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AIX security commands, Part 1: General, LDAP, and Kerbos commands
Security is an important aspect of the AIX operating system. Follow along with this quick reference guide on AIX Security commands to learn more.
Also available in: Chinese  
Articles 22 Jul 2008
AIX security commands, Part 2: Advanced AIX security commands
Management of system administration is always a tedious task. Various tools and methods are available to handle administrative activities on a system. AIX 6.1 provides different security features that help to manage user and group administration and maintain integrity on a system. This articles provides a list commands which are enabled using these features.
Also available in: Chinese  
Articles 25 Oct 2011
Network File System Version 4 security: Kerberos and LIPKEY mechanisms
Use the enriched security features of Network File System (NFS) Version 4 to pave your way to public key technology. In this article, you'll examine the NFS Version 4 built-in security schemes, and how to use the existing Kerberos authentication database in a LIPKEY security mechanism. You'll also find out how to take the first steps for a migration or extension from Kerberos to the LIPKEY security mechanism.
Articles 26 Apr 2006
AIX security reporting
Generating IBM AIX security reports should reflect the current security model overview of your system, and these reports can then be presented to managers or audit to show how your AIX system is managed with regards to security. In this article, I will demonstrate what type of attributes could be collected and why.
Also available in: Chinese   Russian  
Articles 03 Sep 2012
Security authentication mechanism in AIX
Authentication mechanism verifies which users are allowed to access a system. Administrator can define authentication protocol; based on that protocol, users' credentials are verified, and users are given access to the system. AIX provides several authentication and identification modules. A user's authentication and identification are done based on the user's attributes on AIX. This article covers the user's authentication and identification attributes, load modules available in AIX, and a new authentication attribute introduced AIX 6.1 Tl07 and AIX 7.1 Tl1 releases.
Also available in: Chinese   Russian  
Articles 15 Nov 2011
Beat the AIX Security Expert gotchas
The AIX Security Expert (AIXPert) makes implementing security a breeze, but it does have some traps for the uninitiated. Once you're aware of them, AIXPert is a natural choice for security hardening. So, if you want to secure your system without leaving yourself locked out in the rain, this article is for you.
Also available in: Chinese  
Articles 19 Apr 2011
Getting started with SSH security and configuration
Are you a new UNIX(R) administrator who needs to be able to run communication over a network in the most secure fashion possible? Brush up on the basics, learn the intricate details of SSH, and delve into the advanced capabilities of SSH to automate securely your daily system maintenance, remote system management, and use within advanced scripts to manage multiple hosts.
Also available in: Chinese   Russian  
Articles 09 May 2014
Security considerations over distributed environment using DCE security framework
Most of the businesses today are running over a distributed environment. Security and integrity of the data flowing over the network is, therefore, of utmost importance for the business units. The DCE security framework essentially does the same for such business needs. Most of the present day distributed environment based business services are using the basics of DCE security. Primarily the DCE security service, with additional new services and facilities, is based on the Kerberos system. This article is targeted to understand the basic concepts and implementation of security mechanisms being used in distributed environment and how the whole idea of DCE security is related to Kerberos.
Also available in: Chinese  
Articles 15 Jun 2010
AIX V6.1 security and regulatory compliance
IBM AIX Version 6.1 is packed with security enhancements. Many of these features can be mapped with the security requirements laid by the regulatory compliances for federal, financial, and health care sectors. This article looks at AIX V6.1 security features and their mapping with the security criteria that can be derived from some of the compliances. The article helps security practitioners to get a compartmentalized view of the features and why AIX V6.1 can be a system to consider for a compliance-driven industry.
Also available in: Chinese  
Articles 12 Jan 2010
Multi-security mechanisms with multifactor authentications
Authentication is a key component of security-based solutions. This article discusses the risk associated with the use of the same security mechanisms in multifactor authentication systems and the use of GSS-API as a suitable option for achieving the multi-security mechanism with multifactor authentication for enhanced security for solutions designed over UNIX.
