This file contains a summary of the major changes in released revisions.

Please see the CHANGES file for a more detailed list of specific bugs/patches

that have been fixed/applied, and the ChangeLog file for a comprehensive

listing of all changes made to the code.

*5.8*

    snmplib:

      - TLS/DTLS fixes

      - fix usm keychanges for new algorithms and longer keylengths

      - IP address formatting fixes

      - BUG: 2592: from Stuart Kendrick - increase MAXTC to 16384

      - add new sha2 auth protocols

      - Restore AES-192 and AES-256 privacy protocols - from

	draft-blumenthal-aes-usm-04 (precursor to RFC 3826)

        - Use OIDs from http://www.snmp.com/eso/esoConsortiumMIB.txt

        - Some code borrowed from PATCH 1346, thanks to

          Alexander Ivanov and Vladimir Sukhorukov.

      - BUG: 2622: Fix excessive indents in log file

      - new config tokens:

        - sendMessageMaxSize

        - disableSNMPv1 / disableSNMPv2c

      - new api for dynamic debug log level (netsnmp_set_debug_log_level)

    snmpd:

      - SNMP-TARGET-MIB: Fix snmpTargetAddrTAddress

      - Com2sec and com2sec6 SOURCE values may deny sources as well as

        permit.

      - allow trap sinks to set Target-MIB characteristics (name, tag, profile)

      - add source addr/port option to trapsink/trap2sink/informsink

      - packet filtering by source ip (enableSourceFiltering/filtersource)

      - several getbulk handling improvements

      - several new APIs introduced for run-time configuration of agent:

        - netsnmp_vacm_simple_usm_add/del

        - usm_create_usmUser_*

        - netsnmp_udp_com2SecEntry_create/netsnmp_udp_com2SecList_remove

        - netsnmp_agent_listen_on to open agent port

    Win32:

      - Add support for the DTLS-UDP and TLS-TCP transports

    scripts:

      - A new 'checkbandwidth' script to check host min/max bandwidth

    snmptranslate:

      - Introduce bulk translation mode The special argument "-" causes

	snmptranslate to enter bulk translation mode, in which it expects

	one OID per line.  Whitespace is treated as the end of the OID, and

	only that portion of the line is replaced, meaning that this can be

	used to translate, e.g., "snmpwalk" output without the proper MIBs

	loaded: snmptranslate -m all -OX < numeric.txt > symbolic.txt

    building:

      - Add Travis and Appveyor CI support

      - IPv6 support is now compiled by default.  If you need an IPv4-only

	agent, use --disable-ipv6.

      - Fixed/improved support for several non-Linux platforms

      - Many fixes found by Coverity anf Fortify scans

*5.7.3*

    Many many bug fixes and minor improvements

    snmpd, snmptrapd and apps:

      - Patch 2525: from Ryan Steinmetz: Fix argument length parsing of the

	host resources mib

      - Make ENV_SEPARATOR_CHAR configurable

      - SECURITY: a denial of service attack vector was discovered on

        the linux implementation of the ICMP-MIB.  This release fixes

        this bug and all users are encouraged to update their SNMP

        agent if they make use of the ICMP-MIB table objects.

    perl:

      - BUG: 2402: Add support for SNMPv3 traps

    Windows:

      - Port batch build infrastructure to Visual Studio 2010 and later

	From Visual Studio 2010 on it is no longer possible to specify

	include or library directories globally - these have to be

	specified per project. Hence two additional menu entries in

	build.bat that allow to specify these directories.

      - Patch from Bart Van Assche to improve cygwin building

*5.7.2*

    snmp:

      - BUG: 3526549: CVE-2012-2141 Array index error leading to crash

    snmpd:

      - BUG: 3532090: Fix high ifIndex values crashing hrDeviceDescr

    building:

      - PATCH: 2091156: correctly declare dependencies in Makefile. 'make

        -j <N>' should work now. Backport this to V5-4 as it is needed for

        correct operation in the single threaded case of make miblib as

        well.

    Many other miscellaneous minor bug fixes

*5.7.1*

  libnetsnmp:

      - Fixed the mib-parsing-bug introduced shortly before 5.7

  agent:

      - fixed rounding errors for disk percentage calculations

  openbsd:

      - better support for recent openbsd releases

  features:

      - bug fixes with minimalist support after additional user feedback

  Many other miscellaneous minor bug fixes

*5.7*

  snmpd:

      - Delivery of data via regularily scheduled notifications.

