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Forum Discussion

Sugeng_Purnomo_'s avatar
Sugeng_Purnomo_
Icon for Nimbostratus rankNimbostratus
Jun 25, 2014

ASM not working when Implementation Load Balancer (Barracuda) under ASM

now we have a barracuda load balancer and is trying to put after the ASM, the scheme like this: ASM -> Load Balancer (Barracuda) -> Physical Server Physical Server 1 & 2 when access to the ASM, the...
availability
BIG-IP Access Policy Manager (APM)
security
TMOS
TMSH
Cory_50405's avatar
Cory_50405
Icon for Noctilucent rankNoctilucent
Jul 02, 2014

It appears that you have everything in the same network. I suspect asymmetric routing is causing your issue. Your ASM is routing the traffic through the load balancer to the origin servers, but your origin servers will respond directly back to ASM unless some source NAT is performed on the Barracuda load balancer. Your ASM will see responses from the origin servers when it expects to see them coming from the load balancer, so it drops the traffic.

 

I'd recommend checking the Barracuda configuration and configuring source NAT for these communications.