ICMP Netmask Request Information Disclosure
Info Nessus Plugin ID 10113
SynopsisThe remote host is affected by an information disclosure vulnerability.
DescriptionThe remote host answers to an ICMP_MASKREQ query and responds with its netmask. An attacker can use this information to understand how your network is set up and how routing is done. This may help him to bypass your filters.
SolutionReconfigure the remote host so that it does not answer to those requests. Set up filters that deny ICMP packets of type 17.