        (see "Data Delivery via Notfications" in snmpd.conf)

      - Many time-based config options can take (m)ins, (h)ours, ... arguments

        (see the snmpd.conf manual page)

      - The PING and TRACEROUTE MIBs now compile and work-ish on linux

        http://www.net-snmp.org/wiki/index.php/DISMAN

      - Mib handlers can now implement a data_clone function for

        cloning the myvoid structure variable to avoid dangling pointers

      - Fixed persistent storage of VACM MIB configuration

      - Multi-homed agents send UDP responses from the proper IP address

      - The hrStorageTable implementation now supports large filesystems better

      - optimizations for large route tables

      - Added a deliveryByNotify config token for regular data delivery

        (see the snmpd.conf manual page and the NET-SNMP-PERIODIC-NOTIFY-MIB)

      - [PATCH 3141462]: fix agentx subagent issues with multiple-object requests

      - [PATCH 3057093]: linux uses libpci for creating useful ifDescr strings

      - [PATCH 3131397]: huge speedups of the TCP/UDP Tables

  libnetsnmp:

      - Removed the older CMU compatibility support

      - The SSH transport is now configurable

  TLS/DTLS support:

      - The SNMP over DTLS transport now properly supports IPv6

      - Introduced new configuration tokens: localCert/peerCert

        (deprecating serverCert, clientCert, defX509ServerPub, defX509ClientPub)

      - Various fixes for the TLS/DTLS transports

  apps:

      - Added a per-variable timed output support to snmpwalk using -CT

      - snmpinform now correctly uses the local engineID for informs

      - A number of mib2c bug fixes

      - New snmp.conf tokens for timeouts and retries

  building:

      - New flags to reduce the amount of compiled code to bare minimums.

        This is provided by a new generic feature marking/selection mechanism.

        http://www.net-snmp.org/wiki/index.php/Feature_Marking_and_Selection

      - It's now possible to build without SNMPv3/USM

        (e.g., if you only want TLS/DTLS with SNMPv3/TSM)

      - It's possible to build the suite with no SET support

        configure using --enable-read-only

      - It's possible to build the agent as a notify-only agent

        configure using --enable-notify-only

      - Added a script to test memory usage with various config options

        (see the local/minimalist/sizetests script)

      - Net-SNMP can now be built to perform local DNSSEC validation

        (install DNSSEC-Tools' libval and use --with-local-dnssec-validation)

  testing:

      - a number of new API unit-tests have been added to the suite

        (to run the tests: cd testing && ./RUNFULLTESTS -g unit-tests)

      - The unit tests can be more easily run under valgrind

        (See http://bit.ly/jsgRnv for details)

  openbsd:

      - Support for updating the routing table via SNMP

  win32:

      - The testing suite works better under win32 environments

      - Many building fixes for the win32 environment(s)

  solaris:

      - Net-SNMP now supports the SCTP-MIB

  DragonFlyBSD, FreeBSD8:

      - Net-SNMP should now work on DragonFlyBSD and FreeBSD8

  And of course:

      - Many other bug fixes.  See the CHANGES and ChangeLog for details.

*5.6*

    all:

      - Implemented the SNMP over TLS and SNMP over DTLS protocols [RFC-to-be]

        See http://www.net-snmp.org/wiki/index.php/TUT:Using_TLS

      - Implemented the "Transport Security Model" [RFC5591]

      - Generic host-specific configuration .conf files are now read.

	See the HOST-SPECIFIC FILES section of the snmp.conf manual page

        and http://www.net-snmp.org/wiki/index.php/Configuration

      - Include statements can now be used in .conf files.

        See http://www.net-snmp.org/wiki/index.php/Configuration

    snmpd:

      - Fix handling of multiple matching VACM entries. (Use the "best"

	match, rather than the first one). Reported by Adam Lewis. Note

	that this could potentially affect the behaviour of existing access

	control configurations.

      - Agent will no longer call table handlers if a set request for the

	handler has invalid indexes

      - table_data/tdata next handler will not be called during get

	processing if no valid rows are found for the handler

      - [PATCH 2952708]: Added Perl implementation of BRIDGE-MIB

      - moved all functions defined in libnetsnmphelpers to

	libnetsnmpagent. libnetsnmphelpers is now an empty library.

      - Implemented the TSM-MIB and the TLSTM-MIB

      - new API for indicating that persistent store needs to be saved

	after the current request finishes processing

      - [PATCH 2931446]: make the load averages writable.

    apps:

      - A new tool 'net-snmp-cert' that easily creates and manages

        X.509 certificates for use with the SNMP over (D)TLS protocols.

