Question Integration of Joomla 1.5 login with Kunena login

I just downwloaded and installed the latest Kunena version, integrated into a Joomla 1.5 website. I'm a real newbie.
Please detail how the login buttons from Joomla and from Kunena interact in their functionality?
they are both present on the site page where the forum is located.
Does a Joomla login to the site give the user the same permissions on the Kunena Board as doing a Kunena login?
Reciprocally, if a user first goes to the forum and logs in on Kunena, does that register them on the site with the same permissions as doing a Joomla login?
If both are true,
It seems it would be easier for users if the Joomla (site) login could work for both the site and the forum?
Should I leave both logins on? If not,
Which of the logins should I use on the forum page?

Also, if a user has already registered on the site, then registers with a different username for the Kunena forum, but with the same email address, is the registration going to be halted/flagged as being a duplicate?

G'day, kbkounyea, and welcome to Kunena.

You can use any Joomla login module you like. See How do I register new users to my website and where should they login to use my website? (one of the many frequently-asked questions about Kunena on the FAQs menu item at the top of this forum).

You can use the Kunena Login module, or your own Joomla login module or the login form on your forum. The choice is really up to you. Have a look at how it's done here on this website ( www.kunena.org ).

People cannot register with different usernames but with the same email address. That's a security feature of Joomla. That's also why I moved your question into this category: Miscellaneous, off-topic and general Joomla

You indicate that which login interface is used to get on the forum does not matter;
I think you mean that registration to the overall site, let's say, on the Home page, or to the Forum itself, are one and the same? But reading the link you gave me it says
"Kunena is not responsible for user registration or login to your website".
so I'm back to my question: is one of these logins a child of the other?
If a user first registers on the forum, does it mean the user is not yet registered on the site, for instance, this user could not post comments to articles posted on other pages?
And if a user first registered on the site, is this user automatically logged in as well to the forum?
Are the datbases used for login both ways (site or forum) one and the same?

You mentioned a "Kunena login" module; how does it differ from the login interface that the Kunena forum comes with? Does it allow the administrator to ask and filter for more questions, like, "are you over 18"?

Sorry to ask all these very basic questions, I did find the wiki but there is not very much info there. The "Tips and Tricks" section is very promiding but unfortunately, they do not mention the versions they apply to, and I expect some may have been written for older versions.
Being new to Kunena, I need to know, are all instructions upward-compatible from older versions?

Please read the FAQs and the sticky topics in this category. Users register with the site. Unlike free-standing forum software (like phpBB or SMF) users do not have to register twice (one with the site and the other with the forum).

Login modules are Joomla modules. There is not hierarchy here - no one module is a "child" of another. These kinds of issues are best explained on the Joomla forum ( forum.joomla.org ).

Because Kunena is not involved with site registration, questions like "does the Kunena registration challenge users to verify they are over 18" do not apply. If you want your user registration procedure to challenge prospective users in this way, that's a question you need to ask of people who design user registration software for Joomla.

I suggest that you read the FAQ reference I gave earlier and to read a more comprehensive discussion of many of the issues you've raised here: www.kunena.org/forum/154-miscellaneous-o...in-to-use-my-website