Sams Teach Yourself FreeBSD® in 24 Hours

Q&A

Q1:	I've heard of some institutions (government agencies, research facilities, and so on) that require “one-time passwords”. How do I use those?
A1:	FreeBSD has a mechanism called S/Key that allows users to generate one-time passwords, which only work once each, in response to a “challenge phrase” issued by the login program. Look into the man skey page for details on how this works.
Q2:	How do I secure email services for my users?
A2:	POP3 and IMAP traffic, both of which are common forms of mail delivery for users, can be encrypted using a daemon called stunnel (available in the ports at /usr/ports/security/stunnel). This daemon creates a secure “tunnel” (hence the name) through which regular POP3 and IMAP traffic is piped, after being encrypted ...