      - Added an 'agentxtrap' command to send notifications via AgentX

        (See http://www.net-snmp.org/wiki/index.php/TUT:agentxtrap for details)

      - -T command line flag can be used to pass configuration

        directly to transports that can accept configuration tokens

      - A new 'snmptls' command for manipulating the agent's TLS configuration

    snmplib:

      - A more modular transport subsystem that allows third party

        extensions and dependencies for code reuse.

      - New transport functions: f_config, f_open, f_copy and f_setup_session

      - Transports can now specify session defaults

        - E.G. dtlsudp: auto-sets the SNMP version and the security model.

      - [PATCH 2942940]: Add a new function, netsnmp_parse_args, that is

	like snmp_parse_args but takes an additional bitmask, flags, to

	affect the behaviour. Also remove the magic handling of some

	application names.

      - A new X.509 certificate API for indexing and reading certificates

      - new experimental row creation API which uses a state machine

        to try really hard to create a row from a given varbind list

      - netsnmp_container enhancements:

        - added a free_item function

        - added a CONTAINER_FREE_ALL macro/function

        - added an interface for duplicating a container (CONTAINER_DUP)

        - added a remove function to container_iterators

	- added an ability to set options on binary_array containers

      - new snmp token logOption allows specifying log destinations

        via configuration conf files

      - A very significant reduction in compiler warning output

      - new experimental simple state machine handling API

    building:

      - Support for a stream-line stripped down version of internal

        OpenSSL support using --with-openssl=internal.

      - Do not require that the UDP transport is included.

      - Building Net-SNMP with dmalloc support enabled is again possible.

    mib2c:

      - mib2c can now optionally run sed on generated code

    testing:

      - A brand new test infrastructure supporting multiple test suites

        See perldoc testing/RUNFULLTESTS for details

    python:

      - walking broken agents won't cause an infinite loop

    win32:

      - IPv6 is only supported under Cygwin 1.7 or later.

      - [BUG 2939168]: byte order of udpLocalPort is now correct.

      - [BUG 2939168]: fixed test infrastructure ("make test"). This has

	been fixed by using the proper environment separator character and

	by adding the path of the netstat executable for Cygwin in

	testing/TESTCONF.sh.

      - building with another OpenSSL package than the Cygwin-provided

	packages openssl and openssl-devel is again possible.

      - running the regression test suite is again possible ('make test').

      - winExtDLL compiles now under MinGW.

      - the snmpd.conf keyword 'extend' is now supported under MinGW

      - the snmptrapd.conf keyword traphandle is now supported under MinGW

    qnx6:

      - [PATCH 2836895]: support for QNX6

*5.5*

    All applications:

      - Added the ability to "alias" transports to a more simple name

         (see the "alias" keyword in the snmp.conf manual page)

      - The -t (timeout) switch will accept floating point numbers (eg: .1)

    snmpd:

      - [BUG 1712988]: default/configurable max # varbinds returned by GETBULK

      - [PATCH 1585146]: Extend range of available error codes

      - [PATCH 1654424]: Handle row deletion issues in dataset tables

      - [PATCH 1666737]: Include IPv6 traffic in various UDP counters

      - [PATCH 1700157]: Fix ordering of exec tokens in MIB output

      - [PATCH 1719253]: fix skipNFSInHostResources for multiple walks

      - [PATCH 1723611]: New implementation of the RMON alarmTable

      - [PATCH 1737439]: automatic link up/down traps on a walk

      - [PATCH 1806501]: Add API for sending traps with a snmpv3 context

      - [PATCH 1882621]: Add LVM support to the partition table

      - [PATCH 1893468]: fixed registration of OIDs with ranges

      - [PATCH 1901764]: Support date-based logwatch files

      - [PATCH 1909813]: fix table_iterator handling of SORTED hint

      - [PATCH 1916840]: new config option to set SNMPv1 trap agent address

      - [PATCH 2103492]: implement RMON-MIB::etherStatsJabbers

      - [PATCH 2449210]: add 64-bit usage statistics to UCD-SNMP-MIB::dskTable

      - Add support for a user provided length variable

	   and C string values to the watcher helper.

      - Automatically reregister sysORTable entries from AgentX subagents.

