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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

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icmp netmask request

Vulnerability Assessment Summary Sends an ICMP_MASKREQ Detailed Explanation for this Vulnerability Assessment The remote host answered to an ICMP_MASKREQ query and sent us its netmask . A possible hacker can use this information to understand how your network is set up and how the routing is done. This may help him to bypass your filters. Solution : reconfigure the remote host so that it does not answer to those requests. Set up filters that deny ICMP packets of type 17. Network Security Threat Level: Low Networks Security ID: Vulnerability Assessment Copyright: This script is Copyright (C) 1999 Renaud Deraison

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