I am using the forum now and it is working perfectly fine. But since you have written this post 4 hours ago, there might be an issue with the site.
However i did see the "Checking your browser before accessing" at the start, don't know why. I hope there was no DDOS attack.
That happens when CloudFlare scans the clients (you and me) before allowing us to access the forum as an anti-bot measure.
So when does cloudflare scan the client ? Is there any specific interval or it should scan once you access the site everyday ?
I rarely get this message on my browser, perhaps once a month or so.
CloudFlare has their own algorithm on doing so. But to put it simply, if your IP/ client is deemed suspicious or it's new, you'll see it more frequently. But rest assured its nothing serious unless your device is part of a botnet.
I've solved lots of reCAPTCHA/ hCAPTCHA so the screen shows up every so often.