      - Fix various memory leaks

      - Implement ipAddressSpinLock

      - Implement ipNetToPhysicalLastUpdated

      - Suppress annoying "registration != duplicate" warning for root oids

    snmptrapd:

      - [PATCH 1908288]: Run perl END block on termination

      - Add trap handler for logging traps to a mysql database

      - Withdraw deprecated options.

    snmpnetstat:

      - [PATCH 2564538]: Support GETBULK in v2c+ snmp versions

    snmpusm:

      - [PATCH 1591355]: Allow cloning to arbitrary engineIDs

    snmplib:

      - [BUG 1619827]: Improve handling of link dependencies

      - [PATCH  700681]: limited support for UDPv4 broadcast addresses

      - [PATCH 1882069]: Add token for specifying an exact SNMPv3 engineID

      - Fix assorted memory leaks

      - Implemented RFC5343 contextEngineID probing.

      - Support for the TSM security model for use with tunneling

    misc:

      - Add config reread support to "net-snmp-config --compile-subagent" code

      - Preliminary (alpha) support for SNMP over SSH and DTLS/UDP.

      - Preliminary (alpha) support for the TSM security model

      - Separate user management into new net-snmp-create-v3-user script

    building:

      - Improved cross-compilation support

      - Improved library layering & dependency handling when linking apps

      - Improved RPM spec files, for consistency with vendor-provided packages.

      - Mechanism for selecting build environment based on version

      - New test scripts to test Net-SNMP transport functionality

      - Restructure configure template

      - Update to autoconf 2.63 & libtool 2.2.6

    perl:

      - [BUG 1619827]: improve handling of link dependencies

      - [PATCH 1956193]: beta threadable perl module code for SNMPv1/2c usage.

    python:

      - [PATCH 1716114]: Let python build in source tree (Debian patch #38)

    Linux:

      - [PATCH 1704105]: Add IPv6 support to the inetNetToMediaTable

      - [PATCH 1705594]: Various fixes to ipAddressPrefixTable reporting

      - [PATCH 1708243]: Implement ipDefaultRouteTable

      - [PATCH 1715405]: Implement ipv6ScopeZoneIndexTable

      - [PATCH 1724602]: MfD-based ipDefaultRouterTable implementation

      - [PATCH 1828602]: Support ipDefaultTTL and ipForwarding SETs

      - [PATCH 1927751]: Implement icmpMsgStatsTable

      - [PATCH 2023633]: Implement SCTP-MIB

      - [PATCH 2053273]: Implement EtherLike MIB

    AIX:

      - Add support for AIX 6.x

      - Fix default shared library building instead of forcing static

    FreeBSD:

      - [BUG 1633483]: Support CPU HAL on FreeBSD4.x

      - [PATCH 1623874]: add GNU/kFreeBSD support

    IRIX:

      - [PATCH 1709748]: Optimized IRIX cpu stats

      - [PATCH 1675869]: CPU statistics for IRIX based on PCP

    MacOSX:

      - [PATCH 1600522]: CPU HAL implementation for mach/darwin

    Solaris:

      - [PATCH 1719730]: support for ipSystemStatsTable and ipAddressTable

    Win32:

      - [PATCH 2686248]: Fix several winExtDLL bugs.

      - [PATCH 1706344]: Fix compilation with cygwin

      - Fix AES support

*5.4*

  Important Changes:

    - The default configuration now enables embedded Perl and the Perl

      modules by default when possible unless explicitly disabled. You

      may use the --disable-embedded-perl and --without-perl-modules

      configure options, respectively, to revert to the former default

      configuration.

  New:

    python:

      - Python bindings to the Net-SNMP project are now available in

        the python sub-directory.  See the README file there for details. 

    build:

      - Some preliminary support for automatic building of dynamically

        loadable mib module code.

      - Most net-snmp specific defines are now (also) available under

        a proper NETSNMP_ prefix. The older, potentially conflicting

        names as well as the autoconf variables can now be turned off

        easily within 3rd party code.

      - libtool update to 1.5.22

      - enable-as-needed will try to link built libraries against needed

	libraries at library link time, rather than application link time.

        This is preliminary support for what will likely be better in 5.5.

    snmplib:

      - [PATCH 1282566]: to rework transport creation to allow for

        alternative interpretations of the address and a more flexible

        transport registration system

      - [PATCH 1509943]: responses will get sent from the original dest IP

        address when possible.

    snmpd:

      - new MIB table for managing Net-SNMP access control extensions

        (see NET-SNMP-VACM-MIB).  These extensions to the VACM MIB are

        Net-SNMP specific and are used primarily by snmptrapd at this point.

