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496 SSL Certificate Required An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request
Seeing security certificate errors when visiting certain websites? Learn how to remedy this issue in Internet Explorer.
A 403 status code can occur for the following reasons: [3] Insufficient permissions: The most common reason for a 403 status code is that the user lacks the necessary permissions to access the requested resource.
Alice and Bob have public key certificates issued by Carol, the certificate authority (CA). Alice wishes to perform a transaction with Bob and sends him her public key certificate. Bob, concerned that Alice's private key may have been compromised, creates an 'OCSP request' that contains Alice's certificate serial number and sends it to Carol.
This reversible status can be used to note the temporary invalidity of the certificate (e.g., if the user is unsure if the private key has been lost). If, in this example, the private key was found and nobody had access to it, the status could be reinstated, and the certificate is valid again, thus removing the certificate from future CRLs.
If the proxy server is unable to satisfy a request for a page because of a problem with the remote host (such as hostname resolution failures or refused TCP connections), this should be described as a 5xx Internal Server Error, but might deliver a 404 instead.
Bad record MAC fatal: Possibly a bad SSL implementation, or payload has been tampered with e.g. FTP firewall rule on FTPS server. 21 Decryption failed fatal: TLS only, reserved 22 Record overflow fatal: TLS only 30 Decompression failure fatal: 40 Handshake failure fatal: 41 No certificate warning/fatal: SSL 3.0 only, reserved 42 Bad certificate ...
A server uses it to deliver to the client (e.g. a web browser) a set of hashes of public keys that must appear in the certificate chain of future connections to the same domain name. For example, attackers might compromise a certificate authority, and then mis-issue certificates for a web origin. To combat this risk, the HTTPS web server serves ...