Is a line of code that tells websites what type of browser and operating system you"re using. This information helps the web server deliver content that"s compatible with your browser.

User agent issues

You can change Firefox"s user agent to trick websites into thinking that you"re using a different browser or operating system. Web developers might do this to see how their websites will appear on different systems and browsers. Sometimes, add-ons and other installations can change your user agent without your knowledge.

Websites may not display correctly or may show a message that your browser is outdated or incompatible, based on the detected user agent. It"s important to switch Firefox back to the default user agent so that websites work properly.

View your user agent

To view your user agent, click the Firefox menu button, click Help and select Troubleshooting Information. This will open a page with the address about:support. The Application Basics section will include a User Agent entry. For example, the default user agent entry for Firefox 72 on Windows 10 (64-bit) would appear as:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0

Note: If your user agent shows a previous Windows version, such as Windows NT 6.1 (Windows 7) instead of Windows NT 10.0 (Windows 10), make sure you are not running Firefox in Compatibility mode. You can open the Properties of the Firefox desktop shortcut from the right-click context menu. Check the "Compatibility" tab and make sure that the compatibility mode option is not selected.

Reset the default Firefox user agent

To reset your user agent:

Type about:config in the address bar and press EnterReturn.
A warning page may appear. Click I accept the risk!Accept the Risk and Continue to continue to the about:config page.
Search for useragent by typing it into the Search field.
Right-click Hold down the control key while you click on each of these preferences, if they exist, and select Reset from the context menu.

general.useragent.extra.firefox
general.useragent.extra. productName - where productName can be the name of some third party software (e.g. microsoftdotnet).
general.useragent.locale
general.useragent.override
general.useragent.security

See Configuration Editor for Firefox for more information about using the about:config page to reset or delete preferences.

SQLMap— this utility works on most platforms and is written in Python. Its purpose is to carry out sql injections. Some of its capabilities:
* Determining the "system banner" (server, script interpreter, database) * Displaying the user name under which the attacked farm operates * Displaying databases, tables, columns and fields

#Description Everyone has heard about WPS and its famous hole, so I'll start from the middle.
In the WPS protocol there is a pin consisting of 8 digits. Reaver implements a brute force attack on this PIN code. If the pin is selected successfully, Reaver restores the WEP/WPA key.
On average, the work of reaver is 10 hours, but in a minority of cases, it is possible to get the key to your Wi-Fi in 3 hours.
#Installation
If you haven’t decided to download Kali Linux, then your Ubuntu most likely doesn’t have it. So, first of all, let’s download the required version for free without registration and SMS. After unpacking the archive, we build: $ ./configure$ make# make install And if you want to remove it, then: #

Nmap is a utility for various scanning of IP networks, has the ability to determine the OS of a remote host, “invisible” scanning, parallel scanning and much more. Now available for any OS. Scans using various methods: UDPTCP (connect) TCP SYN (half-open) FTP-proxy (breakthrough through ftp) Reverse-ident ICMP (ping) FINACK Xmas tree SYN and NULL scanning.

So a note is not an article.
The topic raises many questions. One of the solutions.
Answer to the question in the profile topic on the chat.
I decided to post it here and it will probably be interesting to someone here.
================================================
Python is installed in most cases
We log in via SSH to the VPS.

# wget https://thesprawl.org/media/projects/dnschef-0.3.zip

# unzip dnschef-0.3.zip

# chmod 755 *.py

Installing modules

# pip install dnslib

# pip install IPy

create a hosts.txt file

Huyandex.ru=IP_TVOYE_VPS

Let's launch. first make sure that port 53 is not busy and Apache with a fake is running

./dnschef.py -i 0.0.0.0 --logfile=log.txt --file=hosts.txt

Your DNS is working. Returns addresses, but only returns to huyandex.ru request

IP_TWOY_VPS

Or like this:

./dnschef.py -i 0.0.0.0 --logfile=log.txt --fakeip=IP_TOUR_VPS

This is how your ip is returned in response to ANY request.

If you need to leave the script running and exit the vps, then run it through screen or nohup.

Can be prescribed DNS address in (! YOUR!) router. Second...

User Agent (Russian: User Agent) is an information string that identifies a particular browser. With its help, a number of data about the client being used are transmitted in order to correctly process and correctly display the target web page for the user.

