RV042 and port forwarding

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by othoumin, Apr 24, 2008.

  1. othoumin

    othoumin Addicted to LI Member


    I just can't make port forwarding (which is quite a basic stuff) work on my RV042..
    I know, this is not new: http://www.linksysinfo.org/forums/showthread.php?t=53770, http://www.linksysinfo.org/forums/showthread.php?t=54656 etc..
    However, I did not find a solution to this very simple thing.

    I just need to make basic port forwarding (same port).
    I tried a lot of thing, port forwarding of course, firewall ACL, DMZ etc... But just can't make it work. I also tryed protocol binding in order to be sure that the answer is forwarded using the same wan as the input..
    The RV042 is the default gateway of the destination computer.
    In the log, the packet are accepted, but then nothing happens...

    Can someone help ? Please I start to become crazy..
  2. Toxic

    Toxic Administrator Staff Member

    do you assign IP to your PCs via Dynamic or Static DHCP?

    is your WAN and LAN in the same IP Subnet? what are the IP scopes on the WAN and LAN?
  3. othoumin

    othoumin Addicted to LI Member

    Port forwarding

    I'm using DHCP with ip reservation on mac address (so static DHCP I think).
    the destination IP is correct.

    Yes both LAN and WAN are in the same subnet (subnet masks
    IP address are different on WAN an LAN. however it would be possible to have duplicates.

    Another point. I'm using the RV042 as a gateway (not as router). I don't know if that has any impact.

    Internet access works well.

    Thanks for the answer.
  4. othoumin

    othoumin Addicted to LI Member

    Remote management

    Another point. Althought I've set it up, remote management does not work.
    I don't know if it is due to the fact that the port 80 is forwarded.
  5. Toxic

    Toxic Administrator Staff Member

    You should put Remote management on a different port other than port 80 tbh. you say the WAN and LAN have different IPs but are in the same subnet? Your WAN?LAN needs to be in a different Subnet.

    can you change your LAN to something totally different?



    do you have WAN LAN setup like so:

    LAN ???
  6. othoumin

    othoumin Addicted to LI Member

    Yes lan and wan have the same subnet mask.
    PCs / <=> RV042 /
    RV042 <=> WAN 1 (router/modem ADSL) /
    RV042 <=> WAN 2 (router/modem cable) /

    - I can't put the modems as bridges
    - I can't change the IP/subnet of WAN1 router
    - I've limited ability to change the IP/subnet of WAN2 routeur

    So, If I understand you well, I must change the RV042 to /
    and the PCs to 10.0.0.xx-yy /

    Am I correct?

    BTW, for the remote management, you said that I must use other port than 80. Why?

  7. othoumin

    othoumin Addicted to LI Member


    Hi again,

    Indeed changing the IPs on the LAN to 10.0.0.x make it worked!
    Thanks a LOT.
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