There not much performance difference between MYSQL 4 and 5 as far as you’re not using mysqli ext for your PHP scripts, but it nice to find rpms ready on Centos.org which makes the job much easier.
Check Configuring iptables on CentOS post.
Why should you do that while APF or CSF can do it automatically?
Because APF/CSF could block an important bot testing your server to add to search index. So reviewing every ip would be a daily task!
Ok, so how?
using RHEL4, centos4
Trying to pick up random keys from an array but don’t want any duplicates?
try this
This is some way you can get Google results as a JavaScript array that you can display on any page, you first need to get your Google API Key then try this code…
Compress your HTML, CSS and Javascript using simple PHP Code
Although Compression is a very important method of making your pages lighter and easier for users to download, it’s definitely going to cost you more CPU and on high load servers it’s not recommended unless you already know how to cache your HTML pages.