Proper management of www.domain.com and domain.com

I seem to have been running this issue a lot recently. How is this typically handled? What does it impact? Is it only a cookie-setting thing?

Should one resolve to the other somehow? Does it always have to be explicitly set? If so, where? 开发者_运维知识库:)

Does it impact how sessions are handled?

Thanks, Alex

You should be more specific if I didn't give you the right answer, But from what I understand is that you want to know what the urls should resolve.

As far as DNS goes, both www.domain.com and domain.com are an A (ip) record to your webserver.

Inside your webserver both www.domain.com and domain.com should refer to the same (root) directory of your site.

So like I have: DNS server: www.domain.com and domain.com -Resolve To- xxx.xxx.42.53

WEB server: www.domain.com and domain.com -Resolve To- /var/www/domain/

This is how it's managed by most sites