# Limitations

Some PAM modules and authentication mechanisms are case-sensitive, while others are not. Usernames in the ThinLinc client are case-sensitive by default, however this behavior can be changed. See `LOWERCASE_LOGIN_NAME` in Client configuration parameters for details.

The SSH server should be configured to allow “keyboard-interactive” authentication for full functionality. The “password” authentication method does not allow multiple interactive prompts, which are required for things such as password changes during login.