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Test de fuzzing en ingénierie logicielle

Test de fuzzing en ingénierie logicielle

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Le fuzzing est une technique d’ingénierie logicielle qui consiste à tester le logiciel en envoyant des données aléatoires pour trouver des erreurs. Essayons de comprendre les avantages et les inconvénients du test de fuzzing!

Fuzzing, également connu sous le nom de test de fuzz, est une technique de test logiciel automatisée qui consiste à fournir des données invalides, inattendues ou aléatoires (fuzz) en tant qu’entrées d’un programme informatique. L’objectif est de trouver des erreurs de codage, des bugs, des vulnérabilités de sécurité et des failles qui peuvent être exploitées. Cet article commence par expliquer quelques types de fuzzing de base. La métaphore «tester la serrure» est ensuite utilisée pour expliquer les rouages de cette technique. Une liste d’outils disponibles est donnée et un ensemble de meilleures pratiques est exploré pour que le fuzzing soit mené de manière éthique, efficace et sûre.

Black-box fuzzing is the most common type of fuzzing. It does not require any knowledge about the internal architecture of the software being tested. The tester only needs to provide the input data and observe the output. This type of fuzzing is suitable for testing applications with a user interface, such as web browsers, media players, and office applications.

White-box fuzzing requires knowledge about the internal architecture of the software being tested. The tester needs to understand the code and identify the areas that need to be tested. This type of fuzzing is suitable for testing complex applications, such as operating systems, databases, and network protocols.

Métaphore du Test de la Serrure

La métaphore du test de la serrure est utilisée pour expliquer le fonctionnement de la technique de fuzzing. Cette métaphore compare le processus de fuzzing à un test pour vérifier si une serrure est ouverte ou fermée. Dans ce scénario, le tester est le cambrioleur et la serrure est le logiciel à tester. Le but du cambrioleur est d’ouvrir la serrure en essayant différentes clés. Dans le cas du fuzzing, le tester envoie des données aléatoires au logiciel pour voir si elles peuvent le faire planter ou révéler des vulnérabilités.

Le processus de fuzzing commence par la génération de données aléatoires. Ces données sont ensuite envoyées au logiciel pour tester sa robustesse. Si le logiciel fonctionne correctement, les données sont rejetées et le processus recommence avec des données différentes. Si le logiciel plante ou révèle une vulnérabilité, le tester peut identifier le problème et le corriger.

Le fuzzing est une technique très efficace pour trouver des bugs et des vulnérabilités dans un logiciel. Cependant, il est important de comprendre l’architecture du logiciel pour pouvoir l’utiliser correctement et efficacement. Une bonne compréhension de l’architecture du logiciel permet de cibler les zones à tester et d’améliorer les résultats.

Outils et Pratiques Recommandées

Il existe plusieurs outils disponibles pour effectuer des tests de fuzzing. Certains outils sont spécialisés pour tester des applications spécifiques, tandis que d’autres sont plus génériques et peuvent être utilisés pour tester tout type d’application. Les outils les plus populaires sont Sulley, Peach Fuzzer, SPIKE, American Fuzzy Lop (AFL) et Boofuzz.

En plus des outils disponibles, il existe certaines pratiques recommandées pour effectuer des tests de fuzzing de manière éthique, efficace et sûre. Il est important de bien documenter le processus de test et d’informer les développeurs des résultats obtenus. Il est également important de ne pas divulguer les résultats du test à des tiers sans l’autorisation des développeurs. Enfin, il est important de respecter la loi et les règles en vigueur lors de l’exécution des tests.

Le fuzzing est une technique très puissante qui peut être utilisée pour trouver des bugs et des vulnérabilités dans un logiciel. Cependant, il est important de comprendre l’architecture du logiciel et d’utiliser les bons outils et pratiques pour obtenir les meilleurs résultats. Une bonne compréhension de l’architecture et une utilisation appropriée des outils et pratiques peuvent aider
Source de l’article sur DZONE

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3 Best Website Uptime Monitoring Tools 

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An unreliable, semi-broken and unresponsive website is an excellent way to lose leads and visitors — regardless of how aesthetically pleasing or well-designed, the visual elements are.

Over the past decade, we’ve seen more initiative to deliver faster internet to regions of the world that were previously devoid of it. With online communities expanding and more people becoming receptive to online shopping, ensuring your site’s dependability is now more important than ever. 