      - [PATCH 1550725]: A new uint instance helper to match the existing

        int, long and ulong helpers

      - [PATCH 1534877]: to add support for skipping NFS entries in the

        host resources hrStorageTable.	See the skipNFSInHostResources

        token in the snmpd.conf file for details.

      - A "hardware abstraction layer", to localise the O/S-specific

        aspects of retrieving system data.  This first appeared in the

        5.3.x line, but this release now starts to actively use it for

        implementing particular MIB modules.

        This has resulted in some minor changes in behaviour - some index

        values in the hrStorageTable have changed from earlier releases,

        and the (non-raw) memory statistics are now consistent, reporting

        percentage usage calculated over the last minute on _all_ systems.

      - Agent builds default module list from a default_mibs.h rather than

        a hard coded configure list

      - [PATCH 1568150]: Extend pass_persist error messages that can be

	passed back from the script

      - [PATCH 1570982]: Solaris IF-MIB: Support for IPv6-only interfaces

    snmptrapd:

      - the traphandle directive now supports a -t switch to indicate

        matching any OID in the tree below the specified OID

    mib2c:

      - New mib2c.emulation.conf provides a quick way to do simplistic

        emulation of an entire MIB or MIB branch.

      - A new perl module NetSNMP::agent::Support provides easier embedded 

        perl support. (patch 1369996 from Peter Martin)

        Run "mib2c -c mib2c.perl.conf OID" to help you start using it.

    perl:

      - gettable() now supports asynchronous callback functions

      - update default_store module to latest default_store c-binding

	tokens

    snmpusm:

      - performance improvement when changing localized keys

      - new option -Cp to set usmUserPublic value

    snmpvacm:

      - new commands to manipulate Net-SNMP access control extensions

 Ports:

   Linux:

      - add IPv6 aware UDP and TCP mibs to default module list

   Solaris, FreeBSD, OpenBSD:

      - Experimental support for 64bit interface counters (ifXTable). Enable

        via '--with-mib-modules=if-mib --enable-mfd-rewrites'.

      - [PATCH 1569537,1569539]: new UDP-MIB and TCP-MIB implementation

	(enable through --with-mib-modules=udp-mib,tcp-mib)

   Win32:

      - new winExtDLL extension module to allow snmpd to load Windows SNMP

        Service extension DLLs to provide support for HOST-RESOURCES-MIB

        and other MIBs provided with Windows.

   AIX:

      - HOST-RESOURCES-MIB implementation added to default module list

   uCLinux

      - [PATCH 1551948]: Make pass_persist usable on uClinux

  Fixes:

    snmplib:

      - fix OID lookups for fully qualified object names (eg .iso.org)

        (official patch 1421725)

      - UDPIPv6 and TCPIPv6 transports now compile on recent UN*X platforms

    snmpd:

      - fix disman/event monitoring crashes (official patch 1429059)

      - fix re-init of daemons after SIGHUP (official patch 1473289)

      - fix trap processing from SMUX peers (patch 1430824)

      - [BUG 1527930]: fix smux authentication

      - [BUG 1427410]: Set auth engineID for SNMPv3 traps.

      - [BUG 1535903]: Support spaces within security names

      - fix 8 byte IpAddress in at, ip and route MIBs.

      - [PATCH 1562688]: fix ping/reattach agentx code

    snmptrapd:

      - fix bug 1420758/1458815: snmptrapd aborts/loops in select()

        (official patch 1420758)

      - fix re-init of daemons after SIGHUP (official patch 1473289)

    perl:

      - Fixed the perl bulkwalk function

      - gettable() was fairly broken in prior versions 

      - OID handling was fully broken on various 64bit platforms

      - fixes for 64-bit platforms

    misc:

      - Many misc fixes

*5.3.0.1*

  *** Security Fix ***

    - In version 5.3 much of the authorization control was rewritten.

      There was a bug in the new code that resulted in granting write

      access to read-only users or communities which were configured

      using the "rocommunity" or "rouser" snmpd.conf tokens.  5.3.0.1

      fixes this problem.  Users are encouraged to immediately update

      their installations if they use either of these tokens.

*5.3*

 *** Important Notes ***

    Several very significant changes have been made in Net-SNMP for this

    release that warrant special attention.

    - shared library version number no longer matches the release number. We

      now follow the versioning scheme recommended by libtool. For the 5.3

      release this means that the libraries now have a SONAME ending with

      ".so.10", e.g. libnetsnmp.so.10.

