[rbak-nsp] Some cleverness needed

[Blake Willis]

On Dec 5, 2009, at 6:00 PM, redback-nsp-request at puck.nether.net wrote:

> I've a context acting as LAC for a customer and I would like to  
> "walled
> garden" (http redirect) their end-users when the customer's network  
> fails.
>
> Since the context only contains routes for their LNS endpoints, I will
> be terminating the users locally (through aaa authentication radius,
> none) and using HTTP redirect.
>
> The problem arises when the end-user's browser initiates a DNS  
> request,
> if the customer's network is completely offline, I'll need to handle
> this as well.


Hi Dave,

	Hope all's well.  If some of your DNS servers don't need to reach the  
customer's DNS servers, you could set up an easy bit of hackery by  
configuring the customer's DNS IPs as secondary loopbacks on your own  
DNS servers and injecting the routes for them into your "dead-customer- 
lns" context (and making sure your DNS servers have a route back to  
the subscribers of course)...  Not the cleanest solution in the world,  
but a solution...

	AFAIK there's still no per-subs NAT, but I haven't seen the release  
notes for 6.2 yet.

---
  Blake Willis
  Network Architect
  iBrowse
  blake at ibrowse dot com