I have a site… let’s call it mysite.com. On this site, there’s the sign up section which I think should be the secure part of this site.
a) Should I enable ssl on the entire site, or just the sign up part (e.g. signup.mysite.com)
b) What are the pros and cons of enabling it for the whole site?
Forcing entire site to use SSL will eat your bandwidth since all content is encrypted, including images. Please check apache ssl faq for more info