When accessing Netscaler Gateway, we see ERR_CONNECTION_RESET on the browser. Further, when we take a packet capture on Netscaler, we can see the Netscaler resetting the connection with Reset Code (Window) 9821. Further on checking the reason for this reset, we can understand this is due to the SSL feature being disabled on Netscaler.

Enabling the SSL feature on Netscaler can be done from both the GUI and CLI. Below are the steps for the same.

Connect to Netscaler GUI and Enabled SSL feature under Traffic Management > SSL

This can also be done from Netscaler CLI by command:- "enable ns feature SSL" outside shell

Problem Cause

SSL Feature Disabled on Netscaler

https://support.citrix.com/s/article/CTX200852-citrix-adc-netscaler-reset-codes-reference?language=en_US