One way to achieve this is by employing uptime and downtime monitoring tools. This guide will examine the best ways to get alerts when something goes wrong and your website falters.

Why Is Website Uptime Monitoring Important?

Downtime is bound to occur occasionally. Nonetheless, the goal is to minimize it. The longer the downtime occurs, the more traffic and potential clients you lose. A dysfunctional website is also detrimental to your credibility and reputation. People may associate your website’s unreliability with your real-world products or services.

With web developers charging an average of $200 per hour, high-quality websites can be expensive to build and maintain. Nevertheless, it’s often worth the investment. However, an unreliable website can backfire on you. Instead of attracting more customers, it could potentially repel them. This can result in lost revenue.

An uptime monitoring solution can help you prevent or reduce these losses. It verifies if your website is up and functional and notifies you if it’s not. This allows you to troubleshoot the issue and get your website back up and running as soon as you’re alerted. The most common issues behind your website’s downtime include: 

  • Server faults;
  • Network outages;
  • Power outage;
  • Traffic spikes;
  • Cyberattacks;
  • Domain name issues;
  • An erroneous web application deployment;
  • Increased server loads;
  • DNS Resolve issues;
  • Human error.

Thus, you must employ a dependable tool that detects downtime or any interruptions related to your website as soon as they occur. They are must-have tools for web designers, developers, and network administrators. However, not all of them are built the same. So how do you identify the best uptime monitoring tools?

Essential Features of Uptime Monitoring Tools

Uptime monitoring tools typically detect interruptions by running network tests such as pings and trace routes. You could practically monitor your website’s uptime by constantly running these tests yourself. 

However, this isn’t an efficient way to monitor your website’s uptime. A comprehensive uptime monitoring tool will automatically monitor your website’s uptime in the background. It will then alert you through various channels as soon as it senses that your website may be down. 

Furthermore, high-quality uptime monitoring solutions tend to offer additional information regarding your website’s uptime/downtime and its performance. These tools commonly feature dashboards, status pages, badges, exportable records, etc., to help you keep track of your site’s overall health.

9 Best Features of an Uptime Monitoring Solution

The ideal uptime monitoring tool or service should feature: 

  1. Website security features that notify of and repel potential cyber attacks;
  2. 24/7 uninterrupted background website monitoring;
  3. Multi-channel alerts (email, SMS, push notifications, instant messages, social media, etc.);
  4. Report generation;
  5. 24/7 customer support available through different channels (email, phone, chat, etc.);
  6. Be capable of monitoring multiple websites and proxies at the same time;
  7. Offer insights and suggestions to improve your website’s performance;
  8. Be affordable;
  9. High customizability should allow you to choose which features to enable and disable.

Another optional feature to look out for is public status pages that your clients can access to determine if all your services are up and running. GetWeave is an excellent example of this. The website features a well-organized systems status page where customers can check if all of Weave’s services are functional. 

Nevertheless, you can use the above information as a buying guide when assessing potential uptime monitoring tools. The rest of this guide will supply a few suggestions as to which tools you should use for your website.

3 Best Website Uptime Monitoring Tools 

Some of the best uptime monitoring tools for website downtime alerts include:

1. Uptrends

Uptrends isn’t just a downtime detection tool; it’s a complete web performance monitoring solution. It will notify you as soon as it detects any disturbance in your website’s performance. It features highly customizable checks. For instance, you can set performance check limits for load times. Uptrends will notify you instantly if your website takes too long to load.

You can also configure from which locations you want it to monitor your website. Uptrends will then point you to where your website usually suffers performance dips in the real world. 

The service uses multiple communication channels to send users notifications: email, phone calls, and SMS. Alternatively, you can download one of Uptrend’s mobile applications and receive push notifications. Additionally, you can integrate Uptrends with messaging and communication applications such as PagerDuty, Slack, and Microsoft Teams.   

Another impressive Uptrend feature is its ability to emulate your website’s performance on different browsers. It runs Google Chrome, Mozilla Firefox, and Microsoft Edge on its servers. Thus, you can compare how your website runs on these web browsers without installing them on your servers or computer. 

