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bwilliam's avatar
bwilliam
Icon for Cirrus rankCirrus
May 06, 2021

VIP Client Logging "Not RFC1918"

Hi, I have gone through the dev/central site and found an irule capturing VIP client connections . The problem I have is that I don't need to log internal IP space or RFC1918 networks. I want to log ...
devops
iRules
LTM
  • bwilliam's avatar
    bwilliam
    May 11, 2021

    Thank you Alex for the response. I ended up going with this irule. Initially after applying the irule I was still logging the private networks. What I found is that I had to surround the private_net with quotes. After doing this I only saw public networks.

     

    Now I need to send it to a remote syslog instead of logging local0. I just have to research how those lines of code will look like.

     

    when HTTP_REQUEST {
  if { not ([class match [IP::client_addr] equals "private_net"])} {
 
  log local0. "clientIP:[IP::client_addr] accessed
  [HTTP::host][HTTP::uri]"}
}

     

AlexBCT's avatar
AlexBCT
Icon for Cumulonimbus rankCumulonimbus
May 06, 2021

First of all, congrats on your first dip in the iRules pool! :)

 

A couple of suggestions;

  • The bracket on line 4 should be a curly bracket } instead of a square bracket, this is the closing bracket for the one on line 1.
  • The log statement should work the way you have it at the moment, and will log the client address, as well as the full URL.
  • If you want to add the logic to only look for non-private IP's, you can add an "if" statement, similar to this one (the "private_net" is a data group that's already configured on the system with the private IP ranges in it);

 

when HTTP_REQUEST {

if { !([class match [IP::client_addr] equals private_net])} {

log local0. "clientIP:[IP::client_addr] accessed [HTTP::host][HTTP::uri]"

}

}

 

Hope this helps.