Enforce IP filtering on ESXi
My ESXi is provided by Online.net and accessible from Internet. Reading the VMware documentation, one can see: ESXi includes a firewall that is enabled by default. At installation time, the ESXi firewall is configured to block incoming and outgoing traffic, except traffic for services that are enabled in the host’s security profile. But the default security profile is way too loose! So here’s how to harden it a bit.