Authentication with modules. Everything is possible. The micro-course discusses the PAM system being a modular system for verifying user rights to working with the system. By default this mechanism checks the login and the password given by the user in /etc/passd and /etc/shadow files. However, with according plug-ins the procedure of verification may be freely changed and data about the login or password can be stored in any place. Keywords: PAN, NSS, Modular Authentication system , pam_unix, /etc/pam.d, session, account, password, auth The PAM mechanism The principle of operation of the PAM mechanism

When Practical Unix Security was first published more than a decade ago, it became an instant classic. Crammed with information about host security, it saved many a Unix system administrator from disaster. The second edition added much-needed Internet security coverage and doubled the size of the original volume. The third edition is a comprehensive update of this very popular book - a companion for the Unix/Linux system administrator who needs to secure his or her organization's system, networks, and web presence in an increasingly hostile world.Focusing on the four most popular Unix variants today--Solaris, Mac OS X, Linux, and FreeBSD--this book contains new information on PAM (Pluggable Authentication Modules), LDAP, SMB/Samba, anti-theft technologies, embedded systems, wireless and laptop issues, forensics, intrusion detection, chroot jails, telephone scanners and firewalls, virtual and cryptographic filesystems, WebNFS, kernel security levels, outsourcing, legal issues, new Internet protocols and cryptographic algorithms, and much more.Practical Unix & Internet Security consists of six parts: Computer security basics: introduction to security problems and solutions, Unix history and lineage, and the importance of security policies as a basic element of system security. Security building blocks: fundamentals of Unix passwords, users, groups, the Unix filesystem, cryptography, physical security, and personnel security. Network security: a detailed look at modem and dialup security, TCP/IP, securing individual network services, Sun's RPC, various host and network authentication systems (e.g., NIS, NIS+, and Kerberos), NFS and other filesystems, and the importance of secure programming. Secure operations: keeping up to date in today's changing security world, backups, defending against attacks, performing integrity management, and auditing. Handling security incidents: discovering a break-in, dealing with programmed threats and denial of service attacks, and legal aspects of computer security. Appendixes: a comprehensive security checklist and a detailed bibliography of paper and electronic references for further reading and research. Packed with 1000 pages of helpful text, scripts, checklists, tips, and warnings, this third edition remains the definitive reference for Unix administrators and anyone who cares about protecting their systems and data from today's threats.

Can I get connected to Active Directory? Yes, you can. Can I connect PAM to SAMBA? You can, too. The micro-course discusses the rules of integration of the PAM mechanism with the SAMBA server. It is necessary if the administrator wants to authenticate users on the basis of data contained in the Active Directory bases of the Microsoft Windows server or if it wants to authorize SAMBA users on the basis of the PAM model instead of its own files with mapping and password. Keywords: PAM, Samba, WINS, Winbind, smb.conf Integration of the PAM mechanism with the SAMBA server Integration of the SAMBA server with the PAM service Installation and configuration Configuration of SAMBA Configuration of PAM Setting the client Authentication of the Linux system users in Microsoft Windows The Winbind packet Configuration

Setting parameters and variables while verifying the user is so simple now. The micro-course discusses PAM plug-ins enabling setting the environment parameters. It describes the plug-ins: pam_group, pam_timestamp, pam_umask, pam_loginuid, pam_mkhomedir, pam_env. Keywords: environmental variables, PAM, session, pam_group, pam_timestamp, pam_umask, pam_loginuid, pam_mkhomedir, pam_env PAM mechanism – setting the parameters of the working environment The pam_group plug-in The pam_timestamp plug-in The pam_umask plug-in The pam_loginuid plug-in The pam_mkhomedir plug-in The pam_env plug-in

PAM should be configured – as the result may be a great surprise. The micro-course describes installation and configuration of the PAM system. Moreover, there is a list of basic plug-ins available with the original packet. Keywords: PAM, util-linux, shadow, pam.conf, auth, account, session, password, common-password, pam.d, /etc/pam.d Configuration of the PAM system Installation of the PAM system Configuration of the PAM system Libraries and plug-ins

Passwords should be stored in the database – if there are many of them, as well as other information about users. The micro-course contains information about user authorization on the basis of data contained in the MySQL database. Moreover, it describes the way of using the PAM mechanism by Internet service servers such as Proftpd and Apache, thanks to which authorization to them can also take place through data contained in the SQL database. Keywords: pam_myssql, pam, database, user, password, proftpd Integration of services with the PAM system Using the MySQL database for authorization Configuration Identification with the use of the MySQL database Integration of services with the PAM library Modification of Proftpd configuration

Limiting resources on the logging level? Yes, it is possible. The micro-course describes PAM plug-ins used for setting limits and rights, i.e. the plug-ins: pam_limits oraz pam_cap. Keywords: PAM, pam_limits, pam_cap PAM mechanism –setting limits and rights The pam_limits plug-in The pam_cap plug-in