[ILUG] Netopia 2247-02 (fware 7.7.0r6) and IP passthrough

[Robert Sweetnam]

Maciej Bliziński wrote:
> I'm playing with a new home network setup. In asciiart, it looks like this:
>
> Internet
>  |
> DSL line
>  |
> Netopia 2247-02 with IP Passthrough option
>  |
> OpenWRT Kamikaze 7.09 powered router, with public IP,
>  |
> home LAN
>
> OpenWRT router obtains public IP address from Netopia and does
> NATting. All fine, except... all TCP connections are being dropped
> every 2 or 3 minutes. This means shutting down all ssh sessions, web
> page loading 'gets stuck'. There also are brief losses of sound when
> talking over VoIP.
>
> TCP connections need to be dropped when the WAN IP is being changed.
> My public IP address indeed changes from time to time, but I also
> observe connections dropped without IP address change. If I'm not
> mistaken, dhcp renewals shouldn't affect existing TCP connections.
>
> For the time being, I've switched to static NAT, it seems to be
> better. But I'd like to avoid having a private address bound to
> OpenWRT.
>
> Does anyone here use Netopia 4407-02 IP passthrough function? Is it
> broken, or is it fine?
>
> Maciej
>   
Hi,

I have a 3347NWG which I have configured to pass its IP address to a 
smoothwall machine, this is almost identical to your diagram. It works 
fine for me although I do have a static IP address.

Regards
Robert