now a days gmail chat worked on the following urls (update on 2/15/2017)

clients6.google.com
hangouts.google.com

its work for me

Thank you

No idea what you're saying...your post makes no sense, and you re-opened this thread. What, exactly, does your post have to do with blocking https with squid???

Hi,

You said, you found reliable solution. I am in urgent need of solution. Please let me know how you fixed and provide the solution.

regards,
Ankit

Read the LQ Rules. You re-opened a thread that had been closed for FIVE YEARS, and was originally opened NINE years ago. If you are in 'urgent need', then why haven't you bothered to read this entire thread, where solutions/advice were posted in post #2??

If you want to block https, then you can use iptables or any firewall to do it. There are abundant sets of documentation on how to do this, including links in this thread...have you looked at any of them? Beyond that, you have given us NO DETAILS about your system(s)/environment at all, and we aren't able to guess. Open your own thread for your own question, and when doing so, provide full details, including showing what you've done/tried so far.