Full KVM support requires the Java browser plugin (yuck!), so we mostly use them for the big reset button in case a server hangs (it happened about once per year).
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Both cards are running firmware version 3.16, which patched a huge backdoor that would trivially reveal all passwords in plaintext. No kidding. There's a [https://www.supermicro.com/support/resources/bios_ipmi.php?vendor=2&keywords=H8S newer firmware version], but attempts to update to it failed with both Chrome and Firefox. I suspect a bug in their http POST implementation :-(