How can I tell if I’m having a DDoS attack against my site?

There are a few easy to spot clues that you're having a DDoS attack against your site. They are:

1. Your site’s responsiveness will be very slow to respond to requests and/ or be totally unresponsive to requests.

2. If you check your server stats, you will also see a huge increase in visitors or bandwidth requests in a short period of time being directed against the site.

3. If you look at the server logs for your site, you will also see a lot of strange requests to your site that don’t match normal visitor behavior.

Related: Mitigating a DDoS attack