I don't know if that wil work or not?  I can't think of any reason why it wouldn't.  RFC 1918 addresses (192.168.0.0/16, 172.16.0.0/12, 10.0.0.0/8) are routable, they are just not supposed to be routed across the internet.  If the cloud wants to send something to your 190.191.192.0/24 network it will know to route to 23.24.25.26/32.  As long as 23.24.25.26/32 knows to route all 190.191.192.0/24 traffic to 192.168.0.1/32 and so forth, then it should work. The Internet only knows about your external legal address 23.24.25.26/32 and you are not trying to route RFC 1918 addresses across the Internet.

I recently read an article in Deamon News about using OpenBSD and IPF to create an IPless bridge to set up a packet filter without an IP, and it looks very similar to this.  I don't know much about bridging, but you might be able to do this with Linux too.  Check out the article http://www.daemonnews.org/200103/ipf_bridge.html.  


Dusty


> 
> anyone know if this works:
> 
> --------        ----------------------------          ---------------
> The    |        | Cisco 25xx               |          | Linux Router|
> Colud  |--------|23.24.25.26    192.168.0.1|----------|192.168.0.2  |
>        |        |                          |          |             |  
> --------        ----------------------------          |             |
>                                                   |190.191.192.1|
>                                                       ---------------
>                                                              |
>                                                              |
>                                                        --------------
>                                                        |    LAN     |
> 
> 
> Config:
> 1) cisco with static route 190.191.192.0/24 gw to 192.168.0.2
>    0.0.0.0 gw to the other end of the colud
> 
> 2) Linux 0.0.0.0(default route) to 192.168.0.1
> 
> 3) LAN host's default route to 190.191.192.1
> 
> will I encounter any problems by joining 2 routable networks with a non-routable(private ip) network ? have anyone tried this to save ip before? how does traceroute looks from outside to the 190.191.192.0 network ?  Will I cause any problem to the internet when I am doing this?  The reason for this is to use Linux's Class Based Queueing for bandwidth management. 
> 
> Thanks for your help
> 
> 
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