# Cannot verify license

{% hint style="info" %}
**There are several reasons that can cause this problem. Make sure you check all of them.**
{% endhint %}

1. Make sure your **firewall is not blocking** ports 80/443.
2. Check the version of your server. *Old server versions can cause timeout requests.*
3. AntiDDOS may be blocking our server.

For the point 3. You will need to allow these IPs mentioned below

1. 193.70.80.3
2. 2001:41d0:303:203::