source NAT with interface

root@srx320> show configuration security nat
source {
    rule-set nsw_srcnat {
        from zone Internal;
        to zone Internet;
        rule nsw-src-interface {
            match {
                source-address 0.0.0.0/0;
            }
            then {
                source-nat {
                    interface;
                }
            }
        }
    }
}

root@srx320> show configuration system services dhcp-local-server
group jweb-default-group {
    interface irb.0;
}


root@srx320> show configuration access address-assignment
pool jweb-default-pool {
    family inet {
        network 192.168.1.0/24;
        range jweb-default-range {
            low 192.168.1.2;
            high 192.168.1.254;
        }
        dhcp-attributes {
            name-server {
                8.8.8.8;
            }
            router {
                192.168.1.1;
            }
            propagate-settings ge-0/0/0.0;
        }
    }
}