I found the mistake You don't need to route the VPN subnet. PIX will match it and send it through the tunnel.
no route outside 192.168.20.0 255.255.255.0 184.108.40.206 1
Another issue that you don't have a default route on the PIX. You should have a default route on the PIX otherwise it won't know how to reach the other VPN peer.The default route should be like below where X is your default gateway assigned by the ISP.
As I can see in the old configuration you have an internal router. If you desktop default gateway is the internal router you have to add a route for the remote subnet to point to the PIX inside interface on this router.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...