version 15.1X49-D60.7;
system {
    host-name SRX320;
    time-zone Europe/London;
    root-authentication {
        encrypted-password "<password>";
    }
    name-server {
        8.8.8.8;
        8.8.4.4;
    }
    services {
        ssh;
        telnet;
        xnm-clear-text;
        netconf {
            ssh;
        }
        dhcp-local-server {
            group jdhcp-group {
                interface irb.0;
            }
        }
        web-management {
            https {
                system-generated-certificate;
            }
        }
    }
    syslog {
        archive size 100k files 3;
        user * {
            any emergency;
        }
        file messages {
            any notice;
            authorization info;
        }
        file interactive-commands {
            interactive-commands any;
        }
    }
    max-configurations-on-flash 15;
    max-configuration-rollbacks 15;
    license {
        autoupdate {
            url https://ae1.juniper.net/junos/key_retrieval;
        }
    }
    ntp {
        server 64.99.80.121 prefer;
    }
}
security {
    address-book {
        global {
            address network_trust 192.168.1.0/24;
            address network_company1 10.10.1.0/24;
            address network_company2 10.0.0.0/24;
            address company1_sbs 10.10.1.100/32;
            address company1_sw 10.10.1.101/32;
            address company2_sbs 10.0.0.1/32;
        }
    }
    screen {
        ids-option untrust-screen {
            icmp {
                ping-death;
            }
            ip {
                source-route-option;
                tear-drop;
            }
            tcp {
                syn-flood {
                    alarm-threshold 1024;
                    attack-threshold 200;
                    source-threshold 1024;
                    destination-threshold 2048;
                    timeout 20;
                }
                land;
            }
        }
    }
    nat {
        source {
            rule-set trust-to-untrust {
                from zone trust;
                to zone untrust;
                rule trust-to-untrust-access {
                    match {
                        source-address 192.168.1.0/24;
                        source-address-name [ network_trust network_company1 network_company2 ];
                        destination-address 0.0.0.0/0;
                    }
                    then {
                        source-nat {
                            interface;
                        }
                    }
                }
            }
            rule-set company1-to-untrust {
                from zone company1;
                to zone untrust;
                rule company1-to-untrust-access {
                    match {
                        source-address 10.10.1.0/24;
                        destination-address 0.0.0.0/0;
                    }
                    then {
                        source-nat {
                            interface;
                        }
                    }
                }
            }
            rule-set company2-to-untrust {
                from zone company2;
                to zone untrust;
                rule company2-to-untrust-access {
                    match {
                        source-address 10.0.0.0/24;
                        destination-address 0.0.0.0/0;
                    }
                    then {
                        source-nat {
                            interface;
                        }
                    }
                }
            }
        }
        destination {
            pool company1-sbs-rdp {
                address 10.10.1.100/32 port 3389;
            }
            pool company1-sw-rdp {
                address 10.10.1.101/32 port 33899;
            }
            pool company2-rdp {
                address 10.0.0.10/32 port 3389;
            }
            rule-set company1-sbs-rdp {
                from zone [ trust untrust company1 ];
                rule company1-sbs-rdp {
                    match {
                        destination-address *.*.131.198/32;
                        destination-port {
                            3389;
                        }
                    }
                    then {
                        destination-nat {
                            pool {
                                company1-sbs-rdp;
                            }
                        }
                    }
                }
            }
            rule-set company1-sw-rdp {
                from zone [ trust untrust company1 ];
                rule company1-sw-rdp {
                    match {
                        destination-address *.*.131.198/32;
                        destination-port {
                            33899;
                        }
                    }
                    then {
                        destination-nat {
                            pool {
                                company1-sw-rdp;
                            }
                        }
                    }
                }
            }
            rule-set company2-rdp {
                from zone [ company2 untrust ];
                rule company2-rdp {
                    match {
                        destination-address *.*.138.218/32;
                        destination-port {
                            3389;
                        }
                    }
                    then {
                        destination-nat {
                            pool {
                                company2-rdp;
                            }
                        }
                    }
                }
            }
        }
    }
    policies {
        from-zone trust to-zone trust {
            policy trust-to-trust {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
        from-zone trust to-zone untrust {
