{master:0}[edit firewall]
root@ex4200# show 
policer rate-limit-test {               
    if-exceeding {                      
        bandwidth-limit 100k;           
        burst-size-limit 1k;            
    }                                   
    then discard;                       
} 

family inet {
    filter filter-in-test {
        term block-icmp {
            from {
                source-address {
                    192.168.2.2/32;
                }
                protocol icmp;
            }
            then {
                count count-icmp;
                reject;
            }
        }
        term block-packets {
            from {
                source-address {
                    192.168.2.0/24;
                }
            }
            then {
                policer rate-limit-test;
                accept;
            }                           
        }                               
        term accept-others {            
            then accept;                
        }                               
    }                                   
                                  
    filter filter-in-50 {               
        term block-packets {            
            from {                      
                source-address {        
                    192.168.50.0/24;    
                }                       
            }                           
            then {                      
                policer rate-limit-test;
                accept;                 
            }                           
        }                               
        term accept-others {            
            then accept;                
        }                               
    }                                   
}                                       
                                      
                                        
{master:0}[edit interfaces]
root@ex4200# show 
ge-0/0/0 {

ge-0/0/3 {                              
    unit 0 {                            
        family inet {                   
            filter {                    
                input filter-in-test;   
            }                           
            address 101.7.152.1/24;     
        }                               
    }                                   
}                                       
ge-0/0/4 {                              
    unit 0 {                            
        family inet {                   
            filter {                    
                input filter-in-50;     
            }                           
            address 101.7.156.2/24;     
        }                               
    }                                   
}