CompTIA Linux+ Portable Command Guide: All the commands for the CompTIA XK0-004 exam in one compact, portable resource, 2nd Edition

Chapter 16. Given a scenario, configure and implement appropriate access and authentication methods

This chapter provides information and commands concerning the following topics:

PAM

• Password policies

• LDAP integration

• User lockouts

• Required, allowed, or sufficient

• /etc/pam.d/

• pam_tally2

• faillock

SSH

• ~/.ssh/

• known_hosts

• authorized_keys

• config

• id_rsa

• id_rsa.pub

• User-specific access

• TCP Wrappers

• /etc/ssh/ (ssh_config, sshd_config)

• ssh-copy-id

• ssh-keygen

• ssh-add

TTYs

• /etc/securetty

• /dev/tty#

PTYs

PKI

• Self-signed

• Private keys

• Public keys

• Hashing

• Digital signatures

• Message digest

VPN as a client

• SSL/TLS

• Transport mode

• Tunnel mode

• IPSec

• DTLS

PAM

PAM (Pluggable Authentication Modules) is already used by almost all the Linux utilities that ...