            policy trust-to-untrust {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
            policy allow-trust-clients {
                match {
                    source-address [ network_trust network_company2 ];
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
        from-zone company1 to-zone untrust {
            policy allow-company1-clients {
                match {
                    source-address network_company1;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
        from-zone company1 to-zone company2 {
            policy company1-to-company2-block {
                match {
                    source-address network_company1;
                    destination-address network_company2;
                    application any;
                }
                then {
                    deny;
                }
            }
        }
        from-zone company2 to-zone company1 {
            policy company2-to-company1-block {
                match {
                    source-address network_company2;
                    destination-address network_company1;
                    application any;
                }
                then {
                    deny;
                }
            }
        }
        from-zone company2 to-zone trust {
            policy company2-to-trust-block {
                match {
                    source-address network_company2;
                    destination-address network_trust;
                    application any;
                }
                then {
                    deny;
                }
            }
        }
        from-zone trust to-zone company2 {
            policy trust-to-company2-block {
                match {
                    source-address network_trust;
                    destination-address network_company2;
                    application any;
                }
                then {
                    deny;
                }
            }
        }
        from-zone trust to-zone company1 {
            policy trust-to-company1-allow {
                match {
                    source-address network_trust;
                    destination-address network_company1;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
        from-zone company1 to-zone trust {
            policy company1-to-trust-allow {
                match {
                    source-address network_company1;
                    destination-address network_trust;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
    }
    zones {
        security-zone trust {
            host-inbound-traffic {
                system-services {
                    all;
                }
                protocols {
                    all;
                }
            }
            interfaces {
                irb.0;
            }
        }
        security-zone untrust {
            screen untrust-screen;
            interfaces {
                ge-0/0/0.0 {
                    host-inbound-traffic {
                        system-services {
                            dhcp;
                            tftp;
                        }
                    }
                }
            }
        }
        security-zone company1 {
            host-inbound-traffic {
                system-services {
                    all;
                }
                protocols {
                    all;
                }
            }
            interfaces {
                ge-0/0/2.0 {
                    host-inbound-traffic {
                        system-services {
                            ping;
                            ssh;
                            http;
                            https;
                        }
                    }
                }
            }
        }
        security-zone company2 {
            host-inbound-traffic {
                system-services {
                    all;
                }
                protocols {
                    all;
                }
            }
            interfaces {
                ge-0/0/3.0 {
                    host-inbound-traffic {
                        system-services {
                            ping;
                            ssh;
                            https;
                        }
                    }
                }
            }
        }
    }
}
interfaces {
    ge-0/0/0 {
        unit 0 {
            family inet {
                address *.*.131.198/30;
            }
        }
    }
    ge-0/0/1 {
        unit 0 {
            family ethernet-switching {
                vlan {
                    members vlan-trust;
                }
            }
        }
    }
    ge-0/0/2 {
        unit 0 {
            family inet {
                address 10.10.1.1/24;
            }
        }
    }
    ge-0/0/3 {
        unit 0 {
            family inet {
                address 10.0.0.254/24;
            }
        }
    }
    irb {
        unit 0 {
            family inet {
                address 192.168.1.1/24;
            }
        }
    }
}
routing-options {
    static {
        route 0.0.0.0/0 next-hop *.*.131.197;
    }
}
protocols {
    l2-learning {
        global-mode switching;
    }
}
access {
    address-assignment {
        pool junosDHCPPool {
            family inet {
                network 192.168.1.0/24;
                range junosRange {
                    low 192.168.1.2;
                    high 192.168.1.254;
                }
                dhcp-attributes {
                    router {
                        192.168.1.1;
                    }
                    propagate-settings ge-0/0/0.0;
                }
            }
        }
    }
}
applications {
    application MS-RDP {
        protocol tcp;
        destination-port 3389;
    }
    application MS-RDP-ALT {
        protocol tcp;
        destination-port 33899;
    }
}
vlans {
    vlan-trust {
        vlan-id 5;
        l3-interface irb.0;
    }
}