HP VPN Firewall Appliances NAT and ALG Configuration Guide

17
Item Descri
p
tion
Internal IP Enter the IP addresses of the internal server.
Internal Port
Enter the port number of the internal server.
This option is available when 6(TCP) or 17(UDP) is selected for the protocol type. If you
enter 0 in the field, all types of services are provided. Value 0 indicates a static
connection exists between the internal address and external address.
Configuring DNS mapping
1. From the navigation tree, select Firewall > NAT Policy > Internal Server.
2. In the DNS-MAP area, click Add.
The page for adding DNS-MAP appears.
Figure 15 Adding DNS-MAP page
3. Configure DNS mapping as shown in Table 7.
4. Click Apply.
Table 7 Configuration items
Item Descri
p
tion
Protocol Select the protocol supported by an internal server.
Global IP Specify the external IP address of the internal server.
Global Port Specify the port number of the internal server.
Domain Specify the domain name of the internal server.
NAT configuration example
Network requirements
As shown in Figure 16, a company has three public IP addresses in the range of 202.38.1.1/24 to
202.38.1.3/24, and a private network segment of 10.110.0.0/16. Specifically, the company requires
that the internal users in subnet 10.110.10.0/24 can access the Internet through NAT.