTU field in IP packets sent by a
client.
An overly small value will not prevent an
The default value is 300.
can to determine whether ports are open and
vulnerable to an attack. This is most commonly done by attempting to access a port
nse indicates whether or not the port is open.
pes of port scans:
•
Host Port Scan.
The attacker scans a specific host's ports to determine
hich of
open.
•
Sweep S
fic
port is o
Port Scan
An attacker can perform a port s
and waiting for a response. The respo
This category includes the following ty
w
the ports are
can.
The attacker scans various hosts to determine where a speci
pen.
You can configure how the NetDefend fire
detected.
wall should react when a port scan is
242
D-Link NetDefend firewall User Guide