Error:-

• cookie ip check: IP address has changed
• Your IP address has changed. Please login again
• Redirecting the cPanel again to login page

Solution:-

1. Login to the Dedicated Server WHM as root user.
2. Go to the path,

Home » Service Configuration » Tweak Settings

1. Security >> Cookie IP validation >> Choose “disabled“
2. disabled — Does not validate IP addresses.
3. loose — The access IP address and the cookie IP address must be in the same class C subnet.
4. strict — The access IP address and the cookie IP address must match exactly. This is the default value
5. Click Save.

Once we disbaled “Cookie IP validation” option, it will allow the IP addresses to access the server without validating.