Draytek VIGOR2820 series, User Manual, Page: 95 / 269

Vigor2820 Series User’s Guide 87
indicate the protocol type running over the upper layer. However,
the protocol types greater than 100 are reserved and undefined at
this time. Therefore, the router should have ability to detect and
reject this kind of packets.
Warning Messages We provide Syslog function for user to retrieve message from Vigor
router. The user, as a Syslog Server, shall receive the report sending
from Vigor router which is a Syslog Client.
All the warning messages related to DoS Defense will be sent to
user and user can review it through Syslog daemon. Look for the
keyword
DoS in the message, followed by a name to indicate what
kind of attacks is detected.
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For IPs in a range and service ports in a limited range usually will be applied in configuring
router’s settings, therefore we can define them with
objects and bind them with groups for
using conveniently. Later, we can select that object/group that can apply it. For example, all
the IPs in the same department can be defined with an IP object (a range of IP address).