P312 Broadband Security Gateway

Type a name for this custom port and select TCP service.

Click Single and enter a port number of 110.

Click Apply when you’ve finished.

Figure 19-7 Configuring A POP Custom Port

Step 4. Now, we will create rules to block all outgoing traffic (from the local network to the Internet) except for traffic originating from the HTTP proxy server and our mail server. Click Internet to see the Rule Summary screen. Now click an available No. (rule number) radio button, then click Edit to bring up the next screen.

Step 5. Click SrcAdd under the Source Address box and enter the IP of the mail server (192.168.10.2) in the same fashion as what we did in Figure 19-4.

19-8

Examples Firewall Rules

Page 210
Image 210
ZyXEL Communications P-312 manual Configuring a POP Custom Port