That seems to mean not running IIS, or IIS is behind something sanitizing the range field (load balancer, apache/nginx, proxy, IPS, etc)
"or IIS is behind something sanitizing the range field (load balancer, apache/nginx, proxy, IPS, etc)"... If this is the case, would that mean the server is not at risk? thanks!
that means the server response was something different from expected, either the server is not running IIS or it is running another (older ?)version.