From: haettstegern@hoster.invalid   
      
   Fred Marshall wrote:   
   >>> Lacking that type of implementation, how do the packets destined for the   
   >>> VPN know where the VPN is?  Is there some kind of broadcast or what?  I   
   >>> can't imagine that all packets destined for the VPN are broadcast .... ?   
   >> What do you mean?   
   >   
   > To your last question: it appears it doesn't apply because of the first part   
   > of your answer.   
   >   
   > I suppose that some folks use a gateway router to also implement their VPNs.   
   > Then the next hop targetting would be dealt with almost by default.   
      
   If you mean that the machine/box/whatever that all clients in the   
   network use as their default router is the one that establishes the VPN,   
   then yes, because the router then knows everything it needs.   
      
   > However, if the VPN device is separate (in parallel with the internet   
   > router) then it appears it needs to be explicitly targetted with routes as   
   > you've suggested.   
      
   In that case, either each client in the network needs to know that   
   route, or their default router. Otherwise, these clients' packages would   
   be sent into the internet instead of the VPN because no-one would talk   
   to the correct router :)   
      
   Regards,   
   Michael   
      
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