By Ivan Ristic

ModSecurity guide is the definitive advisor to ModSecurity, a favored open resource internet program firewall. Written by means of Ivan Ristic, who designed and wrote a lot of ModSecurity, this e-book will train you every thing you want to understand to observe the job in your sites and defend them from assault. located among your sites and the area, net software firewalls supply an extra safeguard layer, tracking every little thing that is available in and every thing that is going out. they permit you to accomplish many complicated actions, comparable to real-time program protection tracking, entry regulate, digital patching, HTTP site visitors logging, non-stop passive safety review, and net program hardening. they are often very powerful in combating software defense assaults, corresponding to cross-site scripting, SQL injection, distant dossier inclusion, and others. considering the fact that such a lot sites this day be afflicted by one challenge or one other, ModSecurity guide may also help an individual who has an internet site to run.

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Net> Figure 2-1. x. x/ experimental/ [some stuff you won't care about] tags/ [all official releases, each in own directory] trunk/ The trunk directory always contains the most recent development version. x) may sometimes contain a feature or a fix that has not been released yet. The branches will always be generally stable anyway, and the risk of something breaking is minimal. 22 Chapter 2: Installation Property of Phyllis J. net/svnroot/mod-security/m2/trunk… modsecurity-trunk What you will get in the folder modsecurity-trunk is almost the same as what you get when you download a release.

2 Ampersands in URI attribute values) for convenience. In PHP, for example, it is possible to use any character as a separator. The SecCookieFormat directive selects one of the two cookie parsers available in ModSecurity. Virtually all applications use Netscape-style cookies (sometimes also known as version 0) cookies, so there will be little reason to change this setting: SecCookieFormat 0 Default Rule Match Policy As we’re nearing the end of the configuration, you need to decide what you want to happen when a rule matches.

I generally recommend that you start in detection-only mode, because that way you are sure nothing will be blocked. # Enable ModSecurity, attaching it to every transaction. SecRuleEngine DetectionOnly You will normally want to keep this setting enabled, of course, but there will be cases in which you won’t be exactly sure whether ModSecurity is doing something it shouldn’t be. Whenever that happens, you will want to set it to Off, just for a moment or two, until you perform a request without it running.

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