    - snmpd has not been truncating log files at startup, as documented in

      the man pages, for a while now. This default behaviour has been restored.

      Please use the '-A' flag if you want to continue appending to your log

      files at startup.

    - snmptrapd will no longer accept all traps by default. It must be

      configured with authorized SNMPv1/v2c community strings and/or SNMPv3

      users. Non-authorized traps/informs will be dropped.

    - Due to a copyright statement that didn't allow modifications, 

      snmpnetstat has been completely rewritten.  The new version now

      accepts the same command-line options as the other tools, which

      has introduced a number of incompatible changes.  However, it

      does now finally support SNMPv3.

 New:

    Building:

      - new option to disable set support in the agent (--disable-set-support)

   snmpd:

     - implement notification logging

     - implement notification filtering

     - AgentX, host resources and disman/event mibs added to default module list

     - updated and new disman mib implementations

   snmptrapd:

     - allow a non-default AgentX socket

     - a brand new authorization scheme that is based on the VACM

       authorization scheme from snmpd.

       - Note: now drops unauthenticated notifications by default

     - registers the snmpEngine MIB group under the "snmptrapd" context

   snmplib:

     - new helper for ascii file based scalar integers (think Linux /proc/)

     - new utilities for dealing with files

     - new utilities for parsing text files

     - granular config/persistent file disablement (noPersistentLoad and

       noPersistentSave snmp.conf tokens)

    mib2c:

      - mib2c.mfd.conf now generates code for persistence row storage

      - many enhancements and bug fixes

    snmpusm:

      - allows to use old and/or new localized key instead of passphrase with

        option -Ck

      - new option -CE to specify usmUserEngineID (necessary to manage

        snmptrapd's usmUserTable)

 Ports:

   Linux:

       - new experimental tables

         - tcpConnectionTable, tcpListenerTable

         - ipAddressPrefixTable

         - udpEndpointTable

         - ipv4InterfaceTable, ipv6InterfaceTable

       - inetCidrRouteTable supports dynamic ipv4 route creation/deletion

       - added ipv6IpForwarding.0 and ipv6IpDefaultHopLimit.0 (read-write)

   Win32:

     - Cygwin compiler fixes

     - MSVC: agent (snmpd) support for pass and pass_persist

     - MinGW: agent (snmpd) support for pass

     - Fix for 'select: No such file or directory' in snmpdelta

 Fixes:

   - Persistent files in directory defined by snmp.conf persistentDir were 

     not being loaded at startup

   - Perl getnext didn't honor explicit reference to MIB file

   - AgentX sub-agent connection delayed til after config files read

   - Build fixes for --disable-agent, --disable-snmpv1 and --disable-snmpv2c

   - Lots of bug fixes

*5.2*

 New:

    For the security paranoid (like Wes):

      - Insecure versions of SNMP may be completely disabled at compile time.

          (configure using one or both of --disable-snmpv1 --disable-snmpv2c)

      - Less secure versions of SNMPv3 authentication and encryption

          algorithms may be completely disabled at compile time.

          (configure using one or both of --disable-des --disable-md5)

          (This requires you have OpenSSL to support SHA1 and AES instead)

      - Diffie-Helman key negotiation (perfect-forward-secrecy - RFC2786)

          has been implemented in both the agent and "snmpusm".

      - Better support for direct use of localized and master keys

        (randomly generated keys have more entropy than passwords). See

        the -3m -3M -3k and -3K options, and the defAuthLocalizedKey,

        defPrivLocalizedKey, defAuthMasterKey, defPrivMasterKey

        snmp.conf tokens)

    library:

      - send and receive buffer sizes for UDP/TCP are configurable

      - .conf file token registration can now search multiple files

        (separate file names to search by a :.  IE, "snmpd:agentx")

    snmptrapd:

      - Embedded perl support for trap handlers (much faster than traphandles).

          (configure --with-embedded-perl ; see 'perldoc NetSNMP::TrapReceiver')

      - the snmptrapd usmUser table can be controlled through SNMP & AgentX

          (the snmptrapd registers MIBs under the "snmptrapd" SNMPv3 context)

    agent:

      - community strings can be mapped to individual SNMPv3 contexts

          (see the snmpd.conf manual on "com2sec").

      - AgentX should work properly with SNMPv3 contexts now.

