February 2003
Intermediate to advanced
986 pages
35h 34m
English
book
Practical UNIX and Internet Security, 3rd Edition
by Simson Garfinkel, Gene Spafford, Alan Schwartz
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Chapter 22: Discovering a Break-In
Don’t panic!
Plan ahead: have response plans designed and rehearsed.
Start a diary and/or script file as soon as you discover or suspect a break-in. Note and timestamp everything you discover and do. Sign these notes.
Run hardcopies of files showing changes and tracing activity. Initial and time-stamp these copies.
Prepare a forensic toolkit with trusted software on a bootable CD-ROM.
Run machine status-checking programs regularly to watch for unusual activity: ps, w, vmstat, etc.
If a break-in occurs, consider making a dump of the system to backup media before correcting anything.
If the break-in occurs over the network, contact the attacker’s ISP by phone.
Carefully examine the system after a break-in. See the chapter for specifics—there is too much detail to list here. Specifically, be certain that you restore the system to a known, good state.
Carefully check backups and logs to determine if this is a single occurrence or is related to a set of incidents.
Trust nothing but hardcopy.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.