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linux_wiki:apache_http_server [2016/01/30 23:58] billdozor [Compile and Install] |
linux_wiki:apache_http_server [2018/03/23 16:10] billdozor [SSL Verification] |
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**Checklist** | **Checklist** | ||
- | * Distro: Enterprise Linux 6 or 7 | + | * Distro(s): Enterprise Linux 6/7 |
---- | ---- | ||
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---- | ---- | ||
- | ===== Repo Install | + | ===== Repo: EPEL ===== |
* CentOS 6.7: Apache 2.2 | * CentOS 6.7: Apache 2.2 | ||
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yum -y install mod_ssl | yum -y install mod_ssl | ||
</ | </ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ===== Repo: Software Collections ===== | ||
+ | |||
+ | Versions as of 04/13/2016: | ||
+ | * httpd 2.4 | ||
+ | |||
+ | - Add the [[linux_wiki: | ||
+ | - Install< | ||
+ | - Enable the software collection< | ||
+ | - Control operation as below. | ||
---- | ---- | ||
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**Prerequisites** | **Prerequisites** | ||
* Install gcc in order to compile packages< | * Install gcc in order to compile packages< | ||
+ | * Install apr-devel, apr-util-devel, | ||
+ | * apr = Apache Portable Runtime | ||
+ | * pcre = Perl-Compatible Regular Expressions Library | ||
+ | * If you really want to compile these as well for newer versions, see here: [[http:// | ||
\\ | \\ | ||
**Install Procedure** | **Install Procedure** | ||
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* Visit the download page: [[http:// | * Visit the download page: [[http:// | ||
* Wget a link to the desired version(example with a mirror)< | * Wget a link to the desired version(example with a mirror)< | ||
- | * Extract Apache< | + | * Extract Apache< |
- | * Download APR and APR-Util into the httpd-2.4.18/ | + | cd httpd-2.4.18</ |
- | * Visit the download page: [[http:// | + | * Configure Apache from httpd-2.4.18/< |
- | * Wget a link to apr and apr-util(examples)< | + | |
- | wget http:// | + | |
- | wget http:// | + | |
- | * Extract APR and APR-Util< | + | |
- | tar -zxvf apr-util-1.5.4.tar.gz</ | + | |
- | * Rename APR and APR-Util dirs to loose the version number< | + | |
- | mv apr-util-1.5.4 apr-util</ | + | |
- | * Configure Apache from httpd-2.4.18/< | + | |
- | ./configure --prefix=PREFIX</ | + | |
* --prefix=PREFIX => Where " | * --prefix=PREFIX => Where " | ||
* Compile< | * Compile< | ||
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* Default: NameVirtualHost *:80 (and commented out) | * Default: NameVirtualHost *:80 (and commented out) | ||
- | Disable Trace/Track (a XSS Vulnerability) | + | Security Configs |
<code bash> | <code bash> | ||
+ | ##-- Security --## | ||
+ | #- Information Disclosure -# | ||
+ | ServerTokens Prod | ||
+ | ServerSignature Off | ||
+ | |||
+ | # FileETag: File attributes used to create the ETag HTTP response header for static files | ||
+ | FileETag -INode +MTime +Size | ||
+ | |||
+ | #- Web Application Security -# | ||
+ | # Trace/Track - disabled for security purposes | ||
TraceEnable Off | TraceEnable Off | ||
+ | |||
+ | # Cross-Frame Scripting prevention (click jacking) | ||
+ | # DENY = Deny all attempts to frame the page | ||
+ | Header always append X-Frame-Options DENY | ||
+ | |||
+ | # Cross Site Scripting protection | ||
+ | Header set X-XSS-Protection "1; mode=block" | ||
+ | Header edit Set-Cookie ^(.*)$ $1; | ||
+ | ##-- End of Security Settings --## | ||
</ | </ | ||
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Protocol and Ciphers | Protocol and Ciphers | ||
