In addition, if an incorrect configuration directive is provided, the sshd server may refuse to start out, so be specifically careful when modifying this file on a distant server. Two additional settings that should not have to be modified (furnished you've not modified this file before) are PubkeyAuthentication and ChallengeResponseAuthentication. https://landenbimqs.snack-blog.com/29824731/how-much-you-need-to-expect-you-ll-pay-for-a-good-servicessh