It may be necessary to add firewall exceptions for the IP addresses used by Qlik licensing services.
Note that we do not recommend using IP addresses for exception lists unless absolutely necessary. Wherever possible configure the exception list for *.qlikcloud.com or *.qliktech.com respectively.
All nodes in a Qlik Sense Enterprise on Windows on-premise multi node environment need to have access to these addresses.
Qlik has two licensing backends. The main License Backend hosted by license.qlikcloud.com and our Legacy Activation Service (commonly referred to as LEF) hosted on lef1 through lef4.qliktech.com.
The IP addresses behind license.qlikcloud.com are rotated and not fixed. Use the DNS name when configuring firewall exceptions.
If your firewall requires you to use IP addresses, please note that they may change. To verify the IP addresses currently used, open command prompt and type nslookup license.qlikcloud.com.
There are 4 LEF servers (lef1.qliktech.com, lef2.qliktech.com, lef3.qliktech.com, lef4.qliktech.com). The IP addresses behind these servers are fixed.