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dyobbs_25515's avatar
dyobbs_25515
Icon for Nimbostratus rankNimbostratus
Apr 17, 2017

DNS Requests / Sec per IP

Is there a way to get the number of DNS requests per sec in a BIG-IP on a per IP basis? What command to use get have it on chronological order?

 

application delivery
BIG-IP DNS
LTM
  • Kevin_Davies_40's avatar
    Kevin_Davies_40
    Icon for Nacreous rankNacreous
    Apr 17, 2017

    Attached this to your DNS listener

    when CLIENT_DATA {
    table set -subtable [IP::client_addr] [TMM::cmp_unit][clock clicks] 0 1
    table set -subtable tracking [IP::client_addr] 0 5
}

    Attached this to a HTTP virtual server with HTTP profile

    when HTTP_REQUEST {
  if {[HTTP::uri] eq "/stats"} {
    set response ""
    foreach IP [table keys -subtable tracking] {
      append response "$IP Count [table keys -subtable tracking -count]\r\n"
    }
    HTTP::respond 200 content $response Content-Type "text/plain" Connection Close
  }
}

    The first collects the statistics, the second allows you to see them from a virtual server.

    • dyobbs_25515's avatar
      dyobbs_25515
      Icon for Nimbostratus rankNimbostratus
      Apr 19, 2017

      Thanks Kevin, put the first irule on my DNS listener and created a VS with HTTP profile and put in the 2nd irule. Pardon me. How to see the stats per IP? I went into the browser . Is that how to see results?

       

    • Kevin_Davies_40's avatar
      Kevin_Davies_40
      Icon for Nacreous rankNacreous
      Apr 19, 2017

      Yes however their is a typo. Inside the foreach loop the subtable name needs to be $IP and not tracking.

      append response "$IP count [table keys -subtable $IP ....