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  2. Fix security certificate error messages in Internet Explorer

    help.aol.com/articles/message-the-security...

    While Internet Explorer may still work with some AOL products and services, it's no longer supported by Microsoft and can't be updated. Because of this, we recommend you download a supported browser for a more reliable and secure experience online.

  3. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The client must first authenticate itself with the proxy. 408 Request Timeout The server timed out waiting for the request. According to HTTP specifications: "The client did not produce a request within the time that the server was prepared to wait. The client MAY repeat the request without modifications at any later time." 409 Conflict

  4. Server Name Indication - Wikipedia

    en.wikipedia.org/wiki/Server_Name_Indication

    In more detail, when making a TLS connection, the client requests a digital certificate from the web server. Once the server sends the certificate, the client examines it and compares the name it was trying to connect to with the name(s) included in the certificate. If a match occurs, the connection proceeds as normal.

  5. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    404.0 – Not found. 404.1 – Site Not Found. 404.2 – ISAPI or CGI restriction. 404.3 – MIME type restriction. 404.4 – No handler configured. 404.5 – Denied by request filtering configuration. 404.6 – Verb denied. 404.7 – File extension denied. 404.8 – Hidden namespace. 404.9 – File attribute hidden. 404.10 – Request header ...

  6. Online Certificate Status Protocol - Wikipedia

    en.wikipedia.org/wiki/Online_Certificate_Status...

    The OCSP responder uses the certificate serial number to look up the revocation status of Alice's certificate. The OCSP responder looks in a CA database that Carol maintains. In this scenario, Carol's CA database is the only trusted location where a compromise to Alice's certificate would be recorded.

  7. HTTP 403 - Wikipedia

    en.wikipedia.org/wiki/HTTP_403

    If the user does not provide valid credentials or if the authentication fails, a 403 status code is returned. IP restrictions: The server may also restrict access to specific IP addresses or IP ranges. If the user's IP address is not included in the list of permitted addresses, a 403 status code is returned.

  8. Client certificate - Wikipedia

    en.wikipedia.org/wiki/Client_certificate

    In cryptography, a client certificate is a type of digital certificate that is used by client systems to make authenticated requests to a remote server. [1] Client certificates play a key role in many mutual authentication designs, providing strong assurances of a requester's identity.

  9. Transport Layer Security - Wikipedia

    en.wikipedia.org/wiki/Transport_Layer_Security

    e.g. certificate has only server authentication usage enabled and is presented as a client certificate 44 Certificate revoked warning/fatal: 45 Certificate expired warning/fatal: Check server certificate expire also check no certificate in the chain presented has expired 46 Certificate unknown warning/fatal: 47 Illegal parameter fatal: 48