Assigning a whole subnet to a Sonicwall behind a Cisco router

Posted on 2007-10-03
Last Modified: 2010-04-17
Multiple IP's on a Sonicwall behind a Cisco Router.
Question by:mjeet
    LVL 16

    Expert Comment

    so your set up is internet-router-sonicwall?you can set up v lans on the sonicwall if thats what your after-is this a big network?

    Author Comment

    I am sorry I didn't put in the description:

    We have a /27 range (Usable IP's 97-126) with a subnet  in a colo. But the colo facility has installed a Cisco router at .97 IP. And i want to assign the rest of the IP's to the WAN port of the Sonicwall. Now can I assign the subnet range to the SonicWall WAN port? I guess not as the .97 IP will also get assigned to the SonicWall and it won't be able to reach the Cisco router. How would I go about assigning all the IP's to the sonicwall?

    Author Comment

    I got it.I thought all the public IP's had to linked to the WAN port of the sonicwall for it to NAT and passthrough but turns out you could just map the IP's using the one-to-one NAT and create a access rule and SonicWall accepts connections for that IP.

    LVL 6

    Accepted Solution

    You need to assign just one IP to the WAN interface and create address objects for the rest of the IP address

      Network > Address Objects

    and create for example

            Name          Address Detail          Type          Zone
          external IP 1       x.x.x.99/      Host       WAN

    you can use it later for any NAT rule

    note:(you do need to specify the custom subnet mask 224 on the address object )

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