{primary:node0}
leon@SRX240> show security ike security-associations 
node0:
--------------------------------------------------------------------------

{primary:node0}
leon@SRX240> show security ipsec security-associations 
node0:
--------------------------------------------------------------------------
  Total active tunnels: 0

{primary:node0}
leon@SRX240> show security flow session 
node0:
--------------------------------------------------------------------------

Session ID: 8, Policy name: self-traffic-policy/1, State: Active, Timeout: 40, Valid
  In: b.b.b.b/4500 --> a.a.a.a/4500;udp, If: reth1.75, Pkts: 233, Bytes: 23454
  Out: a.a.a.a/4500 --> b.b.b.b/4500;udp, If: .local..0, Pkts: 59, Bytes: 18408

Session ID: 59, Policy name: N/A, State: Active, Timeout: N/A, Valid
  In: b.b.b.b/0 --> a.a.a.a/0;esp, If: reth1.75, Pkts: 0, Bytes: 0

Session ID: 60, Policy name: N/A, State: Active, Timeout: N/A, Valid
  In: b.b.b.b/0 --> a.a.a.a/0;ah, If: reth1.75, Pkts: 0, Bytes: 0

Session ID: 4708, Policy name: self-traffic-policy/1, State: Active, Timeout: 4, Valid
  In: a.a.a.a/500 --> b.b.b.b/500;udp, If: .local..0, Pkts: 1, Bytes: 438
  Out: b.b.b.b/500 --> a.a.a.a/500;udp, If: reth1.75, Pkts: 1, Bytes: 474

Total sessions: 9

node1:
--------------------------------------------------------------------------

Session ID: 1, Policy name: N/A, State: Backup, Timeout: N/A, Valid
  In: b.b.b.b/0 --> a.a.a.a/0;esp, If: reth1.75, Pkts: 0, Bytes: 0

Session ID: 2, Policy name: N/A, State: Backup, Timeout: N/A, Valid
  In: b.b.b.b/0 --> a.a.a.a/0;ah, If: reth1.75, Pkts: 0, Bytes: 0
Total sessions: 2

{primary:node0}
leon@SRX240> show configuration security 
ike {
    proposal ike-proposal-HOME {
        authentication-method pre-shared-keys;
        dh-group group5;
        authentication-algorithm sha-384;
        encryption-algorithm aes-256-cbc;
        lifetime-seconds 28800;
    }
    policy ike-policy-HOME {
        mode main;
        proposals ike-proposal-HOME;
        pre-shared-key ascii-text "xxxxxxxxxx"; ## SECRET-DATA
    }
    gateway ike-gate-HOME {
        ike-policy ike-policy-HOME;
        address b.b.b.b;
        external-interface reth1.75;
        version v2-only;
    }
}
ipsec {
    proposal ipsec-proposal-HOME {
        protocol esp;                   
        authentication-algorithm hmac-sha-256-128;
        encryption-algorithm aes-256-cbc;
        lifetime-seconds 3600;
    }
    policy ipsec-policy-HOME {
        perfect-forward-secrecy {
            keys group5;
        }
        proposals ipsec-proposal-HOME;
    }
    vpn ipsec-vpn-HOME {
        bind-interface st0.1;
        ike {
            gateway ike-gate-HOME;
            ipsec-policy ipsec-policy-HOME;
        }
        establish-tunnels immediately;
    }
}
{primary:node0}
leon@SRX240> show configuration interfaces  
unit 1 {
    family inet {
        address 10.10.12.1/30;
    }
}