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What Does Your User Agent Say About You?

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A user agent is a computer program representing a person, for example, a browser in a Web context.

Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web. Along with each request they make to the server, browsers include a self-identifying User-Agent HTTP header called a user agent (UA) string. This string often identifies the browser, its version number, and its host operating system.

Spam bots, download managers, and some browsers often send a fake UA string to announce themselves as a different client. This is known as user agent spoofing.

The user agent string can be accessed with JavaScript on the client side using the navigator.userAgent property.

A typical user agent string looks like this: "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0".

(Source: Mozilla.org)

User Agent String

Browser Data

User Agent Facebook

author
Danielle Fletcher
• Wednesday, 30 September, 2020
• 8 min read

We've got 11.0 million Facebook App User Agents in our database. It's easy to search the millions of user agents we've got with the API.

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(Source: bikasv.wordpress.com)

Contents

We've had to do this because otherwise we get constantly overrun by inconsiderate or malfunctioning bots which overload the system. As such, we're forced to block traffic from popular web hosting companies, VPNs and Proxies, we also rate limit requests and have some other checks too.

So use a regular expression to find the crawler name and then display your content. When you share a link to your site on Facebook, Facebook crawls it and parses it to get some data to display the thumbnail, title and some content from your page, but it would link back to your site.

Also, I think this would lead to cloaking of the site, i.e. displaying different data to user and the crawlers. Cloaking is not considered a good practice and may search engines and site take note of it.

It also blocks googles feed fetcher that also can be used for cheap Dosing. Firstly you should not use in_array as you will need to have the full user agent and not just a subset, thus will quickly break with changes (i.e. version 1.2 from Facebook will not work if you follow the current preferred answer).

It is also slower to iterate through an array rather than use a regex pattern. Also, you should not use $_SERVER; but you should filter it first Incas someone has been a little nasty things exist in there.

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(Source: jandasworld.wordpress.com)

Then, visit Facebook, and type the link to the script there, and hit space bar. You don't actually have to share anything, just typing the link in and a space will cause Facebook to fetch a preview.

Any Open Graph properties need to be listed before the first 1 MB of your website or app, or it will be cutoff. Your app or website should either generate and return a response with all required properties according to the bytes specified in the Range header of the crawler request or it should ignore the Range header altogether.

Add to your allow list either the user agent strings or the IP addresses (more secure) used by the crawler. To get a current list of IP addresses the crawler uses, run the following command.

I received a rejection email the other day from a man who had interviewed me for a job. Twitter was all abuzz when the announcement came, and lots of my friends jumped on board as soon as they could scrounge up invites.

For one thing, I have a pretty big collection of music I’ve purchase... James Dyson was not happy with his vacuum cleaner.

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(Source: acunetix.com)

The bag’s purpose was to catch the dirt, but as it filled up, it quickly compromised the suction. So he set out to create a bagless vacuum cleaner, and through much trial and error (5,271 proton...

A few months or years down the road, you can usually trace a trail of copycats and wannabes back to the original idea, but even then, sometimes it’s not mime... For a year starting in October 2004, I worked on a comprehensive redesign of the Singapore Airlines web properties, including all the web-based applications (flight booking, check-in, frequent flyer program enrollment, mileage claims, mobile flight alerts, and many more).

The iOS Human Interface Guidelines provide a robust design vernacular, so part of ... To view it please enter your password below, or contact me to request access.

Reload to refresh your session. You signed out in another tab or window. Scams cost Americans roughly $50 billion each year, and according to the Better Business Bureau, they affect one in four homes.

For Shellie Drummond, it started when she found the Facebook profile for a friend from years back, named Deborah Boyd. “I was on Messenger and my friend's name came up,” she told CBS News correspondent Anna Werner.

user
(Source: www.youtube.com)

Deborah Boyd's Facebook profile was hacked; the scam artists then targeted her friends. CBS News Soon “Boyd” was telling her about a so-called government grant she'd gotten through an agent on Facebook.

“The person that I was corresponding with that I thought was my friend had vouched for this foundation, and I believed her,” said Drummond. So she wired the $1,500 to Florida, then waited for the delivery driver (like the one shown on Facebook) to deliver her $100,000 in cash.

And when Drummond tracked down her friend by phone, Deborah Boyd told her, “It wasn't me. Turns out, Boyd's Facebook account had been hacked by scammers who locked her out, then quickly reached out to try to con her family and friends, who she then had to warn: “Please do not send them anything, and delete yourself off that page.

“They're basically capturing that trust you have in this person and using it for their own gain,” said Emma Fletcher of the Better Business Bureau. To find out, “CBS This Morning” set up our own fake account on Facebook, and contacted Boyd's imposter.

More people are falling victim to schemes by con artists who hack Facebook profiles of friends and family and try to rip you off. A quick search using Google Images turned up the truth: the photos are real, but those people don't offer grants.

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(Source: stackoverflow.com)

The company told us it has “a dedicated team … helping to detect and block these kinds of scams,” and has “developed several techniques” to stop the abuse. But Boyd told us Facebook still hasn't solved her problem, and the scammers still have a fake profile up with her name.

Over the past few years, mainstream browsers have all started including such functionality as a part of their developer console or within standard menus. Although uncommon, there is a chance for browser extensions to become hijacked for malicious purposes, which could be a risk to your security.

If you look or scroll down towards the bottom of this panel, you should see a User agent label, which includes a respective set of options. Here, you can select from a set of defined user agents or even enter your own custom user agent string.

If it’s your first time doing so, you should see a disclaimer stating that you’re entering risky territory that’s for advanced users only. If the preference isn’t there, right-click on a blank area of the page, hover New, and select the String option.

Craig is a long-time writer, coder, and marketer with years of experience in the technology and gaming spaces. Since 2008, he's worked remotely with some of the most notable publications in these industries, specializing in Windows, PC hardware and software, automation, and the like.

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(Source: www.outsideagentlink.com)

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Sources
1 faisalman.github.io - http://faisalman.github.io/ua-parser-js/
2 stackoverflow.com - https://stackoverflow.com/questions/24376418/user-agent-parsing-in-javascript
3 www.javascripting.com - https://www.javascripting.com/view/ua-parser-js
4 github.com - https://github.com/faisalman/ua-parser-js
5 github.com - https://github.com/component/user-agent-parser
6 github.com - https://github.com/3rd-Eden/useragent
7 davidwalsh.name - https://davidwalsh.name/user-agent-parser
8 github.com - https://github.com/topics/useragent
9 developers.whatismybrowser.com - https://developers.whatismybrowser.com/