IpserverOne has a couple of DDOS mitigation procedures.
The simplest one for our daily operations is a local mitigation.

Simply visit this URL: https://210.5.40.55/netmon/

We would need to login before we see the page below. Please get the login details from a senior.
Once logged in, simply click on “Local Mitigation”, insert the IP in the box and click “Protect this IP”.

The mitigation system will block any DDOS attack towards the protected IP.