4 Questions

1. Change font of website. CSS? [login to view URL] This is one of my websites. Luckily, the website was totally in English so you will have no trouble to understand the content. I want to know the way to change the font of every single letters of the website. Do I modify CSS? There are hundreds of webpages in my website. How do I know where all the CSSs are for every words in my site? 2. Server environment Problem: My developer asked me to upload the website they developed to the server I rented. So I did. Then the website had the problem of not showing properly in some certain type of browsers (include IE). So my developer uploaded the website again to their own server, and the website could be shown properly in all types of browsers. I want to ask the reason for this. Could you answer? 3. Setting up VPN on my server I want to set up VPN on my server. Could you help me with this ? I have a Linux server based in Hong Kong. The o. s. is CentOS 6.5 If you have experience of setting up VPN on a Linux CentOS 6.5 server before, then please tell me your experience of this job. I would like to understand the mechanism of how VPN on a Linux CentOS server works. 4. CMS I think there are a number of CMS developed not by my website developer but by some people who develops CMS and publish them as open source so website developers like the one develops website for me could borrow the CMS they develops and fit it on to anyone's website. Is this true? In my opinion, some CMS are not quite good in look and also in function, and some CMS are slightly better than the others. I want to know, if designing CMS is only about PHP, MySQL and JavaScript ? If you have developed some CMS, could you explain to me how a CMS was built? How do you make a pre-designed CMS fit on a website?