By: utlemming

April 1, 2009 7:14 am

PXE Booting NFS or iSCSI Roots for a Diskless Environment

Ever wondered how to boot a server with NFS as root? Or how to implement iSCSI as root with out having a iSCSI initiator card? This AppNote discusses and shows you how to implement a PXE Boot server to boot NFS and iSCSI on root installations.

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By: utlemming

November 7, 2008 12:12 pm

Implementing MPIO over iSCSI: Considerations, Common Issues and Clustering Concerns

Interested in implementing MPIO over iSCSI and then building a cluster on it? Well, this feature article explores some of the concerns and some recommendations to build a solid, stable MPIO over iSCSI solution, especially if implementing OCFS2 and NCS.

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By: utlemming

September 12, 2008 1:40 pm

IPSEC: Implementing Server-to-Server Encryption of TCP/IP Connections

Under a variety of circumstances, it is desirable to encrypt data between multiple computers. One of the beauties of open source is that there is a multiplicity of answers. Unfortunately, with those answers comes some confusion. Often times, people overlook some solutions, and one of those solutions is the use of IPSEC transport mode for server to server communications.

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By: utlemming

September 5, 2008 4:32 pm

stunnel: Securing the Insecure with SSL and Creating SSL Tunnels

Just about every system administrator comes across a time when there is a need to encrypt some service. Perhaps your mail program just can’t handle it. Or maybe you need to take a non-SSL aware VNC server and make it SSL-aware. Maybe you’re just paranoid. For such moments in system administrating there is “stunnel.”

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By: utlemming

June 27, 2008 4:32 pm

SLES 10 SP2 networking under Xen, troubleshooting and recommendations

Under SLES 10 SP2, the networking components changed. With those changes there are questions about best practices, methods and how it works. This AppNote seeks to provide a little clarity, including a simplified Xen bridge recommendation.

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By: utlemming

June 25, 2008 12:46 pm

Enabling UID 0 logins via LDAP or other external authentication source

In some cases, system administrators need to enable UID 0 login for LDAP and other authentication sources. However, SUSE Linux by default prohibits that behavior. With a little tweaking of the PAM stack, you can have UID 0 logins without giving away the local root password!

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By: utlemming

March 21, 2008 2:14 pm

Xen Network Bridges Explained with Troubleshooting Notes

Xen network bridges can be complex and overwhelm the newcomer to Xen. This article addresses the design of Xen network bridges from a troubleshooter’s approach. This guide seeks to explain the cause and fix of several common problems including implementing the network-multinet script.

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By: utlemming

January 25, 2008 5:08 pm

Implementing boot.crypter for USB token/password authentication of encrypted hard drives and swap space

In some cases, physical security cannot always be secured. Using LUKS for disk encryption and the tool, boot.crypter, you can safely and securely encrypt data using USB tokens or a password.

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