RV082 VPN setup problems

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by barneyrubble, Jun 28, 2007.

  1. barneyrubble

    barneyrubble LI Guru Member

    I hope you can help.

    I have been asked by a friend to set up a VPN for him. He has an RV082 and an RVL200, both connected to the Internet by ADSL modems (the linksys AM200).

    The problem appears to be that the AM200s are more like a router than a modem, as they have their own IP address, and handle the ISP authentication themselves. Is there any way to get the gateway to gateway authentication working in this configuration, or do we need "dumber" modems.

    Also, I can only remotely configure one of the AM200s, but port forwarding to the RVL200 behind it works fine.... Any ideas????

    Thanks in advance
  2. d__l

    d__l Network Guru Member

    I'm not familiar with the AM200, but most other modems that handle authentication and have an IP address will have a bridged mode which disables the authentication, any DHCP server the modem might have, and any other router functionality of the modem. Bridging essentially dumbs down the modem so that the router behind it would be required to handle the authentication and all traffic would be passed through it without change.
  3. eric_stewart

    eric_stewart Super Moderator Staff Member Member

    If one or the other devices were not behind a NAT router then you could do it since both Linksys's support NAT traversal (NAT-T) detection. As d___l said (and seeing as you can configure one of the AM200s remotely) why don't you put it in "bridge" mode so it becomes just a pass-through device and all the authentication of the DSL connection happens on the Linksys box.

    As long as one of your devices has a public address then they will successfully negotiate NAT-T on the tunnel.

    So yes....one of your modems needs to be "dumbed" down.

  4. barneyrubble

    barneyrubble LI Guru Member

    Thanks guys, I saw the Bridged option but wasn't sure if it would break anything.

    I will try this over the weekend and report back....:smile:
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