Wi fi ru

Yes, this technology uses the radio band. But the widespread notion about the harm of Wi-Fi is largely a myth. From the same cell phone (with the Internet turned off) the radiation is much stronger. Radiation from routers is not capable of causing serious changes in the human body. The exceptions may be confined spaces where there are many routers working simultaneously.

Just about complicated: how Wi-Fi works and what it is all about

Users connected to the Internet via a wireless network do not always understand what Wi-Fi is. Often an analogy is made with regular cable Internet, but only operating on radio waves in a certain range. The comparison is correct, except for a few points, as a wireless network is not the same as the Internet.

What it is: the essence of the technology

Wi-Fi is a technology for wireless data transmission within a local area network, carried out by devices based on the IEEE 802.11 standard. This is the official definition of Wi-Fi.

In simple words, "for dummies" – it is a technology of data transmission without wires, through the air, with the help of invisible radio waves. "Relatives" of wyfy – cellular, Bluetooth, radio. Before the advent of this technology, it was only possible to connect to the Internet by wire, through a cable.

By the way, the technology was invented in 1991. The first local wi-fi network connected cash registers.

1. The Internet cable is wired.
2. The cable is connected to the router, with which the local network is created. Without it, it is impossible to use wi-fi.
3. Various devices such as laptops, smartphones, televisions, etc. are connected to the router via a wireless network. This creates a local network with Internet access.

Wi-Fi is not equal to the Internet. The technology creates a local network in which different devices (laptops, printers, smartphones) can exchange data without access to the World Wide Web. By connecting to a provider (through a router, modem, access point), devices on this network get access to the Internet.

You can connect to Wi-Fi only if the network card of the device (laptop, smartphone, computer, etc.) supports wireless connection. Mobile devices and laptops have no problem with this, but computers are not always equipped with Wi-Fi support, and therefore can only connect to the local network of the router via LAN wires.

Hence the conclusion: Wi-Fi network is a local network of devices connected wirelessly to the router, which provides them with Internet access. The number of connected devices is limited by the technical parameters of the router.

How to connect to WiFi in the subway in St. Petersburg

It's easy to start using the Wi-Fi network in the subway. It is enough to follow the simple instructions and take into account a few nuances:

About what is authorization Wi-FiB why it is necessary and how to install it, if you are an entrepreneur, you can read here!

• To register for metro Wi-Fi in St. Petersburg, you can choose two options: by SMS or with the service Gosuslugi. In the first option, enter your phone number and wait for a text message. Not all operators will be able to send you an SMS in the subway car, so do it in advance. Enter the code you receive in the appropriate field. In the case of Gosuslugi, enter your login and password, and you will be connected to Wi-Fi.

Each time, before you can use Wi-Fi in the subway in St. Petersburg, you must connect to the network, go to any site in your browser and click on "Enter to the Internet. Also, each time you will need to view ads. Then the user is redirected to wi-fi.ru, and then can use the Internet.

Note that the network coverage does not extend to the platform, in contrast to the Moscow metro! That is, to use the World Wide Web will be possible only after you sit down in the car.

Register Vai Fi from a laptop

You can register in the subway Wi-Fi Saint-Petersburg system in advance by entering the MAC-address of your telephone. This can save time and be a good preparation for your trip, especially if you are from another city. This method registers you in the system, the same for Moscow and St. Petersburg metro.

login.wi-fi.ru/am/UI/Login?client_mac=00:00:00:00:00&org=mac&ForceAuth=true

Where can I connect?

Unfortunately, civilization has not yet reached all areas of the city, so you can get free access to the Internet at not all stations. The list includes 18 stops:

1. Avtovo;
2. Akademicheskaya;
3. Baltiyskaya;
4. Gorkovskaya;
5. Kirovsky Plant;
6. Komendantsky Ave;
7. Leninsky Ave;
8. Lesnaya;
9. Lomonosovskaya;
10. Narvskaya;
11. Prosveshchenie Pr;
12. Ploshchad Muzhestva;
13. Primorskaya;
14. Pushkinskaya;
15. Staraya Derevnaya;
16. Udelnaya;
17. Ulitsa Dybenko;
18. Chkalovskaya.

