ZyXEL Communications ZyWALL 10/10, User Manual

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ZyWALL 10/10 II/50 Internet Security Gateway
Example Firewall Rules 16-7
i. A mail server with an IP of 192.168.10.2.
ii. Two FTP servers. You want FTP server 1 (IP of 192.168.10.3) to be accessible from the Internet,
but FTP server 2 (192.168.10.4) may only be accessed by internal users, i.e., from the local network.
iii. HTTP proxy server at 192.168.10.5.
You want:
i. To send alerts when there is an attack.
ii. To only allow access to the Internet from the HTTP proxy server and your mail server.
iii. To only allow FTP server 1 to be accessible from the Internet.
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 16-6 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.
Click this box to send alerts when
there is an attack.