General Firewall Screen; Figure 82 Using Ip Alias To Solve The Triangle Route Problem; Figure 83 Security > Firewall > General L; Table 56 Security > Firewall > General - ZyXEL Communications NBG-318S - V3.60 User Manual

1 A computer on the LAN initiates a connection by sending a SYN packet to a receiving
server on the WAN.
2 The NBG318S reroutes the packet to Gateway A, which is in Subnet 2.
3 The reply from the WAN goes to the NBG318S.
4 The NBG318S then sends it to the computer on the LAN in Subnet 1.

Figure 82 Using IP Alias to Solve the Triangle Route Problem

14.3 General Firewall Screen

Click Security > Firewall to open the General screen. Use this screen to enable or disable the
NBG318S's firewall, and set up firewall logs.
Figure 83 Security > Firewall > General l
The following table describes the labels in this screen.
Table 56 Security > Firewall > General
LABEL
Enable Firewall
Packet Direction
NBG318S User's Guide
DESCRIPTION
Select this check box to activate the firewall. The NBG318S performs access
control and protects against Denial of Service (DoS) attacks when the firewall is
activated.
This is the direction of travel of packets.
Firewall rules are grouped based on the direction of travel of packets to which they
apply.
Chapter 14 Firewall
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