Beginning ASP.NET Security by Barry Dorrans

By Barry Dorrans

Programmers: defend and shield your internet apps opposed to assault!

You may possibly be aware of ASP.NET, but when you do not know the way to safe your functions, you would like this ebook. This very important advisor explores the often-overlooked subject of educating programmers how you can layout ASP.NET net functions for you to hinder on-line thefts and safety breaches.

You'll commence with an intensive examine ASP.NET 3.5 fundamentals and spot occurs for those who ''don't'' enforce safety, together with a few awesome examples. The publication then delves into the improvement of an online program, strolling you thru the susceptible issues at each part. discover ways to issue safety in from the floor up, find a wealth of advice and top practices, and discover code libraries and extra assets supplied by means of Microsoft and others. indicates you step-by-step tips on how to enforce the very most up-to-date protection innovations finds the secrets and techniques of secret-keeping--encryption, hashing, and ''not'' leaking details firstly Delves into authentication, authorizing, and securing periods Explains the way to safe net servers and internet prone, together with WCF and ASMX Walks you thru danger modeling, so that you can expect difficulties bargains most sensible practices, strategies, and tendencies you could placed to exploit instantly

Defend and safe your ASP.NET 3.5 framework websites with this must-have consultant

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Example text

Proxy servers can be used to cache responses, serving them to multiple clients who request the same resource, thus reducing the amount of Internet bandwidth used. Proxy servers can also provide basic security functions, hiding the client machine from the Internet, and keeping details of the requesting host private. When activated, Fiddler configures the browsers to route all requests through itself, and logs the request. It then forwards the request onward, accepts the response, logs the response, and, fi nally, returns the response to the browser.

If your application is hacked, then these systems may be exposed to the attacker. By using several layers of defensive techniques in your application such as input validation, secure SQL construction, and proper authentication and authorization, your application will be more resilient against attack. Never Trust Input As you discovered in the example attack earlier in this chapter, a simple change to an input into the application may result in a security breach. Input is everything that comes into your application during run-time — user data entry, the click of a button, data loaded from a database or remote system, XML fi les, anything you cannot know about at the time your application is compiled.

An attacker will begin by discovering the platform the application is running under. This is normally easy to determine from the format of the application URLs, and the fact that Web servers tend to advertise their software name and version when you connect to them. The platform may drive certain assumptions. For example, if the hosting platform is Windows, the database used by an application hosted on it is very likely Microsoft SQL Server. From there, attackers will look at the pages available to them and the parameters sent with each page, either in the URL or via HTML forms.

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