How to remove ads when entering the subway network

Advertising is the main article of earnings of the company, which has installed a Wi-Fi network in the subway. Thanks to it, the system will reach self-sufficiency by 2023. However, with constant connectivity in subway cars, one or two intrusive commercials start to get in the way and become annoying. There are several ways to perform ad-free entry on subway WiFi.

• Buy a subscription through your personal WiFi-free metro account in the "MT_FREE WiFi network" application. With the help of the program you can configure the operation of the connection, automate it, disable advertising. For the latter, the "Like Home" subscription format is used. The first payment is usually a promotional one, but once you pay once, you will be connected to auto-pay. If you do not want to pay for the Internet every month, this service should be deactivated.

• The second option: when an advertising banner appears on the screen, you should not press the "Login to the Internet" button. But you have to click on it. The Internet will start working and the advertiser's site will open. This page can be closed immediately and you can continue to access the network.

• Finally, there are programs and browsers that block ads. In the case of this situation, this is an illegal method. According to the public offer, the customer must view the ads before using Wi-Fi in the subway for free.

How to disable regular charges

To access Wi-Fi in the subway, each customer has a personal account, but you should not go to the subway website mosmetro, but to a separate site WiFi in the subway: "wi-fi.ru" . It is here that you can see your connected devices, as well as disable regular payments.

1. It is necessary to find "Subscriptions". , the name of the service – "As at home" and "Disconnect" . The paid period will end normally, and after it the service will be deactivated.
2. Another way is through the application. Provider Maxima Telecom, which created WiFi in the subway, has equipped a personal account in the application with a user-friendly interface and understandable settings. It can be installed on iPhone and Android. You can delete the subscription through "My Devices" .

And, actually, how to find out the number of a beauty

I'm pretty sure you've all guessed how our scenario will go.

Eva really wants to find out Alice's phone number at the table across the table (forbidden love!). Like most people in Moscow, using the phone, Alice also uses the MT_FREE network.

Eva follows Alice for a while, and finds out her MAC using the utility airodump-ng, widely available and running on almost any waffle machine. Once she recognizes it, she follows the subway, changes her MAC to Alice's, opens the auth.wi-fi.ru page, and gets the number she wants.

I'm too lazy to even check it out.

But wait, potential Eve! To simplify the labor of going through dozens of poppies from the diner in search of a phone for your painstaking wi-fi security research, I made a little script! You can find it at the bottom of the article.

So far it only works for the subway, since I haven't been able to get the server to believe that my mac is not 00:00:00:00:00. Previously, it was possible to pass the mac in the client_mac parameter, but I haven't found an analogue yet.

And now we're developing again.

Wireless technology has continued to evolve. So, in 2015, a new revision appeared – WiF 802.11 AC, where the number of MIMO streams was brought up to 8. Thanks to this, as well as other technical tricks, it was possible to achieve bandwidth per channel up to 866 Mbit/sec. However, there were some difficulties in achieving the theoretical maximum, because in a narrow band of 2.4 GHz is quite difficult to achieve the ideal reception due to the congestion of the "ether".

Bandwidths as high as 7 Gbit/s are extremely rare to achieve. But still the speed is huge compared to previous generations. MIMO was perfected, so there was MU-MIMO, channel multiplexing technology. The access points became smart, they were taught to split one channel into several sub-channels, each of which exchanges data with subscribers. This made it possible to optimize the operation of access points even in very high-loaded networks.

This was also achieved by phase-shifting the signal so that the interference became "constructive", so that the radio waves were amplified by the interaction.

New advances

Recently there has been a new standard, 802.11 AX, also called Wi-Fi 6. Several advancements have been made including the addition of new OFDMA technology. This technology allows you to increase the performance of a single channel with a 40 MHz spectrum width to 290 Mbps. MU-MIMO scheme has been improved, now there is a two-way full-fledged data exchange mode.

