I'm trying to set up a config very similar to the one described here:

https://kb.juniper.net/InfoCenter/index?page=content&id=KB28198

which is basically: route-based VPN between SRX and ASA with multiple subnets 
behind SRX and single subnet behind ASA.

Difference in my situation is I need to set up 4 subnets behind the SRX as 
opposed to 2 in the example. I think that means similar setup to example, but 
creating 3 virtual-router instances as opposed to 1.

Anyway, I think I understand the example, but I had some questions I hoped 
someone could answer:

* It seems to me the interface-routes object, the rib-groups object and the 
policy-statement object are all required to allow the return traffic to 
192.168.3.0/24 subnet in its own virtual router.

If that is the case, why does the rib-group import both inet.0 and ASA.inet.0?

Should it not just need import ASA.inet.0 which actually has the route to 
192.168.3.0/24?

Secondly, I have some questions about the policy statement:

* In my case, I have 4 subnets behind SRX I want to pass over vpn. Can I just 
add extra subnets as term 2, term 3, term 4 in the existing policy-statement?

* the route-filter in the policy-statement has an 'exact' suffix after the 
subnet. Is that required?
In my case, one of the subnets I want to permit over the vpn is a /20 with 16 
/24s within. How should I create the route-filter? As a /20 but without the 
'exact'? would the 'orlonger' match type be what I should be using?

Why would you put in the 'exact' in any case?
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