What command is used to reload a set of saved netfilter rules?

Which of the following daemons will monitor log files for inappropriate activity, such as login
attempts, from remote IP addresses and will add netfilter rules to block the offending address?

With fail2ban what is a ‘jail’?

Which command can be used when writing scripts which perform tests against remote services?

Which of the following commands can be used to connect and interact with remote services?
(Choose TWO correct answers.)

Which configuration block in Nginx is used to define settings for a reverse proxied web server?

When trying to reverse proxy a web server through Nginx, what keyword is missing from the
following configuration sample?
<code>
location / {
_________ http://proxiedserver:8080;
}
</code>

When trying to reverse proxy a web server through Nginx, what keyword is required to pass the
Host header from the original request to the proxied server?
<code>
… {
_________ Host $host
…
}
</code>

With Nginx, which of the following directives is used to proxy requests to a FastCGI application?

CORRECT TEXT
What parameter in the sshd configuration file instructs sshd to prevent specific user names from
logging in to a system? (Please specify the parameter only without settings.)