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  2. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    450 Blocked by Windows Parental Controls (Microsoft) The Microsoft extension code indicated when Windows Parental Controls are turned on and are blocking access to the requested webpage. [36] 498 Invalid Token (Esri) Returned by ArcGIS for Server. Code 498 indicates an expired or otherwise invalid token. [37] 499 Token Required (Esri)

  3. OpenVPN - Wikipedia

    en.wikipedia.org/wiki/OpenVPN

    OpenVPN has several ways to authenticate peers with each other. OpenVPN offers pre-shared keys, certificate-based, and username/password-based authentication.Preshared secret key is the easiest, and certificate-based is the most robust and feature-rich.

  4. OpenConnect - Wikipedia

    en.wikipedia.org/wiki/OpenConnect

    OpenConnect is a free and open-source cross-platform multi-protocol virtual private network (VPN) client software which implement secure point-to-point connections. The OpenConnect client supports the following VPN protocols: Cisco AnyConnect; Juniper Secure Connect (since 7.05) [3] Palo Alto Networks GlobalProtect (since 8.00) [4]

  5. Virtual private network - Wikipedia

    en.wikipedia.org/wiki/Virtual_private_network

    Virtual private network (VPN) is a network architecture for virtually extending a private network (i.e. any computer network which is not the public Internet) across one or multiple other networks which are either untrusted (as they are not controlled by the entity aiming to implement the VPN) or need to be isolated (thus making the lower network invisible or not directly usable).

  6. VPN blocking - Wikipedia

    en.wikipedia.org/wiki/VPN_blocking

    VPN blocking is a technique used to block the encrypted protocol tunneling communications methods used by virtual private network (VPN) systems. Often used by large organizations such as national governments or corporations, it can act as a tool for computer security or Internet censorship by preventing the use of VPNs to bypass network ...

  7. WireGuard - Wikipedia

    en.wikipedia.org/wiki/WireGuard

    WireGuard is a communication protocol and free and open-source software that implements encrypted virtual private networks (VPNs). [5] It aims to be lighter and better performing than IPsec and OpenVPN, two common tunneling protocols. [6]

  8. List of SMTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SMTP_server_return...

    This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. Unless otherwise stated, all status codes described here is part of the current SMTP standard, RFC 5321. The message phrases shown are typical, but any human-readable alternative ...

  9. Blue screen of death - Wikipedia

    en.wikipedia.org/wiki/Blue_screen_of_death

    Preview builds of Windows 10, Windows 11, and Windows Server (available from the Windows Insider program) feature a dark green background instead of a blue one. [26] [27] [24] Windows 3.1, 95, and 98 supports customizing the color of the screen [28] whereas the color is hard-coded in the Windows NT family. [28]