Also available in: Chinese  
Articles 10 Mar 2009
Using AIX Security Expert
AIXPert is an all-purpose GUI and command-line security tool that incorporates over 300 security configuration settings. Learn about recent enhancements implemented with AIX V6.1, including SOX auditing support, and go through real scenarios to show how AIXPert can be used from the command line, smit, and the GUI.
Also available in: Chinese   Russian  
Articles 09 Dec 2008
Securing AIX Network Services
Better understand the network services in AIX and the impact each one has on system security. Administrators responsible for RS/6000s connected in some way to a public network can use the information in this tutorial to achieve the necessary balance between functionality and security.
Tutorial 24 Dec 2001
Configure an IPsec environment using the Kerberos authentication mechanism
Kerberos is an authentication mechanism used to authenticate a set of users by having different security realms and by exchanging ticket over a secured or non-secured environment. Internet Protocol Security (IPsec) is a security protocol used to establish a secured channel over interacting systems. The IPsec security protocol allows the use of Kerberos for user authentication and to have a secured communication channel established between two client systems. This article explains how we can use IPsec as a security protocol to communicate between two client systems and how we can configure IPsec with Kerberos authentication between these systems.
Articles 28 Jul 2017
Introducing IBM PowerSC 1.1.5
IBM PowerSC provides a security and compliance solution optimized for virtualized environments on IBM Power Systems running PowerVM and AIX. The newest release makes managing security compliance easier than ever with an improved user interface. Try it today.
Articles 04 Nov 2016
Deploying OpenSSH on AIX
This tutorial is designed for administrators of IBM RS/6000 systems who wish to improve the security and integrity of their servers running AIX by replacing standard insecure network services with those provided by the OpenSSH implementation of the Secure Shell protocol.
Tutorial 01 Jun 2001
Exploring IKEv2 with ECDSA certificate in IBM AIX
Internet security is a major concern now-a-days. Internet Protocol Security (IPSec) is a security protocol suite which works on the L3 layer of network and provides a strong security with the help of different types of authentication and encryption mechanisms. This article discusses about the usage of the Elliptic Curve Digital Signature Algorithm (ECDSA) certificate based authentication mechanism for Internet Key Exchange Version 2 (IKEv2).
Articles 23 Jul 2014
Secure LPM: Live Partition Mobility with IPSec
In plain Live Partition Mobility (LPM), transfer of memory contents of the source logical partition (LPAR) goes unprotected over the network. Secure LPM provides an option to administrators to choose whether or not to transfer memory contents through an Internet Protocol Security (IPSec) tunnel. This article explains the steps to configure secure LPM and provides an overview of the available security profiles that mandate the creation of automatic tunnels. It also covers the concepts, prerequisites, and hardware and software configuration along with screen captures.
Articles 27 Mar 2014
Getting started with Nmap for system administrators
Nmap is an open source port scanner for Linux® and many other platforms that can boost your system's security. This article discusses the basics of Nmap for system administrators and how to get started using it.
Also available in: Russian  
Articles 24 Mar 2014
Strengthening the SSH configuration used in GPFS installations to make them more secure
Currently, a prerequisite of any IBM General Parallel File System (IBM GPFS) installation is that all the nodes on the cluster must be able to communicate with each other using the root user ID and that this is done without a password in order to facilitate automated tasks. But this configuration represents a security exposure, because security best practices forbid that the root user can log in remotely. The configuration presented in this article resolves this dilemma by allowing the GPFS cluster nodes to continue communicating with each other using the root ID and at the same time blocking this type of connection to other users and nodes.
Articles 19 Sep 2013
Simplify and centralize IPSec management on AIX
Internet Protocol Security (IPSec) helps you secure your data, but implementing IPSec tunnels in a large enterprise with many systems can be a daunting task. In this article, learn to use the centralized IPSec management feature in AIX to manage IPSec configuration for large numbers of client machines. Examples show how to simplify and centralize management of a configuration using LDAP as a central repository.
