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Monitoring Remote VPN tunnels through a VPN

I am looking to see if this is possible, which in my limited Cisco knowledge I believe it is.

Essentially I am looking for a way to monitor NATed VPN tunnels through another tunnel in the same address subnet space.

I have a monitoring server which I can detect our tunnels here at our HDQ, to all of my remote sites this is just a simple ping monitor that will tell me if the tunnels go down or that the remote sites ISP is down. We have a 2nd VPN tunnel at all our locations that our POS software connects through a 3rd party.

This device is a PIX Firewall the HDQ device is an ASA 5512 w/ 5505 Router

The ACL's as they stand are an example below.

access-list inside_outbound_nat0_acl   permit ip 192.168.1.x   192.168.x.x
access-list outside_cryptomap_20         permit ip 192.168.1.x   192.168.x.x
access-list outside_cryptomap_40         permit ip 10.99.x.x   10.x.x.x
access-list example_acl                            permit ip 192.168.1.x    10.x.x.x

nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 1 0 0
static (inside,outside) 10.99.x.x access-list example_acl 0 0
route outside gateway 1

I have a ICMP statement allowing my monitoring server to ping the device through our tunnel

icmp permit host x.x.x.x inside

management-access inside

I know I should probably setup an acl for this as well. That can come later.

Now what I am looking to do is ping the: 10.99.x.x Address Space from the 192.168.x.x address through the 192.168.1.x inside address. Can this be done with ACL's or some route statements?

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