share * Business focus * What services are available at the bottom line, the CA you choose should provide at least the CRL (Certificate List) and OCSP (Online Certificate Status Protocol) recall mechanism as well as for OCS The performance of the P service. At a minimum, the CA provides domain name validation and extended certificate validation, ideally allowing you to choose your own public key algorithm, most of which use RSA today, but the perfor
certificate is sometimes called a number ***. A digital certificate is a piece of data that contains the user identity information, the user's public key information, and the digital signature of the identity authentication organization. The digital signature of the authentication organization can ensure the authenticity of the certificate information.
The complete PKI system should have the CA (Certificate Authority), the certificate registration system (RA), and the key management center (KMC
/www.localhost.com.crt;ssl_certificate_key /usr/local/https/www.localhost.com.key;Ssl_protocols TLSv1 TLSv1.1 TLSv1.2; #只允许TLS协议Ssl_ciphers ecdhe-rsa-aes256-sha384:aes256-sha256:rc4:high:! md5:!anull:!enull:! Null:! Dh:! edh:!AESGCM; #加密套件, here uses CloudFlare's Internet facing SSL cipher configurationssl_prefer_server_ciphers on; #由服务器协商最佳的加密算法ssl_session_cache builtin:1000 shared:ssl:10m;#Session Cache, the Session is cached to the server, which may consume more server resources ssl_session_t
://s3.51cto.com/wyfs02/M00/5B/35/wKioL1UCVjDDbPKPAAOUYSyaksI976.jpg "title=" QQ picture 20150313110908.png "alt=" Wkiol1ucvjddbpkpaaouysyaksi976.jpg "/>Then follow the wizard and click Next until the configuration is complete.650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/5B/3B/wKiom1UCVWeAMbKDAANRNuf5oKs789.jpg "title=" QQ picture 20150313111035.png "alt=" Wkiom1ucvweambkdaanrnuf5oks789.jpg "/>After you configure the Online Responder, log on LON-DC1 Open the Certification Authority
'; Ssl_prefer_server_ciphers on; # HSTS (Ngx_http_headers_module is required) (15768000 seconds = 6 months) Add_header strict-transport-security Max-age = 15768000; # OCSP stapling---# fetch OCSP records from the URL in Ssl_certificate and the cache them ssl_stapling on; Ssl_stapling_verify on; # # Verify chain of trust of OCSP response using Root CA
basis, or published on each update, and the CRL file can be transmitted over HTTP, or any other file transfer protocol. The list is also signed by the CA, which is usually allowed to be cached at the specified time interval. In practice, this process works well, but there are some scenarios in which the CRL mechanism may be flawed:
More and more revocation means that the CRL list is only getting longer, and each client must get the entire list of serial numbers
There is no certific
. * actual market share * business center of gravity * provide what services at the bottom line, the CA you choose should provide at least CRLs (certificatelist) and OCSP ( onlinecertificatestatusprotocol) recall mechanism and performance for OCSP services. NBSP;NBSP;CA provides at least domain name verification and extended certificate validation, ideally allowing you to choose the public key algorithm,
year. See "certificate verification ."If you want users to keep the data stored on their devices, make sure that the new version uses the same package ID as the replaced application. And tell the user not to delete their previous versions before installing the new version. The new version replaces the old version and retains the data stored on the device, provided that the package ID number must match.Certificate verificationWhen the application is enabled on the device for the first time, it i
How to Use the SARG log analyzer on CentOS to analyze Squid logs
In the previous tutorial, we showed you how to use Squid to configure transparent proxy on CentOS. Squid provides many useful features, but it is not straightforward to analyze an original Squid log file. For example, how do you analyze the timestamp and number in the following Squid log?
1404788984.4291162172.17.1.23 TCP_MISS/302436 GET http://facebook.com/-DIRECT/173.252.110.27 text/html
1404788985.04612416172.17.1.23 TCP_MISS
Grcaajlr2zxwcg957.jpg "" 579 "height=" 224 "/>
3. Ferry this domain name, found this site for online certificate status certification of a server, and Ca/pki high correlation
4. The following ca/pki is studied, and it is found that OCSP is a service for replacing CRLs (certificate revocation lists) for real-time querying of status information for certificates.
Reference Link: http://umtiger.blog.sohu.com/153079434.html
Http://baike.baidu.
automatically revoke his visa file crt and automatically update the CRL file. Pay special attention to reload or restart Nginx to allow Nginx to reload the CRL. The revoked certificate will not be able to access the site.
Summary
In this paper, we use the Nginx configuration SSL two-way authentication to the client encryption authentication, we used a simple script to help us quickly generate a variety of certificates and visas, eliminating the memory cumbersome OpenSSL command line, simplified
Max-age = 15768000; # OCSP stapling---# fetch OCSP records from the URL in Ssl_certificate and the cache them ssl_stapling on; Ssl_stapling_verify on; # # Verify chain of trust of OCSP response using Root CA and intermediate certs Ssl_trusted_certificate/path/to/root_ca _cert_plus_intermediates; Resolver
;
....}
Note: The HSTS (http
invalid. When a certificate is declared invalid, the Ca cannot notify all persons who have copied the certificate. Instead, CA releasesCertificate Revocation List (Certificate Revocation List)(CRL ). Browsers and other programs that use digital certificates can verify that the certificate has been revoked by its owner or Ca.You can also use the OCSP protocol to check the certificate revocation. OCSP repres
certificate revocation list (crl-certificate revocation list). browsers and other programs that use digital certificates can verify that this certificate has beenhas been revoked by its owner or CA. The revocation of certificates can also be checked using the OCSP protocol. NBSP;NBSP;OCSP represents the online certificate status Protocol (On-line Certificate Status agreement) it is defined in RFC 2560.
*/
/* Certificate status request info */
/* Status type or-1 if no status type */
Int tlsext_status_type;
/* Keep ct ocsp CertificateStatus message */
Int tlsext_status_expected;
/* OCSP status request only */
STACK_OF (OCSP_RESPID) * tlsext_ocsp_ids;
X509_EXTENSIONS * tlsext_ocsp_exts;
/* OCSP response encoded ed or to be sent */
Unsigned char * tlsext_ocsp_res
, meaning that so much data must be transferred before a connection can be established. If you do a simple PC web browsing, perhaps there will be no problem. But for mobile and program calls, this is a disaster. The best way to do this is to use OpenSSL with tools such as WireShark to test it yourself. If you are familiar with TCP-related knowledge, you can often get better optimization schemes. OCSP and CRLs are also not negligible. These two techniq
, the administrator typically creates a certificate for each user (typically containing the user's name and e-mail address). This certificate is placed in the browser and is checked by the server each time it connects to the server.7. When the private key is compromisedThe certificate can be revoked before it expires, usually because the private key of the certificate has been compromised. Newer browsers such as Google Chrome, Firefox[7], Opera[8], and Internet Explorer [9] running on Windows Vi
//Definition of a forced service processing (OCSP) commandObsess_over_hosts=1//configured as forced service (obsess over host) typeOchp_command=submit_host_check_result//define an forced host processing (OCHP) command4. Add OCSP command
When adding the Submit_service_check_result command, you need to add the PerfData data so that the Nagios will be able to generate a picture after receiving the data Pnp4na
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