ZyXEL Communications Broadband Security Gateway P-312 User Manual
Page 209
P312 Broadband Security Gateway
Example Firewall Rules
19-7
Step 1.
First we want to send alerts when there is an attack. Go to the Attack Alert screen (click
Configuration, then the Attack Alert tab) shown next.
Figure 19-6
Send Alerts When Attacked
Step 2.
Configure the E-Mail screen as shown in example 1 – our mail server’s IP is 192.168.10.2.
Step 3.
Now we want to restrict access to the Internet except for the HTTP proxy server and our mail
server. First we need to create a custom port for POP3. POP (Post Office Protocol) is an Internet
mail server protocol that provides an incoming message storage system. It works in conjunction
with the SMTP (Simple Mail Transfer Protocol), which provides the message transport services
required to move mail from one system to another. The current version is called POP3. Click
Custom Ports and configure the screen as follows.
Check this box to send alerts
when there is an attack.