****'s scanning process determines whether the IP address is reachable. If the IP address is reachable, more comprehensive scans are then performed. ****’s External Intrusion Testing revealed traceroute vulnerabilities on each server, and an ICMP vulnerability on the ***.***.**.*** host. These are all low-level vulnerabilities.

Recommendation
Prevent or limit external tracerouting into internal networks using packet filtering.

This is from an external Audit just done there is a aplce for my reponse but I am not sure what to say...