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APC INFO Monitor

How to Configure APC Cache on Virtual Servers with PHP running under FCGId

…s several virtual domains with PHP under FCGId using APC for opcode caching: Joomla, PHPbb, WordPress, etc . APC is somewhat challenging to configure properly with fcgid-enabled virtual domains, but it is quite helpful to optimize system resources and prevent traffic surges on one site from affecting overall server performance. Joomla and PHPbb have code […]

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Install phpMyAdmin with SSL on CentOS, Amazon Linux, RedHat (Apache or NginX)

…C is another reactive IPTables firewall with Apache login failure IP blacklisting. For Amazon EC2, a good practice is to create a discrete database server, and only allow access to it inside a VPC security group, or from specific IP addresses enabled in that security group. That way, you can safely Allow from ALL hosts, […]

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Tuning Apache and MySQL for Best Performance in a Shared Virtual Hosting Environment

…l is an excellent free firewall & LFD. This will help prevent brute force probes, port flooding, DDOS, etc. If you have 600 virtual hosts running on a server, it is very likely that the server is experiencing constant malicious exploits, especially if you are also running email servers on the same IP addresses. If […]

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Apache and MySql Performance Tuning for High Traffic WordPress Website on Cpanel is a high traffic WordPress site with over 600,000 unique visitors and over 2,000,000 page impressions per month. It is a content republisher and aggregator, presenting custom XML feeds for (what else?) soccer news from all over the world. The site has a very active user base, providing content in the forms of editorials […]

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WordPress with W3 Total Cache on Nginx with APC (Virtualmin)

…I was very interested to see how Nginx performance compares to Apache for WordPress, and whether APC and W3TC would play nice with Nginx. I prefer to install WordPress in public_html/wordpress for ease of development, compatibility with other scripts, etc. Accordingly, the suggested configuration is for WordPress installed in a subfolder. This info also assumes […]

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Chris Gilligan Web Developer, Information Architect, Web Server Administrator, Media Producer web • video • print I design and produce information and communication media for university, corporate, small business, manufacturing and non-profit clients: web sites Information architecture and design for open source content management systems Front-end UI design, HTML, PHP, LESS Linux Apache […]

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WordPress Fail2Ban RegEx for RedHat, CentOS, Amazon Linux

VacantServer WordPress sites are getting hammered with bad logins and probes. We’ve implemented a plugin to log failed login attempts to syslog, and a Fail2Ban filter for the same. If you run these on RedHat, you’ll need some additional configuration info… here it is: WordPress login failure regex (error_log): ^%(__prefix_line)sAuthentication failure for .* from <HOST>$ […]

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APC INFO Monitor

APC Cache Considerations for Virtual Hosting Environments

APC cache does not work well in a virtual hosting environment unless PHP is running as FCGID, and every individual virtual host has a unique PHP.ini and a unique fcgiwrapper. This is not the case with many virtual hosting environments because the memory and CPU requirements are too great. I suggest using Virtualmin for a […]

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Fail2Ban Regex for RedHat, Fedora, CentOS and Amazon Linux 2013

Fail2Ban is a very efficient daemon that scans log files for malicious activity, and offers several options to ban offending IPs and hostnames. Although it is highly configurable, it requires a depth of knowledge beyond that required for GUI-accessible firewalls such as ConfigServer Security & Firewall. Harden the Kernel Before do anything further, it is […]

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