Issue

When trying to update IntelliJ from Help > Check for Updates..., it shows the following error message.

Connection failed (java.security.cert.CertificateException: No name matching www.jetbrains.com found). Please check network connection and try again.

Solution

Since I'm behind a proxy server, therefore, to resolve this issue, I have to setup the proxy settings. Here is how I did it.

1. Navigate to File > Settings > Appearance & Behavior > System Settings > HTTP Proxy.
2. Check Auto-detect proxy settings option.
3. That's it!