Free snmp software for linux

bsnmp is a miniSNMP daemon. For a couple of projects that involved controlling software on a couple of machines from a single controlling machine I decided to use SNMP. After looking at several available SNMP implementations I started to implement my own SNMP stuff, because what was available was not really what I needed (for several reasons). The result of this work is bsnmp.

bsnmp consists of the following pieces:
a library libbsnmp that includes ASN.1 handling, the SNMP protocol version V1 and V2C and a number of helper stuff to simplify writing of SNMP agents and clients.
the gensnmptree tool that generates the C- and H-files from an object hierarchy description (.def file).
the gensnmpdef tool that generates an initial .def file from a MIB. This requires the libsmi library.
bsnmpd - the SNMP daemon.
snmp_mibII - an implementation of the standard MIB-II sub-tree.
snmp_ntp - a partial implementation of the experimental NTP MIB.

The bsnmpd daemon implements just the bare minimum that is needed for such a daemon: the system group, parts of the SNMP group and a private tree that does the following:

handling of loadable modules. This allows loading/unloading parts of the tree at runtime or configuration time.
handling of communities. A table that allows loaded modules to create new communities at run-time (ILMI is a consumer of this). This table can be disabled for obvious reasons.
handling trap destinations for V1.
several configuration parameters like the protocol versions to handle, buffer sizes and so on.
tables that manage the UDP and local unix ports the daemon is listening on.
statistics and debugging
All real functionality is implemented via loadable modules and hence the daemon can be used for remote-control functions that have nothing to do with network management.

SNMP::Util contains Snmp modules to perform snmp set, get, walk, next, walk_hash etc.
SYNOPSIS
use SNMP::Util;
## Documentation (POD) =head1 NAME
Perl SNMP utilities - SNMP::Util - Version 1.8
This Perl library is a set of utilities for configuring and monitoring SNMP based devices. This library requires the UCD port of SNMP and the SNMP.pm module writted by Joe Marzot.
Enhancements:
- Includes patches from tyoshida

Mon::SNMP is a Perl module created to decode SNMP trap.

SYNOPSIS

use Mon::SNMP;

$trap = new Mon::SNMP;

$trap->buffer($snmptrap);

%traphash = $trap->decode;

$error = $trap->error;

Mon::SNMP provides methods to decode SNMP trap PDUs. It is based on Graham Barrs Convert::BER module, and its purpose is to provide SNMP trap handling to "mon".

METHODS

new

creates a new Mon::SNMP object.

buffer ( buffer )

Assigns a raw SNMP trap message to the object.

decode

Decodes a SNMP trap message, and returns a hash of the variable assignments for the SNMP header and trap protocol data unit of the associated message. The hash consists of the following members:

version => SNMP version (1)
community => community string
ent_OID => enterprise OID of originating agent
agentaddr => IP address of originating agent
generic_trap => /COLDSTART|WARMSTART|LINKDOWN|LINKUP|AUTHFAIL|EGPNEIGHBORLOSS|ENTERPRISESPECIFIC/
specific_trap => specific trap type (integer)
timeticks => timeticks (integer)
varbindlist => { oid1 => value, oid2 => value, ... }

Net-SNMP project provides tools and libraries relating to the Simple Network Management Protocol.

Installation:

The `configure shell script attempts to guess correct values for various system-dependent variables used during compilation.

It uses those values to create a `Makefile in each directory of the package. It may also create one or more `.h files containing system-dependent definitions.

Finally, it creates a shell script `config.status that you can run in the future to recreate the current configuration, a file `config.cache that saves the results of its tests to speed up
reconfiguring, and a file `config.log containing compiler output (useful mainly for debugging `configure).

If you need to do unusual things to compile the package, please try to figure out how `configure could check whether to do them, and mail diffs or instructions to the address given in the `README so they can be considered for the next release.

If at some point `config.cache contains results you dont want to keep, you may remove or edit it.

The file `configure.in is used to create `configure by a program called `autoconf. You only need `configure.in if you want to change it or regenerate `configure using a newer version of `autoconf.

