56 lines
3.4 KiB
HTML
56 lines
3.4 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Control SNMP access" />
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<meta name="abstract" content="If you want to allow SNMP managers to access your system, you need to be aware of the following security issues." />
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<meta name="description" content="If you want to allow SNMP managers to access your system, you need to be aware of the following security issues." />
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<meta name="DC.Relation" scheme="URI" content="rzamvtcpsnmp.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="tcpcontrolsnmp" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Control SNMP access</title>
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</head>
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<body id="tcpcontrolsnmp"><a name="tcpcontrolsnmp"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Control SNMP access</h1>
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<div><p>If you want to allow SNMP managers to access your system, you need
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to be aware of the following security issues.</p>
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<div class="p">These security issues are important to be aware of:<ul><li>Someone who can access your network with SNMP can gather information about
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your network. Information that you have hidden by using aliases and a domain-name
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server becomes available to the would-be intruder through SNMP. Additionally,
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an intruder might use SNMP to alter your network configuration and disrupt
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your communications.</li>
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<li>SNMP relies on a community name for access. Conceptually,
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the community name is similar to a password. The community name is not encrypted.
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Therefore, it is vulnerable to sniffing. Use the Add Community for SNMP (ADDCOMSNMP)
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command to set the manager internet address (INTNETADR) parameter to one or
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more specific IP addresses instead of *ANY. You can also set the OBJACC parameter
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of the ADDCOMSNMP or CHGCOMSNMP commands to *NONE to prevent the managers
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in a community from accessing any MIB objects. This is intended to just be
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done temporarily to deny access to managers in a community without removing
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the community.</li>
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</ul>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzamvtcpsnmp.htm" title="SNMP provides a means for managing the gateways, routers, and hosts in a network environment.">Security considerations for SNMP</a></div>
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</div>
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</div>
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</body>
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</html>
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