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  2. List of FTP server return codes - Wikipedia

    en.wikipedia.org/wiki/List_of_FTP_server_return...

    Request denied for policy reasons. 535: Failed security check. 536: Data protection level not supported by security mechanism. 537: Command protection level not supported by security mechanism. 550: Requested action not taken. File unavailable (e.g., file not found, no access). 551: Requested action aborted. Page type unknown. 552: Requested ...

  3. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The request was well-formed (i.e., syntactically correct) but could not be processed. [1]: §15.5.21 423 Locked (WebDAV; RFC 4918) The resource that is being accessed is locked. [7] 424 Failed Dependency (WebDAV; RFC 4918) The request failed because it depended on another request and that request failed (e.g., a PROPPATCH). [7]

  4. Fortinet - Wikipedia

    en.wikipedia.org/wiki/Fortinet

    Initially, FortiGate was a physical, rack-mounted product but later became available as a virtual appliance that could run on virtualization platforms such as VMware vSphere. In May 2004, Trend Micro , a competing cyber security and defense company, filed a legal complaint against Fortinet.

  5. Digest access authentication - Wikipedia

    en.wikipedia.org/wiki/Digest_access_authentication

    Digest access authentication is one of the agreed-upon methods a web server can use to negotiate credentials, such as username or password, with a user's web browser.This can be used to confirm the identity of a user before sending sensitive information, such as online banking transaction history.

  6. SMTP Authentication - Wikipedia

    en.wikipedia.org/wiki/SMTP_Authentication

    SMTP Authentication, often abbreviated SMTP AUTH, is an extension of the Simple Mail Transfer Protocol (SMTP) whereby a client may log in using any authentication mechanism supported by the server. It is mainly used by submission servers, where authentication is mandatory.

  7. Transport Layer Security - Wikipedia

    en.wikipedia.org/wiki/Transport_Layer_Security

    Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network, such as the Internet.The protocol is widely used in applications such as email, instant messaging, and voice over IP, but its use in securing HTTPS remains the most publicly visible.

  8. Time-based one-time password - Wikipedia

    en.wikipedia.org/wiki/Time-based_One-Time_Password

    TOTP credentials are also based on a shared secret known to both the client and the server, creating multiple locations from which a secret can be stolen. An attacker with access to this shared secret could generate new, valid TOTP codes at will. This can be a particular problem if the attacker breaches a large authentication database. [4]

  9. Open Shortest Path First - Wikipedia

    en.wikipedia.org/wiki/Open_Shortest_Path_First

    Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS).