In this book we use several abbreviations for SUSE and Red Hat products, as well as for the Security-enhanced Linux kernel from NSA.
Security-enhanced Linux is abbreviated SELinux.
SUSE LINUX Enterprise Server is abbreviated SLES, and you will see frequent mention of SLES8, SLES9 and SLES8/9. SUSE products include:
SUSE LINUX 9.1 Personal
SUSE LINUX 9.1 Professional
SUSE LINUX Desktop
SUSE LINUX Enterprise Server 8
SUSE LINUX Enterprise Server 9
SUSE LINUX Openexchange Server 4.1
Red Hat products are also referred to by their abbreviated forms. Red Hat Enterprise Linux Server 3.0 is referred to as RHEL, and Red Hat Enterprise Linux Advanced Server 3.0 is called RHAS. Red Hat Linux products include:
Red Hat Linux 9
Red Hat Fedora Core 1
Red Hat Fedora Core 2
Red Hat Enterprise Linux Server 3.0
Red Hat Enterprise Linux Advanced Server 3.0
The authors would
It takes time to develop and deploy a comprehensive hardening plan. Meanwhile systems may already be compromised or may not be operating properly. They may be leaking information, be busy
Stop and do this now. Test the system to determine its status. If you find evidence of an unauthorized intrusion, presence of malware of the presence of a root kit, or of evidence of attack, use approved
| Heads Up |
Before you attempt to recover a system that has been compromised, sit down and count the costs and the final results. You should consider which is more cost effective, to reinstall or to recover. Past experience suggests that the real cost of recovery is often more than double the initial estimate. The cost of reinstallation is often premised on a worst-case scenario. In other words, there is a tendency to underestimate the costs of system recovery and to overestimate the costs of reinstallation. In addition, it is wise to consider the possibility that a compromised machine may have hidden backdoors installed. When evidence of one successful attack is
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