Just found a few more IPs, to delete from csf.allow:BE AWARE! download.configserver.com has address 94.130.90.175. The IP is already taken and another website is hosted on the IP. SSL/TLS certificate is of course invalid, but they might place a download file there.
94.130.90.175 # download.configserver.com
54.36.165.115 # download2.configserver.com
66.165.246.166 # license.configserver.com
2604:4500:9:156::6 # ipv6.license.configserver.com