43
Field
Description
configuration.
Mark DSCP
Attach the DSCP mark to the mapped packet.
Mark 802.1p Priority
Attach the 802.1p mark to the mapped packet.
Click
Apply
to save the settings.
3.3.7
Firewall Settings
A denial-of-service (DoS) attack is one of the most common network attacks and is characterized by an explicit
attempt by attackers to prevent legitimate users of a service from using that service. It usually leads to overload of
system server or core dump of the system.
Choose
Advanced
>
Firewall Settings
. The page as shown in the following figure appears:
Click
Apply
to save the settings.
3.3.8
DNS
Domain name system (DNS) is an Internet service that translates domain names into IP addresses. Because domain
names are alphabetic, they are easier to remember. The Internet, however, is actually based on IP addresses. Each
time you use a domain name, a DNS service must translate the name into the corresponding IP address. For
example, the domain name www.example.com might be translated to 198.105.232.4.
The DNS system is, in fact, its own network. If one DNS server does not know how to translate a particular domain
name, it asks another one, and so on, until the correct IP address is returned.
Choose
Advanced
>
DNS
. The page as shown in the following figure appears:
