user proxy authentication

Hello,

 

 

I would like the big-ip to perform a user proxy authentication on backend side (node). The incoming client would use the big-ip as a proxy, without any authentication, though the big-ip will do it for him, with fixed authentication credentials to the following proxy.

 

 

The idea is to build a proxy to proxy chain i.e. client --> proxy1 --> proxy2(auth) --> server , where proxy1 is the big-ip with fixed (hardcoded) auth credentials.

 

 

Is the irule the best place to perfom this? Or any other method?

 

 

Thank you very much in advance