Juniper SRX configuration for DHCP client (WAN side) and DHCP Server (LAN side)

juniper-srx.conf

## Last commit: 2017-07-29 17:20:42 GMT by root
version 12.1X46-D66.1;
system {
    host-name cable-router;
    domain-name example.com;
    time-zone Europe/London;
    root-authentication {
        encrypted-password "xxx";
    }
    name-server {
        8.8.8.8;
        8.8.4.4;
    }
    name-resolution {
        no-resolve-on-input;
    }
    services {
        ssh;
        web-management {
            http {
                interface vlan.0;
            }
            session {
                idle-timeout 60;
            }
        }
        dhcp-local-server {
            group dhcp-lan-group {
                interface vlan.0;
            }
        }
    }
    syslog {
        archive size 100k files 3;
        user * {
            any emergency;
        }
        file messages {
            any critical;
            authorization info;
        }
        file interactive-commands {
            interactive-commands error;
        }
    }
    max-configurations-on-flash 5;
    max-configuration-rollbacks 5;
    license {
        autoupdate {
            url https://ae1.juniper.net/junos/key_retrieval;
        }
    }
    ntp {
        server uk.ntp.pool.org;
    }
}
interfaces {
    fe-0/0/0 {
        unit 0 {
            description "Cable Modem";
            family inet {
                dhcp-client;
            }
        }
    }
    interface-range interfaces-trust {
        member fe-0/0/1;
        member fe-0/0/2;
        member fe-0/0/3;
        member fe-0/0/4;
        member fe-0/0/5;
        member fe-0/0/6;
        member fe-0/0/7;
        unit 0 {
            family ethernet-switching {
                vlan {
                    members vlan-trust;
                }
            }
        }
    }
    vlan {
        unit 0 {
            family inet {
                address 192.168.0.1/24;
            }
        }
    }
}
protocols {
    stp;
}
access {
    address-assignment {
        pool dhcp-lan-pool {
            family inet {
                network 192.168.0.0/24;
                range dhcp-lan-range {
                    low 192.168.0.50;
                    high 192.168.0.250;
                }
                dhcp-attributes {
                    name-server {
                        8.8.8.8;
                        8.8.4.4;
                    }
                    router {
                        192.168.0.1;
                    }
                }
            }
        }
    }
}
security {
    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 source-nat-rule {
                    match {
                        source-address 0.0.0.0/0;
                        destination-address 0.0.0.0/0;
                    }
                    then {
                        source-nat {
                            interface;
                        }
                    }
                }
            }
        }
    }
    policies {
        from-zone trust to-zone untrust {
            policy trust-to-untrust {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
    }
    zones {
        security-zone trust {
            interfaces {
                vlan.0 {
                    host-inbound-traffic {
                        system-services {
                            ping;
                            dhcp;
                            http;
                            https;
                            ssh;
                        }
                    }
                }
            }
        }
        security-zone untrust {
            interfaces {
                fe-0/0/0.0 {
                    host-inbound-traffic {
                        system-services {
                            ping;
                            dhcp;
                        }
                    }
                }
            }
        }
    }
}
vlans {
    vlan-trust {
        vlan-id 3;
        l3-interface vlan.0;
    }
}