<code bash> | <code bash> | ||
- | SSLProtocol | + | SSLProtocol TLSv1.2 |
- | SSLCipherSuite HIGH:!DHE:!EDH:!RC4:!ADH:!MEDIUM | + | SSLCipherSuite HIGH:!MEDIUM:!3DES:!ADH:!AECDH:!DHE: |
</ | </ | ||
* Default SSLProtocol: | * Default SSLProtocol: | ||
Line 137: | Line 163: | ||
</ | </ | ||
- | ==== SSL Verification ==== | ||
- | Check what ciphers will be used given an Apache config | + | ---- |
- | <code bash> | + | |
- | openssl ciphers | + | |
- | </ | + | |
- | Verify server offered ciphers | + | ===== Other Security Settings ===== |
- | <code bash> | + | |
- | sslscan | + | Other important security settings. |
- | </ | + | |
- | * Look for " | + | ==== Redirect HTTP to HTTPS ==== |
+ | |||
+ | Redirect all HTTP to HTTPS<code bash>< | ||
+ | ServerName example.com | ||
+ | < | ||
+ | RewriteEngine On | ||
+ | RewriteCond %{HTTPS} off | ||
+ | RewriteRule (.*) https:// | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ==== HSTS ==== | ||
+ | |||
+ | Enabling HTTPS Strict Transport Security (HSTS). | ||
+ | |||
+ | Add the strict transport security header to the listening HTTPS host section | ||
+ | <code bash># Optionally load the headers module: | ||
+ | LoadModule headers_module modules/ | ||
+ | |||
+ | < | ||
+ | Header always set Strict-Transport-Security " | ||
+ | </ | ||
+ | * max-age=63072000 -> Tell web browsers to connect to the site using HTTPS only for two years. Countdown is reset each time the site is visited. | ||
---- | ---- | ||
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192.168.1.150 server1 mysite.example.com</ | 192.168.1.150 server1 mysite.example.com</ | ||
* Sample of what visiting each site looks like:{{ : | * Sample of what visiting each site looks like:{{ : | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ====== Operation ====== | ||
+ | |||
+ | Controlling the Apache httpd service: Apache recommends using the " | ||
+ | |||
+ | * After sending a signal to httpd, watch its progress in the error_log file: logs/ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ==== Start ==== | ||
+ | |||
+ | * Check syntax, if errors are found, refuse to start. | ||
+ | * Start the httpd process and start the number of workers specified on the config files via the " | ||
+ | |||
+ | <code bash> | ||
+ | apachectl -k start | ||
+ | </ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ==== Stop ==== | ||
+ | |||
+ | * Immediately stop the httpd process and kill workers. | ||
+ | * User connections in progress are terminated. | ||
+ | |||
+ | <code bash> | ||
+ | apachectl -k stop | ||
+ | </ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ==== Graceful Restart ==== | ||
+ | |||
+ | * Check syntax, if errors are found, refuse to restart. | ||
+ | * Parent process advises that workers shutdown after their current requests. | ||
+ | * Once all workers have finished and exited, start up. | ||
+ | * This does **not** interrupt user connections. | ||
+ | |||
+ | <code bash> | ||
+ | apachectl -k graceful | ||
+ | </ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ==== Restart ==== | ||
+ | |||
+ | * Check syntax, if errors are found, refuse to restart. | ||
+ | * Parent process kills workers, then starts up. | ||
+ | * This interrupts user connections. | ||
+ | |||
+ | <code bash> | ||
+ | apachectl -k restart | ||
+ | </ | ||
+ | |||
+ | ---- | ||
+ | |||
+ | ==== Graceful Stop ==== | ||
+ | |||
+ | * Parent process advises that workers shutdown after their current requests. | ||
+ | * New requests are not accepted. | ||
+ | * This does **not** interrupt user connections. | ||
+ | |||
+ | <code bash> | ||
+ | apachectl -k graceful-stop | ||
+ | </ | ||
---- | ---- | ||