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RV016 Multiple IP on one WAN port

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by smy1220, Jul 16, 2008.

  1. smy1220

    smy1220 Addicted to LI Member

    Ok so here is the deal.I want to put 3 web servers behind my RV016 on 3 of my 13 static IP addresses.

    On the RV016 i have 3 Wan ports turned on and in use.

    2 DSL lines on Wan 1 & 2 my T1 is on WAN 3. I want to NAT multiple IP's to different Servers on the SAME PORT 80.

    I could not find a way to do it so i though i would assign WAN4 to the next IP in my usables. This causes the router to tell me there is a conflict on WAN4. So my idea of using WAN 4-7 all plugged into my T1 I get conflicts.

    So if I assign

    WAN 3

    IP - xxx.15.27.2
    Subnet -
    Gateway xxx.15.27.1

    and WAN 4

    IP - xxx.15.27.3
    Subnet -
    Gateway xxx.15.27.1

    I get the conflict

    My other idea of just plugging in the one of the T1 ports to the WAN side and assigning publics to the servers causes the Router to need a reboot about every 10 Min to keep using the internet for some reason. It seems to also cause havoc with my internal DNS server and not being able to use named UNC's like \\media only can use \\ i am at a loss on what to do here. any suggestions would be greatly helpful.
  2. ifican

    ifican Network Guru Member

    I dont have any experience with the RV016 but the documentation i can find says 2 wan ports. At this point i am trying to make sense out of what exactly you are trying to do..........
  3. smy1220

    smy1220 Addicted to LI Member

    The RV016 has 2 Dedicated WAN ports and 5 ports that can be WAN or LAN for a possible grand total of 7 WAN's. I want to have 3 web servers behind the router and do NAT for 3 web servers on 3 seperate public ip's.
  4. ifican

    ifican Network Guru Member

    Sounds completely doable, as long as each nat is taking place on a different external subnet. My only concern is how the router keeps track of the internal subnet differences, not sure that is possible as it is not even easy to do on enterprise class routers. Let me do a little reading and see what i can dig up.
  5. sterner

    sterner LI Guru Member

    What about One-to-One NAT?
  6. ifican

    ifican Network Guru Member

    I have been busy all morning so i havent had time to look, one-to-one nat would work if you had 1 isp and were nating several ip's in the same range to internal ones. It definetely can be done but not sure with this device. will see what i can find.
  7. ifican

    ifican Network Guru Member

    Ok here is my concern and this is straight from the user guide:

    For example, you have a Local Area Network (LAN) for which
    the ISP has assigned the IP address range of
    to, with used as the Wide Area
    Network (WAN) or NAT public IP address of the Router.
    The address range of to is
    used for the devices on the LAN. With One-to-One NAT,
    the devices with the internal IP addresses of
    to may be accessed at the corresponding
    external IP addresses.

    I have not gone over the guide as well as i would like but from what i can find on the surface it does not appear to beable to do 1 to 1 across ip ranges. Though it feels like it should as i did discover you can run multiple subnets on the inside. Without beable to see one first hand its hard to tell but ill see if i can find anymore.
  8. sterner

    sterner LI Guru Member

    I think this is how smy1220 would need to setup One-to-One NAT:

    Assuming xxx.15.27.2 is the first IP in the WAN range, you will need to enter the next in line (xxx.15.27.3) for the Public Range Begin.

    You may need to re-assign static IP's for your servers because they need to be in range order. Assuming your first server is, and you have 10 servers, will be entered into Private Range Begin and the Range Length will be 10.

    You should still be able to use WANs 1 & 2 for DSL, and setup WAN 3 with xxx.15.27.2

    Make sense?
  9. ifican

    ifican Network Guru Member

    I got the impression that he wants to create nat for a web server from each of the wan connections: i.e. 1 from each DSL provider and 1 from the T-1 provider.
  10. sterner

    sterner LI Guru Member

    If he uses the DSL lines for web servers, he'll need to forward port 80 of course, but you can only do it once and it affects all WAN ports, so you would only get one web server. I don't know how it would affect One-to-One NAT though...
    Depending on his usage/scenario, he could use the DSL lines for internal web access, and leave the T1 for public access to the servers.

    Oh, and he has 13 static addresses on the T1 and only going to use 3 of them (actually 4, the first for the WAN port), it wouldn't make sense to me to use the DSL lines for the servers.

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