January 2005
Intermediate to advanced
544 pages
23h 44m
English
Content preview from Linux Server Security, Second Edition
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The Web Server
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317
I still use Apache 1.3 with PHP. Since most users are still working with 1.3, that’s
what will be used in the examples in this chapter, with some 2.0 notes where needed.
The book Apache Security (O’Reilly) has more details on security for 2.0.
Build Time: Installing Apache
Attacks are so frequent on today’s Internet that you don’t want to leave a window for
attack, even for the few minutes it takes to set up a secure server. This section covers
setting up your environment and obtaining the right version of Apache.
Setting up your firewall
A public web server is commonly located with email and nameservers in a DMZ,
between outer and inner firewalls. You want to configure access for two classes of
visitor:
• The public, visiting your site from the Internet
• Web administrators, who may be coming from the outside, inside, or another
server in the DMZ
Web servers normally listen on TCP ports 80 (http:) and 443 (secure HTTP, https:).
While you’re installing Apache and the pieces are lying all around, block external
access to these ports at your firewall (with iptables or other open source or com-
mercial tools). If you’re installing remotely, open only port 22 and use ssh. After
you’ve configured Apache, tightened your CGI scripts (as described in this chap-
ter), and tested ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.