Why you may need to change User-Agent

Website developers and administrators can evaluate whether their website is sufficiently optimized for different browsers and devices;
In cases where it is necessary to “trick” a particular site in order to gain access to content intended for another platform or device (since, depending on the “user agent”, the same Internet page may offer different content);
In general, User-Agent allows you to determine quite a few different parameters: the name of the Internet browser and its version, the rendering engine, the operating system and its bit depth, interface language, screen resolution, device type, IP, and much more. Therefore, replacing the User Agent can also be considered as one of the measures to ensure user confidentiality on the Internet.

How to change User Agent in Google Chrome and Yandex Browser

Replace User-Agent in Google Chrome, Yandex Browser, Opera and other Chromium browsers, you can either directly use the settings of the web browser itself or through extensions.

Method 1: Settings

The disadvantage of this method is that the User Agent will only change for the current page, i.e. For each new one, the above procedure will need to be repeated.

Method 2. Special extensions

You can also change the user agent using browser add-ons, such as User-Agent Switcher. It simplifies this process as much as possible.

All you need for this:

At the same time, the user agent you select will be used on all sites that you visit (until the work is completed). However, you can check the box next to “Remember last used User-Agent at startup”,

then work will be resumed with the same User-Agent that you specified during the previous session.

If you want to use User Agent substitution as one of the means of protecting your own privacy on the Internet, then pay attention to
Random User-Agent.

Random User-Agent is capable of not only changing the User Agent, but can do this automatically after a given period of time, hides the real User-Agent even when detected using Javascript, and has a lot of other useful options.

In this short note I will show you a simple way to change the User Agent in Mozilla browser. What is this User Agent? This is a browser identifier record that is sent in each data packet when browsing the Internet. That is, each browser has its own User Agent. The entry is written in the HTTP header, however, some more information can be found there, but that’s another story.

This parameter is needed primarily for sites so that they better understand which browser is being used (this is necessary for the site to display correctly on all browsers, both outdated and modern). That is, if you have Mozilla, and you install User Agent from Internet Explorer, then the sites will think that you are using it and not Mozilla.

You can change User Agent in Mozilla using standard methods, using the settings page, you can get to it if you write this in the address: about:config:

There will be a field at the top where you need to enter the word useragent and see if there is such a parameter:

As you can see, I have this parameter, but you most likely will not. Therefore, if anything happens, create a string parameter named general.useragent.override. Just make sure that the parameter is a string! Then, inside this parameter you can specify a special string (double-click on the parameter), which will identify your browser. For example, if you specify this line:

Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)

then the server or sites will see you as Internet Explorer 9, you don’t need to restart the browser, everything will work right away. Almost all user agents can be found on the Internet, in any browser - just copy the line, paste it this way, click OK and that's it - they see you under a different browser

There is also an add-on, you can download it, it’s called User Agent Switcher, but I really can’t understand why it didn’t work for me (but it did install). After installing the add-on, a menu with ready-made browser agents should appear in the browser, this is probably really convenient and you can quickly change them... but there are very few of them there - only a couple of versions of Internet Explorer and a third iPhone, and that’s all. As I understand it, this extension simply makes it possible to create such a menu yourself, because if you look in its settings, you will notice the option to add your own user agents, here it is:

In general, I think that this is a bug on my side, but you can install it, after all, many users have already installed it and there seem to be no problems. I completely forgot, here is the official link from where you can download it.

15.02.2016

If for any reason you need to change the User Agent in your browser, then this article is for you.

So, User Agent is a browser string (application) that serves to identify various parameters - browser name, browser bitness, browser version, version operating system and other parameters.

The term is commonly used in networking and Internet technologies for applications that access websites. User Agent is used by browsers, search robots (Yandex, Google and others), as well as various “spiders”, Cell phones and other devices.

A typical situation at work - the system administrator has blocked access to all browsers except Internet Explorer, but you want to use Chrome or Opera, what should you do in this case? Let's deceive system administrator. The secret to bypassing the blocking is to change the user agent of the browser.

Method 1.

This method works in most browsers. Let's write the following parameter in the browser shortcut:

User-agent

Let's force Opera to impersonate Internet Explorer 9, right-click on the shortcut - "Property" - "Object" and add the line:

User-agent="Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"

That is, the full path should look something like this:

"C:Program Files (x86)Operalauncher.exe" --user-agent="Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"

Now all that remains is to click "OK".

Method 2: Mozilla Firefox

Open your browser and type the following in the address bar:

About:config

Click on the “I promise I’ll be careful!” button:

General.useragent.override

And in the value we enter the user agent of any browser, for example ie 9:

Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)

Ready. Now we are masquerading as IE.

Method 3. Extensions

Modern browsers can use various extensions. We look in browsers for something like: “Download extensions” and look for extensions such as “User-Agent Switcher”, “Custom UserAgent String” and others.