![]() ![]() This standards-based security protocol is also widely used with IPv4 and the Layer 2 Tunneling Protocol. Internet Protocol Security ( IPsec) was initially developed by the Internet Engineering Task Force (IETF) for IPv6, and was required in all standards-compliant implementations of IPv6 before RFC 6434 made it only a recommendation. ![]() Secure VPN protocols include the following: The life cycle phases of an IPSec Tunnel in a virtual private network message integrity to detect and reject any instances of tampering with transmitted messages.sender authentication to prevent unauthorized users from accessing the VPN.confidentiality such that even if the network traffic is sniffed at the packet level (see network sniffer or deep packet inspection), an attacker would see only encrypted data, not the raw data. ![]() To prevent disclosure of private information or data sniffing, VPNs typically allow only authenticated remote access using tunneling protocols and secure encryption techniques. VPNs cannot make online connections completely anonymous, but they can increase privacy and security.
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