VPN est l’abréviation de « virtual private network » (réseau privé virtuel) et désigne un service qui protège votre connexion Internet et votre confidentialité en ligne. Il crée un tunnel chiffré pour vos données, protège votre identité en ligne en masquant votre adresse IP et vous permet d’utiliser les points d’accès Wi-Fi publics en toute sécurité.
Pourquoi avez-vous besoin d’un VPN ?
Personne n’aime être surveillé ou suivi, même s’il n’a rien à cacher. C’est pourquoi il est important de renforcer vos défenses en matière de confidentialité. Lorsque vous naviguez via un VPN, votre activité sur Internet est chiffrée de sorte que personne ne peut voir ce que vous faites en ligne. Voici d’autres raisons pour lesquelles vous avez besoin d’un VPN :
En général, lorsque vous essayez d’accéder à un site Web, votre FAI (fournisseur d’accès à Internet) reçoit la demande et vous redirige vers votre destination. Tandis que lorsque vous vous connectez à un VPN, il redirige d’abord votre activité Internet à travers un serveur VPN, avant de l’envoyer à votre destination. Voici ce qui se passe lorsque vous vous connectez à un VPN :
Le VPN change votre adresse IP et masque votre emplacement
Les personnes travaillant dans des pays où la liberté d’expression est limitée dépendent d’une connexion Internet privée pour leur travail. Leur vie peut même parfois en dépendre. Les personnes qui vivent sous un régime autoritaire devraient utiliser un VPN pour masquer leur adresse IP et garantir une sécurité supplémentaire pour leurs messages sensibles.
Fonctionnement d’un VPN
Il existe de nombreux types de VPN différents, mais nous allons nous concentrer ici sur le VPN grand public, celui que NordVPN offre. Lorsque vous téléchargez un logiciel VPN basé sur le client sur votre appareil, il effectue la majeure partie du travail à votre place : il vous suffit de vous identifier et de vous connecter.Cependant, il est utile de savoir comment fonctionne un VPN pour mieux comprendre le service. Voici ce qui se passe en coulisses :
Lorsque vous vous connectez à un service de réseau privé virtuel, celui-ci authentifie votre client auprès d’un serveur VPN.
Le serveur applique ensuite un protocole de chiffrement à toutes les données que vous envoyez et recevez.
Le service VPN crée un « tunnel » chiffré sur Internet. Cela sécurise les données qui circulent entre vous et votre destination.
Pour garantir la sécurité de chaque paquet de données, un VPN l’enveloppe dans un paquet externe, qui est ensuite chiffré par encapsulation. C’est l’élément central du tunnel VPN, qui assure la sécurité des données pendant leur transfert.
Lorsque les données parviennent au serveur, le paquet externe est supprimé via un processus de déchiffrement.
Comment fonctionne le tunneling VPN ?
Le tunnel VPN est créé en authentifiant d’abord votre client (un ordinateur, un smartphone ou une tablette) auprès d’un serveur VPN. Le serveur utilise ensuite l’un des nombreux protocoles de chiffrement pour s’assurer que personne ne puisse surveiller les informations qui circulent entre vous et votre destination en ligne.
N’oubliez pas qu’avant d’être envoyées et reçues sur Internet, les données doivent d’abord être divisées en paquets. Pour garantir que chaque paquet de données reste sécurisé, un service VPN l’enveloppe dans un paquet extérieur, qui est ensuite chiffré par un processus appelé encapsulation.
Ce paquet extérieur maintient la sécurité des données pendant le transfert, et il constitue l’élément central du tunnel VPN. Lorsque les données arrivent sur le serveur VPN, le paquet extérieur est retiré pour accéder aux données qu’il contient, ce qui nécessite un processus de déchiffrement.
Comment fonctionnent les serveurs VPN ?
Une fois le tunnel VPN établi, votre appareil envoie des informations chiffrées (comme le site Web que vous voulez visiter) au serveur VPN. Celui-ci les déchiffre et transmet les informations au serveur Web désigné. Il masque également votre véritable adresse IP avant d’envoyer les données. Au lieu de cela, vous utiliserez l’adresse IP du serveur VPN auquel vous êtes connecté(e).
Lorsque le serveur Web répond, le serveur VPN chiffre les données et vous les envoie par le biais de votre FAI. Votre client VPN déchiffre les données lorsqu’elles atteignent votre appareil.
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The purple lightning swordsmanship extinguished the purple thunder and lightning all over the sky for me, forming a series of terrifying purple sword shadows, slashing forward.Lin Xuan also narrowed his eyes and walked forward.
At this moment, the Golden Lion King snorted coldly.I admit that your ice is powerful, but under my blazing sparks, it is impossible for you to have any power to fight back.
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Lin Xuan nodded, and then looked at those people in the surrounding cave.While everyone was talking about the coronation ceremony, they were also nervously preparing for it.
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A ray of light flew over, and Guangming said Mr. Lin, I want to invite you to the Guangzu.The feeling has reached an extreme, he is going to go out for a stroll, digest it, let Xiao Mu sit in charge, he and Gu Yue left, accompanied by four young geniuses from the Baiyun Cave, they are extremely respectful and respectful to Lin Xuan.
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There was an extremely terrifying rune in his eyes.Lin, know We can t be ungrateful, brother taught us, we know, The people around also nodded quickly, Huo Yuan looked into the distance and said, hoping he is okay.
I didn t expect that there would be a chance to make a comeback so soon.However, Wang Xuexin still felt that Zhu Zhenjiang didn t withdraw just because he said it.
After that, the recalcitrant air force cast a huge psychological shadow, so that they dare not fight again.But this time it s more just local guerrillas doing it.
They all surrounded him and shouted enviously Commander, what kind of gun is this It s different from ours Yes, this You don t even need to pull the bolt, this gun is good Get us one sometime At this time, Xie Baoqing, who knew the inside story, came up Go and go, everyone is eating from the bowl and looking at the pot.
It is not too much to gather a special agent team from a division or a brigade, right Now Li Yunlong is required to gather a special agent team from an independent group of more than 800 people
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Zhao Gang said Oh and said, You come to analyze and analyze Wang Xuexin got up and said, Political commissar, I don t think the recalcitrant army will send troops to surround the devils with our army.
In addition, Zhongtiao Mountain is a strategic location for the stubborn army.He believes that no matter how dangerous the task is, he should obey unconditionally, and always put the safety of the chief and the headquarters first, even if he sacrifices himself.
Under such circumstances, the devils would not detonate the warehouse and self destruct as soon as they came up.The wailing like a beast is almost not a sound that humans can make.
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If the surface is covered with a layer of canvas and camouflage, even enemy infantry will not be able to find the tank in front of them.The point at which warplanes are available. Davis took out a document from his briefcase and handed it to Wang Xuexin, saying This is my feasibility study on adding a chassis to the Bofors anti aircraft gun.
So Zhang Wan and his group set En Keto Blast Gummies Reviews Xh 6tgr off after preparing, but the chief and others couldn t make it because they still had to direct the battle.We have no more than 30,000 troops at best, and it is difficult to defend Zhongtiao Mountain, so attack Although Guan Dashan didn t get to the point, the cadres could understand.
A row of three classes. A company adds a light firepower platoon to the three infantry platoons.This put Staff Ye in a difficult situation. This Staff Officer Ye really didn t do a good job in intelligence work, he was just an officer who had studied at Mao Xiong s and acted as an interpreter for Mao Xiong s advisory group.
Cependant, il est utile de savoir comment fonctionne un VPN pour mieux comprendre le service. Voici ce qui se passe en coulisses :
