ZyXEL Communications ZYWALL10 - Manual (Page 218)

ZyWALL 10 Internet Security Gateway
Example Firewall Rules 19-7
Step 1. First you 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: your mail server’s IP is 192.168.10.2.
Step 3. Now you want to restrict access to the Internet except for the HTTP proxy server and your mail
server. First you 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.