When the "Alt hostname" parameter is set to a name that includes an_, the Coder plugin is not able to connect. When attempting to connect, it fails with the error "Contains non-LDH ASCII characters", which appears to refer to the "Alt hostname" parameter. This means there is no way to configure the JetBrains plugin to connect to hosts that present a SAN that includes an_. This configuration doesn't present a problem for the VS Code extension.