The simplest way to compile this package is:

1. `cd to the directory containing the packages source code and type `./configure to configure the package for your system.

If youre using `csh on an old version of System V, you might need to type `sh ./configure instead to prevent `csh from trying to execute
`configure itself.

Running `configure takes awhile. While running, it prints some messages telling which features it is checking for.

2. Type `make to compile the package.

3. Optionally, type `make check to run any self-tests that come with the package.

4. Type `make install to install the programs and any data files and documentation.

5. You can remove the program binaries and object files from the source code directory by typing `make clean. To also remove the files that `configure created (so you can compile the package for a different kind of computer), type `make distclean.

There is also a `make maintainer-clean target, but that is intended mainly for the packages developers. If you use it, you may have to get all sorts of other programs in order to regenerate files that came with the distribution.

Whats New in This Release:

snmplib:
- [BUG 1619827]: link libraries against needed external libraries
- [PATCH 1616912]: fix memory leak in UDP transport code
- [PATCH 1592706]: fix memory leak when cloning varbinds
- Change snmp_sess_add_ex to consistently close and delete the
transport argument on failure, earlier the liveness of the
transport argument was undecided.

snmpd:
- [BUG 1558823]: fix ipAddressTable memory leak
- [BUG 1596638]: fix memory leak in ipCidrRouteTable, inetCidrRouteTable
- [BUG 1611524]: fix tcp connection table file descriptor leak
- handle row deletion issues in dataset tables
- [BUG 1712988]: default and configurable maximum number of
varbinds returnable to a GETBULK request.
- [PATCH 1666737]: include ipv6 counts in
udpInDatagrams, udpNoPorts, udpInErrors, udpOutDatagrams
- [PATCH 1700157]: fixes ordering of exec tokens in the resulting mib tree
- [PATCH 1719253]: fix skipNFSInHostResources so it does not break on the
second walk of the table.

perl:
- link Perl modules against the exact set of libraries needed
- [BUG 1619827]: properly link against libperl when configured with
--enable-as-needed
- [PATCH 1725049]: fix bulkwalk in cases of non-repeater

build:
- update to libtool 1.5.24 (from 1.5.22)

python:
- [PATCH 1716114]: Let python build in the Net-SNMP source tree

MacOSX:
- [PATCH 1600522]: CPU Hardware Abstraction Layer (HAL)
implementation for mach/darwin
- IF-MIB rewrite now enabled by default

Win32:
- fix AES support
- [PATCH 1706344]: fix compilation with cygwin

IRIX:
- [PATCH 1709748]: Optimized IRIX cpu stats

AIX:
- Fix default shared library building instead of forcing static use

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

Snmpstat shows router interface information and statistics through web interface using SNMP protocol.

Tested on Linux/Apache for CISCO routers, Route Lynx RL-2000 routers.

SNMP-Check project gets Host/Router information via snmp and displays it.

SNMP::Persist is a Perl module for the SNMP pass_persist threaded backend.

SYNOPSIS

use SNMP::Persist qw(&define_oid &start_persister &define_subtree);
use strict;
use warnings;


#define base oid to host the subtree
define_oid(".1.3.6.1.4.1.2021.248");

#start the thread serving answers
start_persister();

#set first application number

#loop forever to update the values
while(1) {

my %subtree;
my $gameName;
my $index=1; #set first application number

foreach $gameName ("game1", "game2") { #for each application
$subtree{"1." . $index}=["INTEGER",$index]; #set game index data pair
$subtree{"2." . $index}=["STRING",$gameName]; #set game name data pair
$subtree{"3." . $index}=["Counter32", 344.2 ]; #set total memory data pair
$index++; #next application
}

#new values have arrived - notify the subtree controller
define_subtree(%subtree);

#dont update for next 5 minutes
sleep(300);
}

Apache SNMP Module allows you to monitor different configuration and status values of the Apache Web server using SNMP.
Enhancements:
- Bugfixes, the inclusion of MRTG scripts, and changes to make the module work on the IBM HTTP Server.