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Sampling All FTP Traffic

The following configuration gathers statistical information about a moderate percentage of packets using FTP in the output path of a specific T3 interface, and collects the information in a file named t3-ftp-traffic.txt.

Create a filter:



[edit firewall family inet]
filter ftp-stats {


term ftp-usage {


from {
destination-port [ftp ftp-data];
}




then {
sample;
accept;
}


}


}

Apply the filter to the T3 interface:



[edit interfaces]
t3-7/0/2 {


unit 0 {


family inet {


filter {
input ftp-stats;
}




address 10.35.78.254/32 {
destination 10.35.78.4;
}


}


}


}

Finally, gather statistics on 10 percent of the candidate samples:



[edit forwarding-options]
sampling {


input {


family inet {
rate 10;
}


}




output {


file {
filename t3-ftp-traffic.txt;
files 50;
size 1m;
}


}


}

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