In particular, the developers introduced quadrature amplitude modulation (QAM) 1024, which allowed increasing the modulation density and increasing data transfer rate by about a third.

802.11ax allows you to work in environments with a high density of clients, transmitting over the air heavy media content – for example, video with a resolution of 4-8K. The number of access points in the vicinity of each other has almost no effect on the quality of data reception and transmission. The advantage of the new generation connection is also that it is quite energy-efficient, so the batteries of mobile devices last longer.

What a paid subscription to Wi-Fi in the subway brings

Advertisers help the Internet service provider distribute the connection to passengers for free. For this, users need to view the ad unit before connecting to the Wi-Fi. You can turn off advertising by paying a subscription to the service "As at home. It allows you to use the network as soon as a person enters the car. No need to open the browser, "login". This is especially convenient if the network is unstable and you have to sign in several times during the trip.You can turn off advertising by paying a subscription to the service "As at home. It allows you to use the network as soon as a person enters the car. No need to open the browser, "login". This is especially convenient if the network is unstable and you have to sign in several times during the trip. If necessary, you can disable the subscription to wi fi network in the subway.

A paid subscription in the Moscow subway costs 129 rubles per month. The money is automatically deducted from the subscriber's account at the end of the usage period. It is also possible to connect a package for 3, 6 or 12 months. For three months the cost of the service will be 447 rubles, for six months – 777 rubles, and for a year – 1177 rubles. There is only one monthly tariff for 129 rubles in the St. Petersburg Metro.

Important! When subscribing for 3, 6 or 12 months, you should know that it will be a one-time payment. The subscription will not be automatically renewed. In general, the monthly fee is charged monthly.

There is a flat rate for the capital, valid for surface and underground transport. The monthly cost is 277 rubles. Three months without advertising – 990 rubles, six months – 1690 rubles, a year – 2250 rubles.

Prices for tariffs may increase. In this case the Maxima Telecom service provider sends out messages to users warning them about the increase in the cost of services.

Payment is made in two ways: by debiting the account or using a bank card. How to disable auto-payment in the subway for wifi, depends on the payment method.

Quality of Wi-Fi in the subway

According to the developers' assurances, the stability and quality of the Network are at a high level. But users have noticed that the quality of wifi connection has begun to drop compared to when the Network was first launched in the subway.

This could be due to the fact that a large number of people are using free Internet access every day. The load increases, the bandwidth drops and, consequently, the connection speed and stability.

Observations are confirmed experimentally. For example, it takes about 1 thousand milliseconds for the network to send a packet of data. Under normal conditions, this does not exceed 500 milliseconds.

Applications that make it easier to use WI-FI on the subway, in your smartphone or tablet

Software that makes it easier to use the subway's wireless connection was mentioned above. As a reminder:

The use of wireless communication cannot be secure because it is a public network. To avoid network attacks, it is worth following some simple guidelines:

1. Disable the sharing option on the user's mobile device. It can be found in the system settings tab.
2. Use VPN services. They allow you to create a virtual secure network, which will protect the user from intruders.
3. It is strictly not recommended to access personal accounts or social networks from a smartphone when public Wi-Fi is connected.
4. On all services that the client actively uses, you must allow two-factor identification. Any operation must be confirmed by an SMS code. This will increase the processing time of the requests, but will increase the level of security.
5. It is obligatory to install Internet Security level antivirus on your mobile device.
6. Despite the convenience of auto-connection programs to public networks, you should use them with caution. Fraudsters can intentionally create fake Wi-FI connections.

Conclusion

The publication tells about wireless Internet in the Moscow subway. The variants of registration and ways to connect to Wi-Fi are considered. Tips on how to create an automatic connection to Moscow Metro wi-fi are given as well as recommendations on how to improve the security of the connection.

Podgornov Ilya Vladimirovich All articles on our site are audited by a technical consultant. If you still have questions you can always ask them on his page.

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