Hi Henningw, Thank you for the response. I understand the original issue was on server mode and SNI. For the client mode and SNI related configurations explanations that i have mentioned in my previous comment, i have mailed the same to sr-users@lists.kamailio.org and waiting for a response. Do you see any problem in my configurations ? Am using kamailio version 5.1.8.
As the problem was related to SNI , i put a comment here, to check if am missing any basic configurations for client mode and SNI.