Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

Get The TCP/IP Guide for your own computer.
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  TCP/IP Network Configuration and Management Protocols (BOOTP, DHCP, SNMP and RMON)
           9  TCP/IP Network Management Framework and Protocols (SNMP and RMON)
                9  TCP/IP Internet Standard Management Framework Overview, Architecture, Components and Concepts

Previous Topic/Section
TCP/IP Internet Standard Management Framework Architecture and Protocol Components
Previous Page
Pages in Current Topic/Section
1
2
34
Next Page
TCP/IP Internet Standard Management Framework and SNMP Standards
Next Topic/Section

TCP/IP Internet Standard Management Framework and SNMP Versions (SNMPv1, SNMPv2 Variants, SNMPv3)
(Page 2 of 4)

SNMPv1

The first version of SNMP was developed in early 1988, and published in the form of three RFC standards in August 1988. This first version is now known as SNMP version 1 or SNMPv1. The three SNMPv1 standards provided the initial description of the three main Internet Standard Management Framework components: the Structure of Management Information (SMI), Management Information Bases (MIB) and the SNMP protocol itself. However, the term “Internet Standard Management Framework” was not actually used at that time.

SNMPv1 was generally accepted and widely deployed in many networks. SNMPv1 got the job done and became the standard for TCP/IP network management; it is still widely used today. It is the “Old Faithful” of SNMP versions. Slight revisions were made to the initial standards and more and more MIB modules were defined over time, but the technology remained the same for a number of years.

As with any technology, users of SNMPv1 identified weaknesses in it and opportunities for improvement, over time. One of the areas in which SNMPv1 was most criticized was the area of security. SNMP version 1 used only a “trivial” (as RFC 3410 puts it) authentication scheme using a password-like construct called a community string.

The issue of security turned out to be the bone of contention that eventually led to serious problems in the development of SNMP. Some people felt that community strings were sufficient security, but many others felt it was important that better security be put into SNMP. There were many different ways proposed to add security to SNMP, and no universal agreement on how to do it. The points raised about the security weaknesses in the original SNMPv1 had some validity, as I explore in the SNMP protocol operations section.

SNMPsec

The first attempt to add security to SNMP came in the form of three standards published in July 1992 that defined a new security mechanism using logical identifiers called parties. This is sometimes called SNMP Security or SNMPsec. This method was more secure than the original SNMPv1, but SNMPsec was never widely accepted, and is now considered “historic”.


Previous Topic/Section
TCP/IP Internet Standard Management Framework Architecture and Protocol Components
Previous Page
Pages in Current Topic/Section
1
2
34
Next Page
TCP/IP Internet Standard Management Framework and SNMP Standards
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.