RV082 - Dual WAN - Static IPs

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by raleighthings, Dec 2, 2006.

  1. raleighthings

    raleighthings LI Guru Member

    Can I even do what I want to do? I'm having trouble figuring this out.

    What I had was a single ADSL line with a block of 16 static IPs.
    Router was a Netopia R9100
    Router is handed when connected.
    ISP routes to this router
    All of internal network tied to 1 LAN port on the R9100
    Router does NAT so that internal 192.168.4.x all routes through

    Mail server and a few other machines are set a 1.2.6.x address such as and some also to a 192.168.4.x address on the same port.

    No VLANS

    The new setup we're moving to is to have both a T1 and the ADSL line. We have new block of static IPs on the T1. The ADSL is planned to become a single static IP with no other block of static IPs.

    I can't figure out how to get the static IPs to route to the LAN for addresses such as


  2. Toxic

    Toxic Administrator Staff Member

    could you possibly try one-to-one NAT feature?

    quote from RV042 one-to-one help.
  3. raleighthings

    raleighthings LI Guru Member

    Thanks for the reply.

    Yes, but I do want some of the machines to run the real external IPs. It makes some of the software issues on those machines easier. Much at times. There are some situations where the software needs to act as the external IP not a NAT'd one.

    Any other choices?
  4. raleighthings

    raleighthings LI Guru Member

    How about this. Will the 1 to 1 NAT allow me to set up something like:
    WAN maps to internal for 4 IPs?

    I don't want to try this from here as the router is 5 miles away and I really don't want to drive down there today if I FUBAR things. :)
  5. pablito

    pablito Network Guru Member

    I don't think you want to setup your extra IPs on internal machines and then expect to map them. The way to use the IPs directly is with the DMZ port (+switch) but you loose dual WAN ability.
    I think the 1-1 NAT will do what you want. Even though the servers are NAT'd you get to firewall them like it is an external IP. You don't have to setup forwarding, you setup allow and deny rules instead. It should work well.
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