User Guide Part 2

Chapter 15 Firewall
AMG1312-T Series User’s Guide
181
The following table describes the labels in this screen.
15.6 Firewall Technical Reference
This section provides some technical background information about the topics covered in this
chapter.
15.6.1 Firewall Rules Overview
Your customized rules take precedence and override the AMG1312-T Series’s default settings. The
AMG1312-T Series checks the source IP address, destination IP address and IP protocol type of
network traffic against the firewall rules (in the order you list them). When the traffic matches a
rule, the AMG1312-T Series takes the action specified in the rule.
Firewall rules are grouped based on the direction of travel of packets to which they apply:
Note: The LAN includes both the LAN port and the WLAN.
By default, the AMG1312-T Series’s stateful packet inspection allows packets traveling in the
following directions:
•LAN to Router
These rules specify which computers on the LAN can manage the AMG1312-T Series (remote
management).
Note: You can also configure the remote management settings to allow only a specific
computer to manage the AMG1312-T Series.
Table 71 Security > Firewall > DoS > Advanced
LABEL DESCRIPTION
TCP SYN-Request
Count
This is the rate of new TCP half-open sessions per second that causes the firewall to
start deleting half-open sessions. When the rate of new connection attempts rises
above this number, the AMG1312-T Series deletes half-open sessions as required to
accommodate new connection attempts.
UDP Packet Count This is the rate of new UDP half-open sessions per second that causes the firewall to
start deleting half-open sessions. When the rate of new connection attempts rises
above this number, the AMG1312-T Series deletes half-open sessions as required to
accommodate new connection attempts.
ICMP Echo-Request
Count
This is the rate of new ICMP Echo-Request half-open sessions per second that causes
the firewall to start deleting half-open sessions. When the rate of new connection
attempts rises above this number, the AMG1312-T Series deletes half-open sessions
as required to accommodate new connection attempts.
Back Click this button to return to the previous screen.
Apply Click this to save your changes.
Cancel Click this to restore your previously saved settings.
•LAN to Router •WAN to LAN
• LAN to WAN • WAN to Router