Also available in: Chinese   Russian  
Articles 15 Jul 2013
Getting grips with fpm
Using the File Permissions Manager (fpm) allows you to trim down the programs that should not be SUID or SGID enabled in your view. Thus, allowing only privileged users to run these programs. This use of fpm is part of the ever-growing IBM AIX security policy to help system administrators in hardening their system.
Also available in: Chinese  
Articles 07 Aug 2012
More locks for your SSH door
Security isn't an exact science, so the more difficulties you can put in a hacker's way, the better. This article considers how to enhance Secure Shell (SSH) access by eliminating passwords and using public/private key pairs instead. The article also explores how to recognize and block possible attacks, including brute-force and dictionary attacks, by denying server access to origins that are identified as unsafe.
Also available in: Spanish  
Articles 27 Sep 2011
The IBM AIX operating system is an open standards-based UNIX operating system. It provides a highly scalable IT infrastructure for client workloads ranging from small department systems to enterprise-class workloads, such as data mining, database, transaction processing, and high-performance computing. The latest version, AIX 7.1, includes significant new capabilities for virtualization, security features, availability features, and manageability. AIX V7.1 is the first generally available version of AIX 7.
Also available in: Chinese  
Articles 07 Sep 2010
Three locks for your SSH door
Security always requires a multi-layered scheme. SSH is a good example of this. Methods range from simple sshd configuration through the use of PAM to specify who can use SSH, to application of port-knocking techniques, or to hide the fact that SSH access even exists. Applying these techniques can make life much harder for possible intruders, who will have to go past three unusual barriers.
Also available in: Chinese   Russian  
Articles 31 Aug 2010
Heterogeneous IPSec solution between AIX and Windows
Internet security is a major concern. Internet Protocol Security (IPSec) is a framework for a set of protocols that helps you implement security at the IP packet level. IPSec works across heterogeneous environments to create secure tunnels for safer transactions. This article talks about what you can gain from configuring IPSec to a heterogeneous environment between AIX and Windows.
Also available in: Chinese  
Articles 24 Aug 2010
Extending the capability of secldap to authenticate from multiple data sources
The secldapclntd daemon establishes connection between an LDAP server and the AIX security LDAP module. Usual steps to configure a secldapclntd daemon with LDAP server allows us to provide multiple replicated LDAP server details during configuration. However, there can be a situation when the information for all the users is not available in only one LDAP server. In such a scenario, configuring just one active LDAP server details might not be sufficient. To resolve this limitation, this article demonstrates the usage of the pass-through authentication feature in IBM Tivoli Directory Server. The steps listed in this article can be followed to configure a setup such that AIX security module will be able to seek authentication information from multiple data sources and yet hide the backend server details from the client, hence ensuring abstraction and security.
Also available in: Chinese  
Articles 01 Jun 2010
IBM AIX TCP Traffic Regulation
IBM AIX TCP Traffic Regulation (TR), introduced in IBM AIX 6.1 TL2, provides centralized port-based regulation of TCP connection resource utilization. TCP firewall profiles, customized by a security administrator, can now be loaded into the AIX kernel for active mitigation of TCP-based Denial-of-Service (DoS) attacks.
Also available in: Chinese  
Articles 01 Dec 2009
High scalability and availability of AIX secldapclntd using the Tivoli Directory Server proxy
The secldapclntd daemon provides and manages connection between the AIX security LDAP load module of the local host and an LDAP server, and handles transactions from the LDAP load module to the LDAP server. Simple configuration steps do not allow us to specify highly available and scalable LDAP servers at the back end. This article lists the steps to configure a highly available and scalable back-end LDAP for the secldapclntd daemon using the Tivoli Directory Server proxy.
Also available in: Chinese   Portuguese  
Articles 01 Sep 2009
Role-based access control in simple steps
Security is a major concern of operating systems. This article series provides an understanding of the new features on AIX, role-based access control and multi-level security. Part 1 of this series discusses AIX role-based access control (RBAC) and how roles, responsibilities, and the authorization of a root user can be delegated to more than one user.
