Virtual GTM Health Monitors through Cisco ASA to public IP address
Hi guys,
I have a proof of concept lab set-up where I have two stand-alone Virtual GTM/LTM's and my aim is to load-balance using the GTM's (active/active) to a LTM Virtual server.
On the back the back-end I have three VM's listening on port 80 and a Virtual server set up to hit the pool using round-robin and that all works fine as expected.
I have also provisioned the GTM modules on the same VE's and have configured two Data Centres each with the GTM servers configured along will all the necessary Virtual servers/Pools using the same public IP address on each GTM. All the DNS configuration has been set up so when I hit a URL it sends the DNS query to the GTM's which are NAT'd through a Cisco ASA and the GTM's respond back with the correct public IP address of the website which is also NAT'd through the Cisco ASA to the LTM Virtual server.
The problem that I have is that the GTM's can't use the gateway ICMP monitor or a HTTP monitor from behind the Cisco ASA (inside) to the Public IP Address on the (Outside) the is by design. So the million dollar question is how can I monitor the pool members on the Public IP address?
Also should this work without the monitors in place as I seem to hit the Virtual server using the public DNS?
Thanks in advance
Matt