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Multiple wan subnet with multiple transparent range

Can we have multiple subnet on wan interface and with this multiple subnet range transparent mode configuration.
Category: Mid Range Firewalls
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  • SaravananSaravanan Moderator
    edited February 16

    Hi @EHSAN,

    Thank you for visiting SonicWall Community.

    Yes, we can have multiple subnets on the WAN interface. Transparent mode is supported only on the subnet that is configured on the WAN interface. Please refer below KB article and it can give you clear cut info.

    Hope this helps.

    Regards

    Saravanan V

    Technical Support Advisor - Premier Services

    Professional Services

  • EhsanEhsan Newbie ✭

    Dear Sir,

    After creating two subnet say 1.1.1.1 and 2.2.2.1 for wan (x2).

    can we create range of 1.1.1.2 to 1.1.1.3 in transparent mode for x3. and range of 2.2.2.2 to 2.2.2.3 in transparent mode for x4.


    Thanks and regards,

  • Hi @EHSAN,

    Only one Transparent mode will be possible based on the primary WAN interface. Lets say X1 as Primary WAN and X2 as Secondary WAN. We can have either X3 or X4 bridged to X1 WAN (Primary WAN) but cannot be bridged to X2 WAN (Secondary WAN). If attempted, you may get error.

    Hope this clarifies.

    Regards

    Saravanan V

    Technical Support Advisor - Premier Services

    Professional Services

  • EhsanEhsan Newbie ✭

    Dear Sir,


    Actually my question is if X! primary wan having two different network range of of IP say 192.168.1.1

    and 192.168.2.1, than can we do X3 and X4 transparent to X1. address object1 zone lan = 192.168.1.2 - 254 in interface X3.

    And address object2 zone lan= 192.168.2.2 - 254 in interface X4.

    Thanks and best regards.

  • prestonpreston Enthusiast ✭✭
    edited February 17

    Hi Ehsan , you probably want to try the routed mode on the other Interfaces to use with the additional subnet on the WAN,

    So you can have X1 for example with the primary Subnet configured and if you want use another Interface in Transparent (L3 Splice mode) to another Interface(s)

    For the second subnet you can set up another Interface as i.e. DMZ X4 then give it an IP in the secondary subnet and enable routing mode in the Advanced Tab ( turns NAT off ) and point it to X1 as the Outbound Interface (it will still need the same gateway as the X1 Interface,

    but this way everything behind this interface would not be using NAT, it's not as flexible as Transparent mode as it's the whole subnet (not just 1IP or a Range, but if you want to spread across Interfaces you may should be able to use PortShield or Native Bridge mode on those other Interfaces to X4


    in addition to @Saravanan's link there is another option in the Diag page to enable secondary Subnets for the WAN which negates the need for adding the ARPs etc.. but that is if you want to use the additional subnet for NAT.

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