Firewall Technical Reference; Firewall Rules Overview - ZyXEL Communications AMG1302-T series User Manual

Chapter 15 Firewall
The following table describes the labels in this screen.
Table 67 Security > Firewall > DoS > Advanced
LABEL
TCP SYN-Request
Count
UDP Packet Count
ICMP Echo-Request
Count
Back
Apply
Cancel

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 AMG1302/AMG1202-TSeries's default
settings. The AMG1302/AMG1202-TSeries 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 AMG1302/AMG1202-TSeries takes the action specified in the rule.
Firewall rules are grouped based on the direction of travel of packets to which they apply:
• LAN to Router
• LAN to WAN
Note: The LAN includes both the LAN port and the WLAN.
By default, the AMG1302/AMG1202-TSeries'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 AMG1302/AMG1202-TSeries
(remote management).
Note: You can also configure the remote management settings to allow only a specific
computer to manage the AMG1302/AMG1202-TSeries.
186
DESCRIPTION
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 AMG1302/AMG1202-TSeries deletes half-open sessions as
required to accommodate new connection attempts.
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 AMG1302/AMG1202-TSeries deletes half-open sessions as
required to accommodate new connection attempts.
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 AMG1302/AMG1202-TSeries deletes half-open
sessions as required to accommodate new connection attempts.
Click this button to return to the previous screen.
Click this to save your changes.
Click this to restore your previously saved settings.
• WAN to LAN
• WAN to Router
AMG1302/AMG1202-TSeries User's Guide