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Configuring access to server behind a SonicWall from WLAN zone to LAN using public IP address

08/17/2021 174 People found this article helpful 106,555 Views

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    Description

    This document describes how a host on a SonicWall WLAN can access a server on the LAN using the server's public IP address (typically provided by DNS).

    EXAMPLE: 

    NSA 4500 network in which the Primary LAN Subnet is 192.168.10.0 /24 and the Primary WAN IP is 1.1.1.1. Let's say you have a web site for your customers. You have already written the policies and rules needed so that outsiders can get to the web site, but it's really running on a private side server 192.168.10.20.

    Now imagine that you are a person using a laptop on the private side of WLAN. You want to reach the server using its public name or public IP, because you do the same thing when your laptop is with you on the road.

    If you sit on the private side and request http://www.domain.com, loopback is what makes it possible for that to work, even though the server is actually right next to you on a local IP address.

    Resolution

    �


    Resolution for SonicOS 6.5

    This release includes significant user interface changes and many new features that are different from the SonicOS 6.2 and earlier firmware. The below resolution is for customers using SonicOS 6.5 firmware.


    Creating Address Objects

    1. Click Manage Tab.
    2. Click Objects | Address Objects.
    3. Click Add under Address Objects and create the address object for server on LAN.
    • Address Object for server IP

      NameMy Server Private
      Zone LAN
      TypeHost
      IP address192.162.10.20
      Image
    • Address Object for WAN(Public) IP

      NameMy Server Public
      Zone WAN
      TypeHost
      IP address1.1.1.1

      Image

    Creating Loopback Policy.

    1. Click Manage tab.
    2. Click Rules | NAT Policies.
    3. Click Add button and choose following settings.
      Original Source:Firewalled Subnets
      Translated Source:My Server Public
      Original Destination:Myserver Public
      Translated Destination:Myserver Private
      Original service:Any
      Translated Service:Original
      Inbound Interface:Any
      Outbound Interface:Any
      Comment:Loopback Policy
      Enable NAT Policy:Checked
      Create Reflexive Policy:Unchecked


      Image

    Creating Firewall Access Rule.

    1. Click Manage tab 
    2. Click Rules | Access Rule.
    3. Select view type from View Style and go to WLAN to LAN.
    4. Click Add and choose the following settings.
    Action:Allow
    From Zone:WLAN
    To Zone:LAN
    Source port:Any
    Service: Any
    Source: Any
    Destination: My Server Public
    Users Allowed:All
    Schedule:Always on
    Enable Logging:Checked
    Allow Fragmented Packets:Checked
    Image


    Resolution for SonicOS 6.2 and Below

    The below resolution is for customers using SonicOS 6.2 and earlier firmware. For firewalls that are generation 6 and newer we suggest to upgrade to the latest general release of SonicOS 6.5 firmware.



    Creating Address Objects

    1. Navigate to Network | Address Objects.
    2. Click Add under address objects and create address object for server on LAN.

    • Address Object for server IP
      NameMy Server Private
      Zone LAN
      TypeHost
      IP address192.162.10.20


      Image


    • Address Object for WAN(Public) IP

      NameMy Server Public
      Zone WAN
      TypeHost
      IP address1.1.1.1

      Image

     Creating Loopback Policy.

    1. Navigate to Network | NAT Policies.
    2. Click Add button and choose following settings.

      Original Source:Firewalled Subnets
      Translated Source:My Server Public
      Original Destination:Myserver Public
      Translated Destination:Myserver Private
      Original service:Any
      Translated Service:Original
      Inbound Interface:Any
      Outbound Interface:Any
      Comment:Loopback Policy
      Enable NAT Policy:Checked
      Create Reflexive Policy:Unchecked


      Image

    Creating Firewall Access Rule.

    1. Navigate to Firewall | Access Rule.
    2. Select view type from View Style and go to WLAN to LAN.
    3. Click Add and choose the following settings.
    Action:Allow
    From Zone:WLAN
    To Zone:LAN
    Source port:Any
    Service: Any
    Source: Any
    Destination: My Server Public
    Users Allowed:All
    Schedule:Always on
    Enable Logging:Checked
    Allow Fragmented Packets:Checked
    Image

    Related Articles

    • Parserror on Event logs.
    • Switch from the Policy mode to classic mode on Gen 7 appliances
    • Analyzing TCP reset(RST)packets

    Categories

    • Firewalls > TZ Series > Networking
    • Firewalls > SonicWall SuperMassive 9000 Series > Networking
    • Firewalls > NSa Series > Networking
    • Firewalls > NSv Series > Networking

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