Uptrends supplies users with various charts, reports, and graphs to help identify sudden spikes or dips. Waterfall reports display the complete page-load from the initial request to the last download. This allows you to compare the history of your website’s performance element by element. It comes with three price plans whose costs depend on the number of monitors you would like. Starting at $16.21 (at the time of writing) the Starter Plan is the most affordable.

2. Oh Dear

Oh Dear is a slightly cheaper option than Uptrends, with the most affordable plan starting at $12 per month (at the time of writing). However, while Uptrends offers a 30-day free trial, Oh Dear only provides a 12-day trial period. Nevertheless, Oh Dear’s interface is a lot cleaner and more minimal. 

Since Oh Dear runs servers in different locations across the globe, it can track how your website performs in various regions. Oh Dear will scan through your website and index all the pages. If it detects any issues, it will alert you immediately. 

Oh Dear also features a continuous certificate monitoring function. Site owners who are concerned with their website’s security may find this feature to be especially useful. It will verify your SSL certificate expiration dates and alert you of any changes.  

Oh Dear’s public status page enables your clients to keep track of your website’s availability.

Oh Dear uses email and SMS text messages to alert site owners of any issues. It also features integrations with communications and social media applications such as Telegram, Discord, Slack, Microsoft Teams, etc. Oh Dear ensures that messages are as detailed and user-friendly. This makes it easier to troubleshoot and find the origin of your problem. Oh Dear is more than a worthy alternative to Uptrends. 

3. WP Umbrella

WP Umbrella is a little different from the previous entries. It’s intended to help users manage and monitor multiple WordPress sites. Thus, it is far more particularized in its approach to website uptime monitoring. Again, as is the primary function of the uptime monitoring tool, it offers a real-time alert system that will contact you through email, SMS, Slack, etc. 

WP Umbrella employs a simple minimal UI. Its main screen consists of a dashboard that allows you to view all your WordPress websites. By default, this dashboard features four columns: Site, Uptime, Speed, and Issues.

WP Umbrella will alert you of any outdated or erroneous plugins or themes. While it doesn’t offer dedicated public status pages, it does have a client report generation feature. You can automatically send these reports to your various subscribers or clients when your website is down. 

WP Umbrella is the most affordable option on this list. Users are charged $1.99 per month (at the time of writing) for each website monitored. In addition, WP Umbrella offers a 14-day trial and does not require your credit card details. It’s an excellent option for anyone running a WordPress website or two.

Conclusion

This guide has only explored three possible uptime monitoring solutions. They won’t only assist you in detecting downtimes, they can also help you find the reason your site may be slow.

These solutions are an excellent place to start. But there are many other options coming to market all the time. You may find that this is the first step to converting more leads and reducing your bounce rate. 

Source

The post 3 Best Website Uptime Monitoring Tools  first appeared on Webdesigner Depot.

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Understanding Cross Browser Testing and Responsive Testing

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Introduction

The Internet is inevitable in the current time. It is everywhere, and the entire world depends on it to function, perform day-to-day activities and stay connected with people from different corners. Gone are the days when testers only chose to create websites for selected browsers and hardly faced issues maintaining a website on a few browsers. As the technology matured, many significant players entered the browser market. Even the users evolved, became tech-savvy, and improved their browsing habits. Now was a time when businesses were in critical need of cross-browser testing and responsive testing to stay ahead of the competition. Cross-browser testing focuses on the website’s overall functionality; responsive web testing verifies the look and feel of the web application. Cross-browser testing deals with the analysis of the web browsers that their users use, and responsive testing deals with the devices where the company’s user base visits the websites. Let us shed some light and understand cross-browser and responsive testing in detail.

What Is Cross Browser Testing?

We all know that testing cross-browser compatibility of websites « is of utmost importance. It helps understand how stable your web application is across various technologies, browsers, operating systems, and devices. The adoption of cross-browser testing is to provide a better user experience irrespective of which browser-OS-device combination your users use to access your website. In cross-browser testing, the testers generally validate the web application’s functionality and ensure its user-friendliness and performance are up to the mark across the web browsers. Businesses can also take the help of cloud-based automated cross-browser testing tools to have access to a wide range of real devices to test their web and mobile applications. Different browser engines render websites differently; even the version of each browser causes the code uniquely. It means the code behind the websites is read differently by every browser. So, various cross-browser testing strategies are critical for website accessibility. It is how different browsers render a web page:

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7 Best Browsers for Developers in 2021

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With the widespread acceptance of web standards, and the resulting deprecation of browser prefixes, there has been a noticeable change in the browser market. Where once browser manufacturers would try to lure users in with promises of feature support, now the focus is on privacy, speed, and developer tools.

