Implementing Client Subnet DNS Requests

Problem this snippet solves: Update 2018-10-23: As of BIG-IP DNS 14.0 there is now a checkbox feature for edns-client-subnet. Please see: Using Client Subnet in DNS Requests. The following is stil...
Published Jun 16, 2015
Version 1.0
BIG-IP DNS
devops
iRules
gbbaus_104974's avatar
gbbaus_104974
Historic F5 Account
Feb 28, 2018

As an FYI for anyone testing, using a recent DIG version (eg 9.10), the "+subnet" is used to send a ENDS0 request , eg:

 

$ dig @10.1.10.53 +subnet=205.168.2.3/32

 

The response should show

 

;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096

 

; CLIENT-SUBNET: 205.168.2.3/32/0

 

;; QUESTION SECTION: