Don't work dest nat for FTP

[MikhailS]

Don't work destination NAT for my FTP server. Connection with internet via ADSL modem that connect to SRX. IP-address FTP 172.30.0.20/32

interfaces {
    ge-0/0/0 {
        description "To LAN(Cisco 2960)";
        vlan-tagging;
        unit 4 {
            description "To LAN";
            vlan-id 4;                  
            family inet {
                address 172.30.0.230/24;
            }
        }
  
    fe-0/0/7 {
        description "To WAN(ADSL Modem)";
        unit 0 {
            family inet {
             
                address 62.118.2.205/26;
            }
        }
    }
    vlan {
        unit 0 {
            family inet {
                address 192.168.1.1/24;
            }
        }                               
    }
}
routing-options {
    static {
        route 0.0.0.0/0 next-hop 62.118.2.193;
        route 172.30.1.0/24 next-hop 172.30.0.1;
    }
}
security {
    nat {
        source {
            rule-set rs1 {
                from zone trust;
                to zone untrust;
                rule r1 {
                    match {
                        source-address 0.0.0.0/0;
                        destination-address 0.0.0.0/0;
                    }
                    then {
                        source-nat {    
                            interface;
                        }
                    }
                }
                rule r2 {
                    match {
                        source-address 172.30.0.111/32;
                    }
                    then {
                        source-nat {
                            off;
                        }
                    }
                }
            }
        }
        destination {
            pool FTP {
                address 172.30.0.20/32 port 20;
            }
            pool FTP-command {
                address 172.30.0.20/32 port 21;
            }                           
            rule-set FTP {
                from zone untrust;
                rule ftp-data {
                    match {
                        destination-address 62.118.2.205/32;
                        destination-port 20;
                    }
                    then {
                        destination-nat pool FTP;
                    }
                }
                rule ftp-command {
                    match {
                        destination-address 62.118.2.205/32;
                        destination-port 21;
                    }
                    then {
                        destination-nat pool FTP-command;
                    }
                }
            }
        }
    }                                   
    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;
            }
        }
    }
    zones {
        security-zone trust {           
            host-inbound-traffic {
                system-services {
                    all;
                }
                protocols {
                    all;
                }
            }
            interfaces {
                vlan.0;
                ge-0/0/0.4;
            }
        }
        security-zone untrust {
            screen untrust-screen;
            host-inbound-traffic {
                system-services {
                    all {
                        except;
                    }
                }
                protocols {
                    all {               
                        except;
                    }
                }
            }
            interfaces {
                fe-0/0/7.0;
            }
        }
    }
    policies {
        from-zone trust to-zone untrust {
            policy trust-to-untrust {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
        from-zone untrust to-zone trust {
            policy untrust-to-trust {
                match {
                    source-address any;
                    destination-address any;
                    application any;
                }
                then {
                    permit;
                }
            }
        }
    }
}
firewall {
    family inet {
        filter external {
            term ssh_from_outside {
                from {
                    port 22;
                }
                then {
                    discard;
                }                       
            }
        }
    }
}
applications {
    application RDP {
        protocol tcp;
        destination-port 3389;
    }
    application SMTP {
        protocol tcp;
        source-port smtp;
        destination-port 25;
    }
    application DNS application-protocol dns;
    application FTP application-protocol ftp;
}

[Screenie]

My guess is you need a proxy-arp for 172.30.0.20 on interface ge-0/0/0. You configure this in security nat proxy-arp. And you should have enough on one nat rule, the ftp alg should take care of translating the data stream when you only configure the command stream.