If your administrator has allowed the Credential Caching policy, you can enable or disable it via the Remember Credential checkbox on the Connect Tunnel Options dialog. If enabled (checked) on Linux, the policy works while Connect Tunnel is running. In macOS, the information is stored in the keychain and persists across reboots.
If Secure Network Detection is enabled, Connect Tunnel is put into one of three states when connecting to an appliance for the first time: