Hypertec ISDN 10T Router manual IP Mask of Remote Ethernet, Local End IP Address of Isdn Line

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IP Mask of Remote Ethernet

The remote IP mask is used to describe the remote IP sub-netting. The IP mask is entered by clicking the IP address bit map. The number of bits assigned for the IP subnet is shown next to the IP address bit map as a decimal number, for your reference.

Local End IP Address of ISDN Line

This field specifies the local end of the IP address of an IP connection. This field is applicable to the “numbered interface” IP address setting.

Remote End IP Address of ISDN Line

This field specifies the remote end of the IP address of an IP connection. This field is applicable to the “numbered interface” IP address setting.

IP Mask of ISDN Line

This field specifies the IP mask of the ISDN line when the “numbered interface” IP address scheme is used. Both local end and remote end should use the same IP mask.

Internet NAT Sub-menu

The Internet NAT sub-menu (see fig 4.12) is used to configure the NAT feature. NAT is a feature designed for security protection and cost saving for Internet access. NAT hides internal IP addresses from the outside world therefore decreasing the possibility of hacker attack. NAT translates the internal IP addresses into a single IP address for Internet access. If the number of IP address assigned by the ISP is a factor for billing, NAT can save the monthly bill.

Figure 0-10, Internet NAT Window

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