EDNS support by Google's Public DNS
Just was looking around at EDNS support by Google. To find how it supports and how packet looks like I created a test NS records for dnstest.anuragbhatia.com pointing to one of test server (178.238.225.247). I wasn’t running any DNS server on the server. Just ran quick tcpdump.
At server end:
sudo tcpdump 'port 53 and dst 178.238.225.247' -nn -vvv -w sample.pcap
Then I forcefully triggered DNS queries via Google’s recursor using:**