![]() ![]() Now make sure to thoroughly test access to the web server using whatever clients or applications are involved to confirm success. Save the file in the editor, then restart the Apache service for it to take effect: This setting ensures the server’s cipher preferences are followed instead of the client’s for consistency. # considered compromised, too.SSLHonorCipherOrder on # compromised, captures of past or future traffic must be # have perfect forward secrecy - if the server's key is # (as in the example below), most connections will no longer # Caveat: by giving precedence to RC4-SHA and AES128-SHA # to the SSLCipherSuite list, and enable SSLHonorCipherOrder. # you might want to force clients to specific, performance# optimized ciphers. # If speed is your main concern (on busy HTTPS servers e.g.), # Speed-optimized SSL Cipher configuration: Now add “SSLHonorCipherOrder on” under “SSLCipherSuite HIGH:!aNULL:!MD5:!3DES” or scroll down to the “Speed-optimized SSL Cipher configuration:” section and add it underneath (it doesn’t really matter where you actually add these settings, but it helps to keep things uniform so all configuration files have appropriate sections for settings).: This setting ensures only high-security SSL Ciphers will be used. # SSL Cipher Suite:# List the ciphers that the client is permitted to negotiate.# See the mod_ssl documentation for a complete list.#SSLCipherSuite HIGH:MEDIUM:!aNULL:!MD5:!SEED:!IDEASSLCipherSuite HIGH:!aNULL:!MD5:!3DES # SSL Cipher Suite:# List the ciphers that the client is permitted to negotiate.# See the mod_ssl documentation for a complete list.SSLCipherSuite HIGH:MEDIUM:!aNULL:!MD5:!SEED:!IDEAĥ.Comment out “SSLCipherSuite HIGH:MEDIUM:!aNULL:!MD5:!SEED:!IDEA” and add this line below it: This setting turns off TLS 1.0/1.1 and SSL 2.0/3.0.Ĥ.Look for the SSL Cipher Suite section. Disable SSLv2 access by default:#SSLProtocol all -SSLv2 # SSL Protocol support:# List the enable protocol levels with which clients will be able to# connect. SSLProtocol all -SSLv2 -SSLv3 -TLSv1 -TLSv1.1 Disable SSLv2 access by default:SSLProtocol all -SSLv2ģ.Comment out “SSLProtocol all -SSLv2” and add this line below it: SEE: 20 vacation reads that take a fictional look at real technology (free PDF) (TechRepublic)ġ.Use vi (or vim) to edit /etc/httpd/conf.d/ssl.conf (or wherever the ssl.conf file pertaining to this Apache installation is located)Ģ.Look for the “SSL Protocol Support” section. Keep in mind modern web browsers will support TLS 1.2 and should have no issues with the change, but always enact changes of this nature on development systems first then confirm functionality before moving onto production systems. These should be researched in advance to determine their capabilities, and upgrade them if necessary. It’s easy to eliminate TLS 1.0/1.1 and SSL 2.0/3.0 on an Apache web server (which constitutes nearly half of all websites) in favor of utilizing TLS 1.2 exclusively, but it’s important to note that older clients or applications which connect to these sites may be impacted if they are unable to support TLS 1.2. Open source: Must-read coverageĦ Best Linux project management software in 2023Ħ best open-source kanban boards for managing projects in 2023Ħ Best Free Alternatives to Microsoft Word (2023 Update) All four of these outdated protocols should be removed from use, especially in environments which require high security levels. TLS version 1.0 in particular contains vulnerabilities to certain malware attacks. The TLS 1.0/1.1 and Secure Sockets Layer 2.0/3.0 protocols are deprecated and provide insufficient cryptography for securely transmitting data. Starting June 30, 2018, websites will need to stop supporting Transport Layer Security (TLS) version 1.0 in order to remain PCI compliant. ![]()
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