October 2002
Intermediate to advanced
448 pages
14h 54m
English
Content preview from Building Secure Servers with LinuxBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Resources
The following sources of information address not only security but also many other important aspects of SMTP and MTA configuration.
SMTP Information
ftp://ftp.isi.edu/in-notes/rfc2821.txt. RFC 2821, “Simple Mail Transfer Protocol.” (Useful for making sense of mail logs, SMTP headers, etc.)
http://www.sendmail.org/~ca/email/other/cagreg.html. Shapiro, Gregory Neil. “Very brief introduction to create a CA and a CERT.”. (A bare-bones procedure for generating a Certificate Authority certificate, generating server/client certificates, and using the CA certificate to sign server and client certificates. Handy for people who want to use X.509 mechanisms such as
STARTTLSwithout becoming X.509 gurus.)
Sendmail Information
Costales, Bryan, with Eric Allman. sendmail, Sebastopol, CA: O’Reilly & Associates, 1997. (The definitive guide to Sendmail. Chapters 19 and 34 are of particular interest, as they concern use of the
m4macros — most of the rest of this weighty tome covers the ugly insides ofsendmail.cf).http://www.itworld.com/Net/3314/swol-0699-security/. Fennelly, Carole. “Setting up Sendmail on a Firewall, Part III.” Unix Insider 06/01/1999. (Excellent article on running Sendmail 8.9 and later in a chroot environment.)
http://www.sendmail.net/000705securitygeneral.shtml. Allman, Eric and Greg Shapiro. “Securing Sendmail.” (Describes many built-in security features in Sendmail and offers security tips applicable to most Sendmail installations.)
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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.