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Web-based Configuration Guide

AR650, AR1600, and AR6100 V300R003

This document describes how to configure and maintain your routers using the web platform.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
External Network Access

External Network Access

Context

When enterprise users access the Internet using NAT, network address port translation (NAPT) can be configured to implement concurrent address translation. NAPT allows multiple internal addresses to be mapped to the same public address. It is also called many-to-one address translation or address multiplexing. NAPT translates the IP address and port number of a packet so that multiple private users can use the same public IP address to access the Internet.

Easy IP uses access control lists (ACLs) to control the private IP addresses that can be translated. Easy IP applies to the scenario where hosts on small-scale LANs access the Internet. Generally, small-scale LANs are deployed at small- and medium-sized cybercafes or small-sized offices where only a few internal hosts are used and the outbound interface obtains a temporary public IP address through dial-up. Internal hosts use the temporary public IP address to access the Internet.

Procedure

  • Creating an external network access configuration
    1. Log in to the web platform, and choose IP Service > NAT. The External Network Access tab page is displayed, as shown in Figure 13-5.

      Figure 13-5  External Network Access tab page

    2. Click Create, and set parameters in the Create External Network Access dialog box that is displayed. Table 13-6 describes the parameters.

      Table 13-6  External network access parameters

      Parameter

      Description

      Interface name

      Name of an interface where network access is to be enabled. Generally, Layer 3 interface is configured, except loopback and NULL interfaces.

      Translation mode

      IP address translation mode used by internal users to access external servers. Translation modes are as follows.
      • PAT (Port Address Translation): The IP address and port number in a data packet are translated at the same time.
      • Easy IP: The IP address of the selected interface is used as the translated public IP address.
      • NO-PAT: Only the IP address in a data packet is translated. The port number is not used.
      NOTE:
      If users access a network through dialup such as Point-to-Point Protocol over Ethernet (PPPoE), you can select Easy IP.

      Translated source

      Translated source address in PAT mode.
      • IP segment: Specifies an IP address segment of the translated source IP address (the network segment of the NAT address pool).
      • Specified interface: Specifies a specified interface IP address as the translated source IP address.

      Specified interface

      Specified interface IP address, which is used as the translated source IP address.

      Start IP address

      Start IP address of the NAT address pool.

      End IP address

      End IP address of the NAT address pool. The end IP address must be not smaller than the start IP address. A maximum of 255 IP addresses can be configured in the NAT address pool.

      ACL name

      ACL for internal users.

    3. Click OK.
  • Modifying an external network access configuration
    1. Log in to the web platform, and choose IP Service > NAT. The External Network Access tab page is displayed.
    2. In the External Network Access area, click corresponding to an external network access configuration.
    3. In the Modify External Network Access dialog box, modify parameters listed in Table 13-6 based on the site requirements. The Interface name parameter cannot be modified.
    4. Click OK to make the settings take effect.
  • Deleting an external network access configuration
    1. Log in to the web platform, and choose IP Service > NAT. The External Network Access tab page is displayed.
    2. In the External Network Access area, select the check box next to an external network access configuration, and click Delete.
    3. In the dialog box that is displayed, click OK.
  • Updating the external network access entry
    1. Log in to the web platform and choose IP Service > NAT > External Network Access to check the configured external network access entry.
    2. Click Refresh to update the external network access entry.
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Updated: 2019-04-12

Document ID: EDOC1100041803

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