I configured Client IP header name with "X-Forwarded-For" in top because is the header used in Application monitored. But Dynatrace receive all Ip with a "0" at the end.
X-Forwarded-For value : 184.108.40.206 ==> in Dynatrace 220.127.116.11
So For Each 999.999.999.xxx address , Dynatrace receive 999.999.999.0 in one cession group.
Answer by Sebastian K. ·
This is because by default Dynatrace is masking IP addresses by adding 0 to last section. Go to Settings => Preferrences => Data privacy
Here you can change this behavior.