Planet Networking & Communication CS-2001 User Manual page 538

14.1.1 Filtering Out the Virus Emails on Mail Server
Prerequisite Setup
Configure Port1 as LAN1 (192.168.1.1, NAT/ Transparent Routing mode) and
connect it to the LAN which is using 192.168.1.x/24.
Configure Port2 as WAN1(61.11.11.11) and connect it to the ADSL Termination Unit
Remote to access the Internet. IP range: 61.11.11.10 to 61.11.11.14.
Configure Port3 as WAN2 (211.22.22.22) and connect it to the ADSL Termination
Unit Remote to access the Internet. IP range: 211.22.22.18 to 211.22.22.30.
Configure Port4 as DMZ1(Transparent Routing mode) and connect it to the mail
server. IP address:61.11.11.12.
Step 1. To enable internal users to receive emails from external mail server, use an
external DNS server to resolve domain names. (Please decide which
external DNS server to use on your own.)
Step 2. To enable external users to receive emails from internal mail server,
configure as below:
1. Deploy the mail server in DMZ.
2. Type "61.11.11.12" in the IP Address field of Internet Protocol
(TCP/IP) Properties.
3. Configure the Preferred DNS Server field in Internet Protocol
(TCP/IP) Properties. (Use an external DNS server to resolve domain
names)
4. Name the server as "supportplanet.com.tw".
Step 3. Go to Policy Object > Address > DMZ, set as below:
Figure 14-2 Creating an Address Setting Corresponding to the Mail Server
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(Figure 14-2)