...Hi again,

* *Sorry if I'm being so annoying and asking so many questions* *

I'm having trouble that one of my forums was having 13 people online at the same time. The problem is that my forum has only 20 registered members and none of them said that they've been online during that period. So here comes the question: Can I see who has been onlining for that certain period of time?

Pls help.

Hello sfwonders.
Often they are some search engines bots (like Googlebot, etc.).
You can check who visited your forum adding an hit counter, for example like this one:

Only registered users can see links on this forum! Register or Login on forum!

It's free and it tells you lots of information about the activity of your forum (but not about bots, only about people who visited your forum or website).

But you can't look back who visited your forum at the moment of the 13 users online.

If they are users and not bots, you can see the hour when they came to the forum and which pages they looked at.
For example, if 13 users connected to the forum at 04:00 pm together, you see 13 different IPs and where they come from.
Here's the image, just to show how it works (and then because it's easier to understand an image than reading my bad English... )
I've deleted all IPs and one link because of privacy:

Only registered users can see links on this forum! Register or Login on forum!

then where can I find this page?

And... The time the 13 people were online, I wasn't...

Without the hit counter you cannot see who was online last days, so in this case you cannot know who the 13 people are.
Sorry, I misunderstood your first request.

sfwonders wrote:

then where can I find this page?

Here's the link of the hit counter I'm using:

Only registered users can see links on this forum! Register or Login on forum!

You can search for other counters if you wish, just making a Google search.

After registering, it's easy to configure.
Then, copy the code that the counter will generate and paste it at the bottom of the forum:
Admin Panel --> General Admin --> ForumUp --> HTML codes on top and bottom of all forum pages --> Code at the bottom of the forum, after all topics -- paste the code and click on Edit Allow HTML.

Thanks. I've got everthing sorted out.