@roshanmathewst ,
might be you are using only dartstock, This problem is faced by various traders around diff'nt platforms on upstox.
i think this is the problem related to RTD link that they provide to their partner platform as well API users.
"dartfeed.upstox.com" USED THIS CONNECTION AS WELL AND ITS WORKING WITHOUT PUTTING THE FILE IN EXCEPTION LIST OF ANTIVIRUS. THANK YOU DEVELOPERS FOR THAT.