When it comes to web development, you should really be testing on every browser and device you can lay your hands on; you’re probably already doing so using an app like LambdaTest, or BrowserStack.

When quality assurance testing, you probably work by market share: starting with Safari on mobile, Chrome on desktop, and working your way down to Opera and (if you’re a glutton for punishment) Yandax; naturally, when testing, it’s the largest number of users that concerns us the most.

But before you reach the QA stage, there are a number of browsers designed to assist development. Browsers that offer tools, especially for front-end developers, that assist with code and speed up development. Here are the best browsers for web development in 2021:

1. LT Browser

LT Browser is an app for web developers from LambdaTest. Like many of the apps in this class, it offers side-by-side comparisons of a site in different viewports. Additionally, LT Browser has a number of features that make it stand out.

As well as previewing web pages, LT Browser offers developer tools to rival Chrome, which is handy if you want to see how changes across different devices affect your Lighthouse scores. LT Browser also supports hot-reloading, which means when you make a change to your code, you don’t have to hit ‘refresh,’ the viewports simply reload — it’s surprising how much of a time-saver that simple addition is.

LT Browser requires a LambdaTest account, there is a free plan, and paid plans start at $15/month.

2. Firefox Developer

The best conventional browser for web development in 2021 is the developer edition of Mozilla’s Firefox.

The standard edition of Firefox is an excellent browser, packed with features, and privacy-focused. The developer edition adds to this with a suite of tools aimed at developers. The CSS and JavaScript debugging tools are superb, and the Grid tools are unparalleled for coding layouts with CSS Grid.

Firefox Developer is free to download.

3. Polypane

Polypane is one of the new generation of web browsers that are firmly intended as development aids rather than browsers. Polypane allows you to compare different viewports and platforms by placing them side by side. Interactions like scrolling are synced.

Polypane takes a step further than many browser apps in this class by showing social media previews. It even has a suite of accessibility tools, including some handy color blindness simulators.

Polypane has a 14-day free trial, and plans start at $8/month.

4. Blisk

Blisk is another browser for developers that allows you to line up a collection of viewports in a single app. URL and scrolling are synced, making testing interactions and animations effortless.

Blisk is awesome fun to play with and delivers a great preview of a responsive design. But be warned, synced viewports can be addictive, and it’s easy to line up browsers and become hypnotized by the synchronized movement; you’ll need a very large screen to get the most out of Blisk.

Blisk plans start at $9.99/month.

5. Sizzy

Sizzy is another app that allows you to view multiple viewports at once. It also has synchronized interactions, and like many competing apps, Sizzy allows you to screenshot different views.

Sizzy also includes a very clever synchronized inspect tool, so you can focus on individual elements across different viewports. It’s an excellent option for debugging, particularly if you’re digging into someone else’s code.

Sizzy has a 14-day free trial, and paid plans start at $7.15/month.

6. Brave

Brave is a privacy-focused browser that runs up to three times faster than Chrome. If you’re someone who balks at rendering speeds on most sites, Brave could be for you.

Brave’s main benefit for developers is that it supports Chrome extensions while maintaining privacy — it can even access the Web using Tor if simple privacy mode isn’t enough for you. There are hundreds of useful Chrome extensions, and if you avoid Chrome due to privacy concerns, then Brave solves your problem.

Brave is also pioneering a new system for monetizing site revenue, allowing viewers to tip sites, and soon, to control how advertising revenue is distributed.

Brave is free to download.

7. Chrome

Boring it may be, but Chrome is still the world’s most popular browser from the US to mainland China. Where once sites were “best viewed in IE,” Chrome is now the Web’s default.

No matter the site you’re designing, it has to work well in Chrome, and no simulator is as good as the real thing.

In addition to being the benchmark for page rendering, Chrome developer tools are the simplest way to access your Lighthouse scores, which helps you track down issues that may be holding you back in Google’s search results.

Chrome is free to download.

Source

The post 7 Best Browsers for Developers in 2021 first appeared on Webdesigner Depot.


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