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Tony2020's avatar
Tony2020
Icon for Nimbostratus rankNimbostratus
May 25, 2017

Better way to match different URI based on XFF and different data group with IP

Hi All,

 

I was wondering if anyone can point out or suggest a better or more effcient way to put together the two logic together in this code.

 

Data group:

 

  1. Data group with IP 1.1.1.1/32 & 1.1.1.2/32 & 5.5.5.0/24 called "DG-XFF-EXTERNAL-ALLOWED-IP"
  2. Data group with IP 2.2.2.1/32 and 2.2.2.2/32 called "DG-XFF-INTERNAL-ALLOWED-IP"

Requirement:

 

  1. if the external users IP is in "DG-XFF-EXTERNAL-ALLOWED-IP" and they go to URI "/externalURI" they are allowed in based on XFF IP matching, otherwise they will be rejected

     

  2. if users IP is in "DG-XFF-INTERNAL-ALLOWED-IP" and they go to URI "/internalURI" they are allowed in based on XFF IP matching, otherwise the will be rejected

     

irule

when HTTP_REQUEST {

 

set CHECK_IP [getfield [HTTP::header values X-Forwarded-For] " " 1]
      switch -glob [HTTP::uri] {
             “/externalURI“ {
           if { ! ([class match $CHECK_IP eq DG-XFF-EXTERNAL-ALLOWED-IP) } {
             reject       
           }
        }

     switch -glob [HTTP::uri] {
             “/InternalURI“ {
           if { ! ([class match $CHECK_IP eq DG-XFF-INTERNAL-ALLOWED-IP) } {
             reject       
           }
        }
      }
    }

Thank you!

 

application delivery
iRules
LTM
  • JG's avatar
    JG
    Icon for Cumulonimbus rankCumulonimbus
    May 25, 2017

    Try this modified one:

    when HTTP_REQUEST {
    foreach CHECK_IP [split [string map [list " " ""] [HTTP::header "X-Forwarded-For"]] ","] {
        switch -glob [string tolower [HTTP::path]] {
            "/externaluri" {
                if { ! ([class match $CHECK_IP eq DG-XFF-EXTERNAL-ALLOWED-IP]) } {
                    reject
                }
            }
            "/internaluri" {
                if { ! ([class match $CHECK_IP eq DG-XFF-INTERNAL-ALLOWED-IP]) } {
                    reject
                }
            }
            default {
            }
        }
    }
}

    .