      - improved version of "exec" extension directive - "extend":

          supports multi-line output, configurable command input, SET

          handling, a valid relocatable MIB output structure, etc

      - more flexibility added to netsnmp_cache helper, including periodic

          refreshing of caches and cache pre-loading.

      - experimental implementation of DisMan Remote Operations MIB groups

        (remote nslookup, ping, traceroute and expressions via SNMP)

      - The proxy supports a new -Cc flag which passes the community

        name through to the other side rather than hard-coding it.

      - The config_require() and other modules can now be placed

        inside of CPP directievs (#if, /* ... */) as header files are

        now passed through CPP processing first.

      - new config_exclude() macro for excluding certain modules

      - new config_belongs_in() macro to specify if a chunk of code

        found by --with-mib-modules belongs in the agent library or

        the mib module library.

      - Uses a smaller function stack.

    commands:

      - snmpusm: A number of key-change improvements

        (EG, changing localized keys supported, diffie-helman support, ...)

      - New -Ln option to completely disable logging.

    mib2c:

      - a number of new or updated configuration templates:

        - mib2c.iterate.conf: the iterator-based table config

            now produces fuller template code than before.

        - mib2c.table_data.conf and mib2c.container.conf:

            two new "internal-row" style configs

        - mib2c.mfd.conf: "MIBs for Dummies" (or MFD) - intended to

            reduce the SNMP knowledge needed to develop MIB modules

            and add flexibility at the same time.  Run "mib2c -S

            mfd_interactive_setup=1 -c mib2c.mfd.conf OID" and follow

            its guided instructions to help you tailor its results to

            meet your needs.

        - mib2c.genhtml.conf: Generates an easier-to-read HTML view of

          a MIB tree structure.  (See http://www.Net-SNMP.org/mibs/

          for example output.)

      - more node tags available for conf file writers

      - additional search directories may be set via MIB2C_DIRS env var.

      - mib2c-update: new utility to help update mib2c generated code

          when conf file changes.

      - a mib2c.conf manual page to describe how to write mib2c .conf files.

      - support for embedded perl code in mib2c.conf files

    documentation:

      - New README.agent-mibs: an attempt to start documenting what

          MIBs are implemented in the agent and on what architectures.

    perl:

      - An improved SNMP::gettable() method.  Uses GETBULK if possible and

        better GETNEXT requests if not, decodes indexes from OIDs,

        requests multiple variables at once, ...  ("perldoc SNMP" for details)

      - A NetSNMP::OID::get_indexes() function to extract index values

        from an OID.

 Ports:

   Linux:

     - new experimental tables/rewrites for Linux, including:

           ifTable, ifXTable, inetCidrRouteTable, ipCidrRouteTable,

           ipAddressTable, ipSystemStatsTable, ipNetToPhysicalTable.

       - Enable these talbles by specifying --enable-mfd-rewrites to configure.

       - Most of these tables have IPv6 support as well.

     - ifIndex no longer changes when interfaces are added/removed, and all

         tables/object will now use the same ifIndex for the same interface.

   Solaris:

     - new experimental support for ucd-snmp/lmSensors MIB module

   Win32:

     - Support for the MinGW compiler

     - Support for snmptrapd running as a service

     - A Win32 specific build and install script

     - Support for a .exe installer

       (we'll make binaries available using it)

 Fixes:

   - AgentX memory leak on sets

   - SNMPv3 not-in-time window after 248 days

   - Agent hang in HOST-RESOURCES MIB

   - double free on duplicate registration

   - OIDs with IP Addresses as indexes now print prettier

   -'Lazy' installation of headers (only install if newer)

   - allow whitespace in rocommunity/rwcommunity

   - many miscellaneous bug reports

*5.1.2*

 New:

   - Minor improvements to snmpdelta (error reporting)

   - Minor improvements to snmpnetstat (IPv6 output)

 Fixes:

   - Misc 64bit processor fixes.

   - Misc perl build and install fixes.

 Ports:

   - Linux 2.6 improvements

   - Win32 support for TCP and UDP over IPv6 via Winsock version 2

   - Win32 fixes in many places.

   - Win32 service support for snmptrapd

   - Win32 support for snmpconf

*5.1.1*

 New:

   - test suite supports testing over other transports (tcp, udp6, unix, ...)

     (see the -P switch to the testing/RUNTESTS script)

   - Solaris supports the use of it's PKCS#11 library for supporting

     cryptographic functions (OpenSSL isn't required if PKCS#11 is available)

     (see configure's --with-pkcs flag)

 Fixes:

   - Improvements on 64 bit architectures.

