We have made some major improvements to our server architecture here at 4W Towers, switching from Apache to Litespeed and complying with Payment Card Industry (PCI) requirements for sotring payment card data.

Litespeed
Litespeed is fast web server software that has 95% of the features of Apache but runs much faster – from Litespeed Technologies:
LiteSpeed Web Server has superior performance in terms of both raw speed and scalability. Our benchmarks demonstrate that it is more than 6 times faster than Apache. When serving static content, LiteSpeed surpasses well-respected content accelerators … When it comes to dynamic content, LiteSpeed is more than 50% faster in PHP content delivery than Apache with mod_php.
PCI Compliance
After much tweaking of files we have managed to attain PCI compliance for one client, and in the process securing the entire server. Should any future clients require PCI compliance this will now be a simpler process.