Testing Connectivity to DNS Load Balanced Sites
Question: We need to test HTTPS connectivity to a domain www.example.com that gets resolved into 2 IP addresses 188.8.131.52 and 184.108.40.206. Sometimes the first node replies and sometimes the second. How to we check connectivity consistently from the command line?
Answer: Use the following commands to explicitly test connectivity to first and to second sites:
curl -k -I --resolve www.example.com:443:220.127.116.11 https://www.example.com:443 curl -k -I --resolve www.example.com:443:18.104.22.168 https://www.example.com:443