   - A few minor memory leaks fixed.

   - An extremely large number of minor bug fixes.

   - Many perl module specific bug fixes.

   - snmpd will safely handle more signals.

 Ports:

   - Many many significant Windows improvements.

     - AgentX support is working again under windows.

     - SCM support is built into the agent to allow the agent to be

       started as a windows service.

     - MSDOS names are supported in path names.

     - A win32 build script in win32/build.pl

     - Support for the MinGW compiler

     - (see the README.win32 file for details on new ports)

     - Various helpful win32/*.bat files for installation, etc.

   - Some linux 2.6 support improvements

*5.1*

 New:

    Building:

      - configure is now generated using autoconf 2.57.

      - The make system now supports "make uninstall"

      - configure & make supports a --with-install-prefix option

      - new configure options to disable building of the agent, apps, ...

        ./configure --help for a list of package sections that can be excluded.

      - new configure option to remove specific code pieces (mib reading, ...)

        ./configure --help for a list of code areas that can be excluded.

    snmpd:

      - linkUp and linkDown notifications can be enabled

        (see the linkUpDownNotifications snmpd.conf token documentation)

      - notifications (traps) can be generated for disman/monitor events.

        (see the snmpd.conf documentation on "monitor" and "notificatonEvent")

      - new snmpd.conf tokens:  includeAllDisks

      - the UCD-DISKIO-MIB will now work on linux.

      - com2sec mappings for SNMP over unix sockets.

      - some speed improvements have been made that should increase the

        speed of the agent's processing time.

      - for mib code using the table iterator, an auto-caching mechanism

        which can greatly speed up access at the cost of caching.

        (see "stash_cache" in the injectHandler token docs in snmpd.conf(5))

      - Some of the agent modules were completely rewritten (and

        should be faster and cleaner).

      - A number of new APIs and helper modules are available, but

        there is no major summary to easily list.

      - A number of new Net-SNMP specific MIBs now exist.

    snmptrapd:

      - snmptrapd now supports forwarding of notifications.

        (see the snmptrapd.conf manual for details)

      - snmptrapd's new -t switch can be used to disable syslog.

        (useful for a no-output snmptrapd with only traphandle support)

    apps:

      - snmptable sports 3 new options: fixed width, max-repeaters,

        left-justify.  (see snmptable -h for details)

      - mib2c walks you through instructions to help you generate code

        "just for you".  Including some new forms of output code, like

        notification code generation.  Run mib2c SOMETHING for details.

      - mib2c has about a billion other improvements, including the

        ability to generate trap generation code templates.

      - snmpwalk supports a new -Ct option for timing how long a walk takes.

      - net-snmp-config supports a number of new options.

      - All applications support a consistent -L flag for turning on

        which forms of output logging should be used.

    perl:

      - the SNMP module supports a new get_table() call.

 Fixes:

    - More patches to properly demonize snmpd (close std*, double fork, ...).

    - Version numbers of all packages/perl-modules/etc are better synchronized.

    - more documentation, especially for APIs

    - all perl module version numbers are synchronized with the

      net-snmp package.

    - Many many misc bug fixes, as always.

 Ports:

    - diskio MIB support for Darwin.

    - ifSpeed under Linux should now be correct for most network cards.

    - more windows build fixes

*5.0.9*

 SECURITY:

    - An existing user/community could get access to data in MIB

      objects that were explicitly excluded from their view.

 Fixes:

    - Perl build environment should better under Windows

    - Misc kerberos support fixes.

    - Improvements on various manual pages.

    - A annoying bug with SETs being passed to pass scripts was fixed.

    - The often talked about VACM optimization improvement was fixed again.

    - mib2c handles augmentation tables better now.

    - Various 64 bit issues have been addressed.

*5.0.8*

 New:

    - No new features will be added to the 5.0.x line.

 Ports:

    - Update libtool to version 1.4.3, for the benefit of Darwin

    - diskio support for Darwin

    - Updates for OpenBSD 3. 

    - Updates to solaris README

 Fixes:

    - find libwrap w/nsl on RedHat

    - fix for openssl 0.9.7

    - Fix some AgentX memory leaks

    - use macro for inline function prototypes

    - Attempt to find unused port before running tests

    - Use SNMP_SLEEP environment variable when running tests

    - calculate a proper ifSpeed under linux when possible

    - better daemonization of snmpd

    - close and reopen snmptrapd log files on HUP