SRX & J Series Site-to-Site VPN Configuration Generator: https://www.juniper.net/support/tools/vpnconfig/#localSite
Configuring Route-Based Site-to-Site IPSec VPN on the SRX: https://www.youtube.com/watch?v=4fhLZIbJ-ls
1- IKE Phase 1:
1a- create ike proposal
1b- create ike policy
1c- create ike gateway
2- Allow IKE traffic inbound to untrusted zone
3- IKE Phase 2 / IPSEC :
3a- create ipsec proposal
3b- create ipsec policy
3c- create ipsec gateway
4- Configure security VPN Zone and security policy between zones
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