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1. #Use openssl to disable weak tls versions in apache generator#
2. #Use openssl to disable weak tls versions in apache android#

Nginx # Enable TLSv1.2, disable SSLv3.0, TLSv1.0 and TLSv1.1 The syntax for enabling/disabling TLS protocols and cipher suites will vary slightly depending on the web server.

#Use openssl to disable weak tls versions in apache android#

The following is a breakdown of the modern profile (oldest compatible clients: Firefox 27, Chrome 30, Internet Explorer 11 on Windows 7, Edge, Opera 17, Safari 9, Android 5.0, and Java 8).

#Use openssl to disable weak tls versions in apache generator#

You may use the Mozilla SSL Configuration Generator to obtain an optimal TLS configuration using different browser profiles ( modern, intermediate, or old). the need to support legacy browsers and regulatory requirements) you may need to use slightly different cipher suite configurations. If you disable TLS 1.0 and TLS 1.1, the following user agents and their older versions will likely be affected (specific user agent versions on different operating systems may vary).ĭepending on your business use case (e.g. The PCI DSS also prohibits the use of the RC4 bulk cipher. However, due to the latest attacks on RC4, Microsoft has issued an advisory against it. In the past, RC4 was advised as a way to mitigate BEAST attacks. DES can be broken in a few hours and RC4 has been found to be weaker than previously thought. You should also disable weak ciphers such as DES and RC4. If you must still support TLS 1.0, disable TLS 1.0 compression to avoid CRIME attacks. These protocols may be affected by vulnerabilities such as FREAK, POODLE, BEAST, and CRIME. It also strongly suggests that you disable TLS 1.1. The PCI DSS (Payment Card Industry Data Security Standard) specifies that TLS 1.0 may no longer be used as of June 30, 2018. Unless you need to support legacy browsers, you should also disable TLS 1.0 and TLS 1.1. Therefore, unless you still need to support the legacy Internet Explorer 6 browser, you should disable SSL 3.0 as outlined below. Internet Explorer 6 is the only browser that still uses SSL 3.0. Furthermore, you cannot use elliptic-curve cryptography (see below) with SSL 3.0. If it is enabled, an attacker may retrieve plain text content of secure connections. Due to the POODLE (Padding Oracle On Downgraded Legacy Encryption) vulnerability, SSL 3.0 is also unsafe and you should also disable it. In 1996, the protocol was completely redesigned and SSL 3.0 was released.īecause of the security issues, the SSL 2.0 protocol is unsafe and you should completely disable it.

This version of SSL contained several security issues.

SSL 2.0 was the first public version of SSL. Below is a list of recommendations for a secure SSL/TLS implementation.

If you use them, the attacker may intercept or modify data in transit. Old or outdated cipher suites are often vulnerable to attacks.

Many common TLS misconfigurations are caused by choosing the wrong cipher suites. Bad TLS configurations may provide a false sense of security and make websites and web applications vulnerable to attacks. However, getting a correct TLS implementation may be difficult. It may therefore also be considered a requirement for serving websites and web applications. Major browsers mark sites as not secure in absence of TLS. TLS is now a requirement in several regulatory standards.