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    Configuring the Mapping Between Private and Public IP Addresses for the NAT Service

    Your cCPE service provider must configure public IP address pools and the services interfaces on their router before you can perform this procedure. See the following topics for complete details:

    To configure the mapping between the public and private IP addresses used by the NAT service:

    Note: Port mapping entries can only be created after the basic NAT service has been instantiated.

    1. In the Selfcare Portal task pane, select Administration > Service Management.
    2. Select the NAT tab.

      The NAT page appears, an example of which is shown in Figure 1.

      Figure 1: Example-NAT Page

      Example-NAT Page

      The Site and Access Link fields are read-only. The combination of the site and access link identify the router where the NAT service was created by your cCPE service provider.

      The External Address field contains the range of public addresses that your service provider allocated for the NAT service. The format is x.x.x.x for a single address or x.x.x.x – y.y.y.y for multiple addresses.

      The fields in the Exposed Internal Servers group box contain the mappings defined for the basic NAT service. These fields enable you to map an internal resource (like a Web server or FTP server) to a public address and port. These fields are described in Table 1.

    3. (Optional) To configure the mapping, use the Add (+) and Delete (-) icons in the Exposed Internal Servers group box and specify the options described in Table 1.

      Table 1: Port Mapping Fields




      Specify a name for the mapping. For example, Web Server or FTP Server.

      External Address

      Specify one of the external public addresses allocated for the basic NAT service. If a single address is allocated, this column is not shown.

      External Port

      Specify the external port number that is mapped to the address specified in the External Address field. You can specify only a single port. Both TCP and UDP traffic are supported.

      The external port can be the same as the internal port, however if there are multiple internal services using the same port, the port numbers must be unique. For example, the customer runs a web server on address, then the internal address =, the port is 80 (HTTP) If the external port is also 80, then the web server is accessible as http://external-address, otherwise it is accessible as http://external-address:external-port. Be sure not to add spaces.

      Internal Address

      Specify the address of the internal resource that you want to expose and map to the public address. For example, the private address of a web or FTP server. a web server.

      Internal Port

      Specify the port on the internal resource specified in the Internal Address field. For example, web servers typically run on port 80 for HTTP, or 443 for HTTPS.

    4. (Optional) Add a new mapping:
      1. In the Exposed Internal Servers group box, select the Add (+) icon .

        A new row is added to the Exposed Internal Servers group box.

      2. Select the newly added row and specify the fields described in Table 1.
    5. (Optional) Modify an existing mapping:
      1. In the Exposed Internal Servers group box, select the mapping fields you want to modify .
      2. Specify your changes for each field you want modify. See Table 1 for a description of each field.
    6. (Optional) Delete a mapping:
      1. Select the mapping row from the Exposed Internal Servers group box.
      2. Select Delete.
    7. Select Update to save your changes.

    Modified: 2015-11-09