Download Apache Security by Ivan Ristic PDF

By Ivan Ristic

This all-purpose consultant for locking down Apache fingers readers with the entire info they should securely set up functions. directors and programmers alike will reap the benefits of a concise creation to the speculation of securing Apache, plus a wealth of useful recommendation and real-life examples. subject matters lined contain install, server sharing, logging and tracking, net purposes, Hypertext Preprocessor and SSL/TLS, and more.

With greater than sixty seven% of internet servers operating Apache, it truly is through a ways the main regularly occurring net server platform on the earth. Apache has developed right into a strong method that simply opponents different HTTP servers when it comes to performance, potency, and velocity. regardless of those outstanding features, although, Apache is barely a important instrument if it's a safe one.

To ensure, directors fitting and configuring Apache nonetheless want a sure-fire option to safe it--whether it's operating an enormous e-commerce operation, company intranet, or simply a small pastime site.

Our new advisor, Apache safety, offers directors and site owners simply what they crave--a entire safeguard resource for Apache. effectively combining Apache management and internet safeguard themes, Apache safeguard speaks to just about all people within the box. What's extra, it deals a concise advent to the idea of securing Apache, in addition to a wide standpoint on server safety in general.

But this ebook isn't as regards to conception. the genuine energy of Apache safeguard lies in its wealth of attention-grabbing and useful recommendation, with many real-life examples and options. directors and programmers will learn the way to:

install and configure Apache
prevent denial of provider (DoS) and different attacks
securely proportion servers
control logging and monitoring
secure custom-written internet applications
conduct an online safety assessment
use mod_security and different security-related modules

And that's simply the top of the iceberg, as mainstream Apache clients also will achieve important details on personal home page and SSL/ TLS. essentially, Apache safety is packed and to the purpose, with lots of info for locking down this very hot and flexible internet server.

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Each entry in this table is c(0) = i(cos (0 - ε)+2 cos 0+cos (0+ε)) (1) where 0 is a multiple of ε, which is 2π/256. The entry for 0 is used to calculate cos0 ΐοτθ—ίε^φ^θ+$ε, from cos0 = c(0)-(0-0)s(0) (2) obtaining 5·(0) as c(9—π/2). Evidently the table can be reduced from 256 to 64 numbers at a slight cost in speed. The table length can be reduced to 8 numbers by tabulating cos 0 for Θ = 1\° by 15° steps to 82ψ and using cos0 = (l-i<5 2 )cos0-<5sin0 (3) where δ = φ—θ, to get cos φ from the functions for the 0 value nearest to φ% The next practically useful step in this process is to interpolate in the same way for the whole range 0 to π/2.

6. The exponential functions needed for temperature factors can be treated similarly to the trigonometric functions. A restricted range of x for e~x is all that is normally required and Cruickshank et al (1961) calculate e~x for 0gx<10 by using exp (—x) = exp (—ma) . exp (—nb){\ — c+£c2) (9) where x = ma + nb + c a = 10/8 (10) b = 10/64 The integers w, n are limited to O^m, n

We now describe a program design which is suitable for structure factor calculation in any of the 230 space-groups, in connection with least squares refinement of positions, anisotropie or isotropie vibrations, | Fohs | scale factor, and possibly other parameters such as site occupation factors in disordered structures. It would be difficult to work out rules for deciding whether any given design of routine was the optimum, because considerations of speed, capacity for parameters and reflections, freedom of arrangement of data, generality of symmetry treatment, convenience in face of machine breakdown, and so on, conflict and are hard to weight properly.

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