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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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NIS server

Vulnerability Assessment Summary Checks the presence of a RPC service Detailed Explanation for this Vulnerability Assessment The remote host is a NIS server. NIS is used to share password files among the hosts of a given network, which must not be intercepted by a possible hacker. Usually, the first step of their attack is to acertain whether they are attacking a NIS server, which make the host a more valuable target. Since we could acertain that the remote host is a NIS server, they can acertain too, which is not a good thing. Solution : filter incoming TCP and UDP traffic to prevent them from connecting to the portmapper and to the NIS server. Network Security Threat Level: Low Networks Security ID: Vulnerability Assessment Copyright: This script is Copyright (C) 1999 Renaud Deraison

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