Also available in: Chinese  
Articles 23 Jun 2009
Secure file transfer in a heterogeneous environment
File transfer is an essential and important activity in the day-to-day computing world. Security lapses during file transfer can invite leak important data to the external world. As a result, securing FTP is of primary importance. Hence, in AIX V6.1, IBM has introduced a secure flavor of FTP (and ftpd), based on OpenSSL, using Transport Layer Security (TLS) to encrypt both the command and the data channels of file transfer. This article shows the advantage of using this AIX V6.1 feature and its usage between AIX and other heterogeneous systems that already support this feature. This article focuses on AIX secure FTP with a Windows server.
Also available in: Chinese  
Articles 14 Apr 2009
Implement two-factor authentication for AIX using Kerberos
In the ever-growing need for higher security systems, multi-factor authentication is preferred for network security. Since Kerberos is one of the most popular network authentication mechanisms, learn how to design a multi-factor authentication over the Kerberos protocol. Understand the use of One-Time Password (OTP) and GSS-API to achieve this.
Also available in: Chinese  
Articles 04 Nov 2008
Tcsh shell variables
Tcsh is one of the most popular UNIX shells. Learn how you can use tcsh shell variables to make your work easier and take advantage of tcsh's advanced security features.
Also available in: Chinese  
Articles 26 Aug 2008
Take a closer look at OpenBSD 4.3
OpenBSD provides a UNIX distribution with a primary emphasis on security and cryptography. If you're looking for a UNIX distribution to deploy in the most critical nexus in your network infrastructure, look no further than OpenBSD. The recent release of OpenBSD -- version 4.3 -- includes several new features and bug fixes that this article reviews.
Also available in: Chinese  
Articles 12 Aug 2008
Understanding EFS
Safeguard your data with the Encrypted File System (EFS), a new AIX(R) 6.1 security feature, and get a comprehensive picture on the configuration of EFS and its usage. EFS can store the content of a file in an encrypted format at the file system level. If you’re new to EFS, this article is a good starting point for reviewing the need for EFS, its features, and most commonly used commands.
Also available in: Chinese  
Articles 29 Jan 2008
System Administration Toolkit: Network scanning
Discover how to scan your network for services and how to regularly monitor your services to keep uptimes to a maximum. A key way of ensuring the security of your network is to know what is on your network and what services individual machines are at risk of exposure. Unauthorized services, such as Web servers or file sharing solutions, not only degrade performance, but others can use these services as routes into your network. In this article, learn how to use these same techniques to ensure that genuine services remain available.
Also available in: Chinese   Russian  
Articles 04 Dec 2007
Configuring Network Information Service server and client on AIX
Security and user and group management are important aspects with respect to any operating system. In distributed networks, one of the most important tasks is to maintain the user and group information. For centralized management, many customers use Network Information Service (NIS). This article provides an overview of NIS and the steps to install and configure NIS as a server and client.
Also available in: Chinese   Russian  
Articles 27 Nov 2007
Install and configure NIS+
Ease your system administration tasks and use Network Information Service plus (NIS+) to quickly handle maintenance and security issues for information. NIS+ is a network-wide naming and administration service that works on a client-server model. The server maintains all the details of the users and clients in a central database. In this article, get step-by-step instructions on how to install, configure, and administer NIS+.
Also available in: Chinese   Russian  
Articles 28 Aug 2007
Kerberos authentication for AIX Version 5.3 Network File System Version 4
Find out how to use application programming interfaces (APIs) when writing your own custom Kerberos-based authentication applications. Network File System Version 4 (NFS V4), the up and coming enterprise file system, uses the Kerberos security mechanism to address privacy, authentication, and integrity requirements. In this article, you'll examine different Kerberos credential cache name formats that AIX(R) NFS V4 supports and are required for authentication purposes. You'll also look at different methods of obtaining the Kerberos credential.
