Question about iked logging

Hi list,

I have a basic VPN setup with iked with certificate authentication.
Periodically, something will attempt to authenticate against it that is
not me and I see the following in the logs:

Jul 5 10:55:47 server iked[15172]: spi=0x7680ddead2051f3c:
ikev2_send_auth_failed: authentication failed for

Just wanted to double-check: is the reason it says "authentication
failed for" without an identity because someone is specifically
attempting certificate authentication against my server and iked is
rejecting them ?

Thanks,

- J