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You are here:Home » How To Configure OCSP Stapling On Apache 2.4+

By Abhishek Ghosh June 8, 2017 3:41 am Updated on October 16, 2017

How To Configure OCSP Stapling On Apache 2.4+

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Previously we talked about OCSP, OCSP Stapling and OCSP Stapling on Nginx. Now, we will configure OCSP Stapling In Apache 2.4 It is important to avoid some settings of OCSP Stapling on a production website as it can give errors like OCSP Response Expired or just in case of Nginx 502. Here is how to configure OCSP Stapling on Apache 2.4+ with full configuration. These are among TLS optimisazion. In our case, the server operating system in example is Ubuntu.

How To Configure OCSP Stapling On Apache 2-4+

 

How To Configure OCSP Stapling On Apache 2.4+

 

The file in the current context we will tweak is the default SSL configuration file for the active website, which can be :

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/etc/apache2/sites-available/default-ssl.conf

or

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---

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/etc/apache2/sites-available/000-default-le-ssl.conf

or of course it can be your custom named file. The reference of this guide on Apache’s site is :

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https://wiki.apache.org/httpd/OCSPStapling
https://httpd.apache.org/docs/2.4/mod/mod_ssl.html

Our that default SSL virtual host file looks like :

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<IfModule mod_ssl.c>
<VirtualHost *:443>
           ServerName thecustomizewindows.com
           ProtocolsHonorOrder On
           Protocols http/1.1 h2
           ServerAdmin admin@thecustomizewindows.com
           DocumentRoot /var/www/html
 
           ErrorLog ${APACHE_LOG_DIR}/error.log
           CustomLog ${APACHE_LOG_DIR}/access.log combined
 
SSLCertificateFile /path/to/ssl/cert.crt
SSLCertificateKeyFile /path/to/ssl/private.key
SSLCertificateChainFile /path/to/ssl/intermediate.crt
SSLOpenSSLConfCmd DHParameters "/path/to/dhparams_4096.pem"
...
...
SSLOpenSSLConfCmd ECDHParameters secp384r1
SSLOpenSSLConfCmd Curves secp521r1:secp384r1
...

Then add two lines above the block, SSLCryptoDevice not really related to it but there is reason to keep it :

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<IfModule mod_ssl.c>
SSLCryptoDevice dynamic
SSLStaplingCache shmcb:/etc/apache2/stapling_cache(128000)
<VirtualHost *:443>
           ServerName thecustomizewindows.com
           ProtocolsHonorOrder On
           Protocols http/1.1 h2
...
...

We will only add these four directions :

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SSLOCSPEnable on
SSLUseStapling on
SSLOCSPResponseMaxAge 900
SSLOCSPResponseTimeSkew 300

immediately after the SSL cert location (for convenience), so that full configuration looks like :

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<IfModule mod_ssl.c>
SSLCryptoDevice dynamic
SSLStaplingCache shmcb:/etc/apache2/stapling_cache(128000)
<VirtualHost *:443>
           ServerName thecustomizewindows.com
           ProtocolsHonorOrder On
           Protocols http/1.1 h2
           ServerAdmin admin@thecustomizewindows.com
           DocumentRoot /var/www/html
 
           ErrorLog ${APACHE_LOG_DIR}/error.log
           CustomLog ${APACHE_LOG_DIR}/access.log combined
 
SSLCertificateFile /path/to/ssl/cert.crt
SSLCertificateKeyFile /path/to/ssl/private.key
SSLCertificateChainFile /path/to/ssl/intermediate.crt
SSLOpenSSLConfCmd DHParameters "/path/to/dhparams_4096.pem"
SSLOCSPEnable on
SSLUseStapling on
SSLOCSPResponseMaxAge 900
SSLOCSPResponseTimeSkew 300
...

Then create a directory and give it proper permission for Apache :

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mkdir /etc/apache2/stapling_cache
chown www-data /etc/apache2/stapling_cache
chmod 755 /etc/apache2/stapling_cache

I am quite sure that you will asking about creation of the directory and giving permission. It is bypassing a bug in one pre-compiled version.

Now run configtest :

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apachectl -t

Then restart the Apache :

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sudo systemctl restart apache2.service

Of course test on SSL Labs :

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https://www.ssllabs.com/ssltest/analyze.html

Next, you should read ahead our next guide to optimise OSCP Stapling and prevent error.

Tagged With DHParameters , apache 2 4 ocsp , ocsp stapling windows , ocsp stapling , ocsp apache servername , how to set up default stapling , apache SSL , apache ocsp stapling , apache configuration file for ocsp , proxypass for ocsp service
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Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

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