Multi-Domain Cookie Issue

Here's my situation...

 

 

I have a site, www.sample.com - configured with Akamai. The "origin" points to a VS on my LTM to which I have an iRule that sends users to different pools depending on a cookie value. I want to allow certain users to hit a specific pool but also want them to do so through Akamai. Since access to Akamai is wide open, I need them to hit my "origin" first and if they match my whitelist, I'll set a cookie and redirect them.

 

 

My initial assumption was that I'd do something like this:

 

 

1. A user hits origin.sample.com/1

 

2. My iRule inserts a cookie named "x" with the value of whatever is behind the / - in this case, a 1.

 

3. The iRule redirects them to www.sample.com (which goes through Akamai) and since they have a cookie value of 1, they'd go to the right pool.

 

 

Unfortunately, I forgot that the cookie "x" with value of "1" would be for the domain "origin.sample.com" and not "www.sample.com" so this likely wouldn't work.

 

 

Can anyone think of a better way to do this? Could I configure an iRule on my origin VS that looks at cookies from a specific domain?