There is not much for this, and it seems they like to be unknown. There is no web site for furanet.com. Let me try to tease their pattern.
93.93.68.0/24
COMVIVE SERVIDORES S.L.
Sevilla, Spain
email@comvive.es
My content scraper host name was 98-68.furanet.com. It looks like their pattern or strategy is a reverse order domain name with the first 2 octets missing. Looking at their IP range I would guess 93.93.64.0/21, which covers the 68 of 98-68.furanet.com. From my Google search I’ve added 91.192.108.0/22 which they also commonly use.
Ban these most commonly used IPs:
91.192.108.0/22
93.93.64.0/21
These IPs could be banned in the future:
5.145.168.0/21
37.235.53.0/24
37.252.96.0/24
151.236.23.0/24
158.255.238.0/24
185.50.196.0/22
185.66.175.0/24
185.76.77.0/24
185.86.210.0/24
185.104.152.0/24
185.129.248.0/24
185.129.249.0/24
192.71.213.0/24
195.78.228.0/22
Pattern Examples, There are others:
1-108.furanet.com points to 91.192.108
1-110.furanet.com points to 91.192.110
1-111.furanet.com points to 91.192.111
22-168.furanet.com points to 5.145.168.22
s70-169.furanet.com points to 93.93.70.169
73-68.furanet.com points to 93.93.68.73
132-111.furanet.com points to 91.192.111.132
133-111.furanet.com points to 91.192.111.133
145-111.furanet.com points to 91.192.111.145
151-154.furanet.com 198.50.154.151 OVH
158-228.furanet.com points to 195.78.228.158
162-67.furanet.com points to 93.93.67.162
177-67.furanet.com points to 93.93.67.177
195-108.furanet.com points to 91.192.108.195
230-108.furanet.com points to 91.192.108.230