Articles 05 Dec 2006
Tunneling with SSH
Use OpenSource tools, such as Secure Shell (SSH), PuTTY, and Cygwin, to create secure connections to almost any resource you need to access. Current information on SSH tunneling and setup is fragmented and limited to specific applications, or it is written at a system administrator's level. With increasing security needs, the addition of boundary firewalls, and tightening of the number of allowed network ports, users need a method that is simple to configure, easy to operate and, above all, secure to accomplish day-to-day tasks and access the services that they have become accustomed to. This article describes the setup of a simple SSH client connecting to an AIX(R)- or Linux(R)-based SSH server that allows a typical, technically literate individual the ability to set up, configure, and operate a flexible means of tunneling data and services over the SSH service.
Also available in: Chinese  
Articles 17 Oct 2006
Get the latest version of OpenSSH for AIX
OpenSSH is a free software tool that supports SSH1 and SSH2 protocols. It's reliable and secure and is widely accepted in the IT industry to replace the r-commands, telnet, and ftp services, providing secure encrypted sessions between two hosts over the network. Get information in this article about OpenSSH version 3.4p1.
Articles 10 Feb 2006
Securing your DB2 file systems with EFS
From AIX 6.1 onwards, user created filesystems can now be encrypted, which is implemented at the file system level. This approach allows for some applications to be encrypted, with not much overhead maintenance. One such product that can be used for data encryption is DB2. The need to encrypt application data is becoming more common, especially if backups are taken and are moved off site, or the application resides on external sites. SOX even recommends that to maintain the confidentially of the data, encryption should be strongly considered. This article demonstrates how to create a DB2 database and encrypt it under AIX and looks at common EFS commands.
Also available in: Chinese  
Articles 25 Oct 2011
AIX V6.1 Remote Login Session Management
Regulatory compliances require systems to implement automatic logoff of sessions to enable secure environment. UNIX based solutions tend to make extensive use of utilities like FTP, TELNET and SSH whose sessions are required to be configured for automatic timeout. This article explains the relationship between automatic logoff and various regulatory compliances. Subsequently, it steps through the administrative procedure required to configure it for FTP, TELNET and SSH over AIX V6.1.
Also available in: Chinese  
Articles 22 Jun 2010
10 tips for sensible systems administration
Benjamin Franklin: scientist, scholar, statesman, and . . . systems administrator? Yes, 200 years or so before the birth of UNIX, Franklin scribed sage advice to keep systems humming. Here are 10 of Franklin's more notable tips.
Also available in: Chinese  
Articles 10 Mar 2009
Perform uniform mounting with generic NFS
To efficiently achieve uniform mounting in the presence of multiple, simultaneous NFS version exports, you need a generic NFS mount utility. Learn how a generic NFS mount utility can help reduce handling multiple NFS versions and simplify the management of those versions. The article describes the concept of the generic NFS mount, outlines the advantages and applications of the system, and gives some overall design details.
Also available in: Russian   Japanese  
Articles 11 Feb 2009
Changing UIDs and GIDs
It's important to know what happens to file ownership in AIX once you make a UID or GID change. If you don't understand the results of altering a UID or GID, you could cause serious issues to your server and environment.
Also available in: Chinese  
Articles 04 Mar 2008
Take a closer look at OpenBSD
OpenBSD is quite possibly the most secure operating system on the planet. Every step of the development process focuses on building a secure, open, and free platform. UNIX(R) and Linux(R) administrators take note: Without realizing it, you probably use tools ported from OpenBSD every day. Maybe it's time to give the whole operating system a closer look.
Also available in: Chinese  
Articles 08 Aug 2006
Secure communication with Kerberized OpenSSH on AIX Version 5.3 using Windows Kerberos service
Discover how you can configure the Kerberized Open Secure Shell (OpenSSH) on AIX(R) Version 5.3 machines that have Microsoft(R) Active Directory Server to act as the Key Distribution Center (KDC). OpenSSH encrypts traffic, including passwords, to eliminate eavesdropping, taking over your connection, or peeking into your data. If you work in a hybrid environment with multi-vendor solutions on AIX Version 5.3 systems, then you'll find this article extremely useful.
Also available in: Chinese   Russian  
Articles 13 Jun 2006
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