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 war broke out, and with the help of Lin Xuan, the octopus was suppressed.Hearing this, Xiao Xiyu s eyes lit up. If she gets it, even if she leaves the family, those members of the Qing Clan will not dare to touch her anymore, and it is even more impossible for her to get married, so she must be in the top ten.
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This black jar is extremely mysterious. Perhaps, it is the chance that Hei Shan said, He also paid a huge price to get it, but it is not easy for him to leave the black jar, he feels that his current strength is not enough.A few voices came, and the faces of the people in Youyunmen changed.
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He roared furiously, his palms were stamped, endless blood appeared on his body, and he turned into thousands of clones, killing Lin Xuan.But at this time, a few old men beside him laughed and said, what, do you want to take care of our Vulcan Palace Stay with me to the end.
The other elders also shook their heads and sighed, even Elder Yan Luo frowned, really, is there no hope To be sitting in white Netizens please remind Please pay attention to rest your eyes when reading for a long time.After finishing speaking, Lin Xuan stood there silently, the elders eyes flickered, and they began to discuss, they finally nodded, okay, let s do this, spread the news, let them all come Damn it, Mr.
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This battle was really too intense. Another sword knocked the opponent back, Lin Xuan said coldly, is the law of the stars Your stars are too small, let me tell you what is the real vastness of the galaxy Lin Xuan s Wushuang sword has countless star lights, and it rotates quickly.It stopped on the huge island of the gods, where the power of heaven and earth is very strong, it is obviously a treasure land for cultivation, and there are many young geniuses coming and going.
Colliding with the opponent s palm, suddenly, the surrounding mountains shook violently, and countless formations flickered indefinitely.The old woman in Ice Feather Hall nodded, and then made a seal with her palm, and a note was passed in.
Lin Xuan was stunned after hearing this, did the news get out Six Dao Sect, presumably it should be the sect where the pinnacle great sage is.No wonder, their people fell before, and there is such a master, so they have to go back quickly and tell the sect that this kid is not dead, and he has become extremely scary.
It can be said that they belonged to the first echelon.And even with the Void Mirror, they couldn t walk in front of the ancient bronze coffin, because they tried before, and a powerful force stopped them.
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With a click, one of his arms was actually broken. Roar The black fire demon ape was completely angry and fell into madness.Next, the two began to train together, and Xiao Xiyu had already planned to let Lin Xuan be her helper, to participate in the next mountain and sea beast fight together.
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Boy, you actually help the evildoers and help the heavenly court to turn on the sky lanterns.In the end, it was still suppressed by the emperor, but even so, can you imagine what kind of existence it is so smart Lin Xuan was surprised.
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The young lord of the Dragon Clan and the elders of the Mountain and Sea Palace were shocked.He used the black jar to fight against it. The monster at the peak of the holy king was no match at all.
Find a safe place to rest. I want to take a look at the Peerless Excalibur over there.This is a gorgeous dividing line If it weren t for Falcon as an insider, Lin Xuan would never have been able to find the other party.
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The entire Tianwu Continent will surrender under my feet.The next moment, where he was standing, a ferocious fire dragon appeared, directly piercing through the void.
Impossible, how is it possible that he is just a young boy from a barren land, how could he have so many means Mr.Hearing this, Lin Xuan nodded I can stop, but what I said before must take effect.
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Lin Xuan, who was originally ranked third, suddenly shone like the sun, and rose rapidly, and finally jumped to the first position.That building can be named Cangsong, and it can be said to be the most important thing in the entire Cangsong Hall.
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The most famous ones are the battle between Yandi and Huangdi at Banquan, the battle between Chiyou and Huangdi at Zhuolu, and the battle between Gonggong and Xuandi Zhuanxu.Many people asked about Zuan s relevant information.
Their enthusiasm soon overwhelmed Zu an, but fortunately Nan Xun came out in time and scolded those women, and then reluctantly protected him and returned to his small courtyard.He is not a cold blooded person, so there is no way he can do it.
It can be seen that this Zheng Dan has an absolutely unusual relationship with him, even the eldest son of the Sang family The lady looked at him with affectionate eyes.After she finished speaking, she suddenly thought that she had left the capital alone, but she met him again when she was in danger.
Zu an heard of it before, but as a traveler, he doesn t have the mysterious admiration for Purple Mountain that the natives of this world have.
Cependant, il est utile de savoir comment fonctionne un VPN pour mieux comprendre le service. Voici ce qui se passe en coulisses :
