Which of the following OpenVPN configuration options makes OpenVPN forward network packets between VPN clients itself instead of passing the packets on to the Linux host which runs the OpenVPN server for further processing?

Which keyword is used in the Squid configuration to define networks and times used to limit access to the service?

Which of the following PAM modules sets and unsets environment variables?

With fail2ban, what is a 'jail'?

Which BIND option should be used to limit the IP addresses from which slave name servers may connect?