161 lines
5.9 KiB
Markdown
161 lines
5.9 KiB
Markdown
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SNMP library for Python
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-----------------------
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[](https://pypi.org/project/pysnmp/)
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[](https://pypi.org/project/pysnmp/)
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[](https://secure.travis-ci.org/etingof/pysnmp)
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[](https://raw.githubusercontent.com/etingof/pysnmp/master/LICENSE.rst)
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This is a pure-Python, open source and free implementation of v1/v2c/v3
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SNMP engine distributed under 2-clause [BSD license](http://snmplabs.com/pysnmp/license.html).
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The PySNMP project was initially sponsored by a [PSF](http://www.python.org/psf/) grant.
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Thank you!
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Features
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--------
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* Complete SNMPv1/v2c and SNMPv3 support
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* SMI framework for resolving MIB information and implementing SMI
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Managed Objects
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* Complete SNMP entity implementation
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* USM Extended Security Options support (3DES, 192/256-bit AES encryption)
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* Extensible network transports framework (UDP/IPv4, UDP/IPv6)
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* Asynchronous socket-based IO API support
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* [Twisted](http://twistedmatrix.com), [Asyncio](https://docs.python.org/3/library/asyncio.html)
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and [Trollius](http://trollius.readthedocs.org/index.html) integration
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* [PySMI](http://snmplabs.com/pysmi/) integration for dynamic MIB compilation
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* Built-in instrumentation exposing protocol engine operations
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* Python eggs and py2exe friendly
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* 100% Python, works with Python 2.4 though 3.7
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* MT-safe (if SnmpEngine is thread-local)
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Features, specific to SNMPv3 model include:
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* USM authentication (MD5/SHA-1/SHA-2) and privacy (DES/AES) protocols (RFC3414, RFC7860)
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* View-based access control to use with any SNMP model (RFC3415)
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* Built-in SNMP proxy PDU converter for building multi-lingual
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SNMP entities (RFC2576)
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* Remote SNMP engine configuration
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* Optional SNMP engine discovery
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* Shipped with standard SNMP applications (RC3413)
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Download & Install
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------------------
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The PySNMP software is freely available for download from [PyPI](https://pypi.org/project/pysnmp/)
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and [GitHub](https://github.com/etingof/pysnmp.git).
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Just run:
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```bash
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$ pip install pysnmp
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```
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to download and install PySNMP along with its dependencies:
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* [PyASN1](http://snmplabs.com/pyasn1/)
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* [PySMI](http://snmplabs.com/pysmi/) (required for MIB services only)
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* Optional [pysnmpcrypto](https://github.com/etingof/pysnmpcrypto) package
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whenever strong SNMPv3 encryption is desired
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Besides the library, command-line [SNMP utilities](https://github.com/etingof/snmpclitools)
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written in pure-Python could be installed via:
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```bash
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$ pip install snmpclitools
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```
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and used in the very similar manner as conventional Net-SNMP tools:
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```bash
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$ snmpget.py -v3 -l authPriv -u usr-md5-des -A authkey1 -X privkey1 demo.snmplabs.com sysDescr.0
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SNMPv2-MIB::sysDescr.0 = STRING: Linux zeus 4.8.6.5-smp #2 SMP Sun Nov 13 14:58:11 CDT 2016 i686
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```
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Examples
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--------
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PySNMP is designed in a layered fashion. Top-level and easiest to use API is known as
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*hlapi*. Here's a quick example on how to SNMP GET:
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```python
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from pysnmp.hlapi import *
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iterator = getCmd(SnmpEngine(),
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CommunityData('public'),
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UdpTransportTarget(('demo.snmplabs.com', 161)),
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ContextData(),
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ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)))
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errorIndication, errorStatus, errorIndex, varBinds = next(iterator)
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if errorIndication: # SNMP engine errors
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print(errorIndication)
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else:
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if errorStatus: # SNMP agent errors
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print('%s at %s' % (errorStatus.prettyPrint(), varBinds[int(errorIndex)-1] if errorIndex else '?'))
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else:
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for varBind in varBinds: # SNMP response contents
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print(' = '.join([x.prettyPrint() for x in varBind]))
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```
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This is how to send SNMP TRAP:
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```python
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from pysnmp.hlapi import *
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errorIndication, errorStatus, errorIndex, varBinds = next(
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sendNotification(
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SnmpEngine(OctetString(hexValue='8000000001020304')),
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UsmUserData('usr-sha-aes128', 'authkey1', 'privkey1',
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authProtocol=usmHMACSHAAuthProtocol,
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privProtocol=usmAesCfb128Protocol),
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UdpTransportTarget(('demo.snmplabs.com', 162)),
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ContextData(),
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'trap',
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NotificationType(ObjectIdentity('SNMPv2-MIB', 'authenticationFailure'))
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)
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)
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if errorIndication:
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print(errorIndication)
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```
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We maintain publicly available SNMP Agent and TRAP sink at
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[demo.snmplabs.com](http://snmplabs.com/snmpsim/public-snmp-agent-simulator.html). You are
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welcome to use it while experimenting with whatever SNMP software you deal with.
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```bash
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$ python3 examples/hlapi/asyncore/sync/manager/cmdgen/usm-sha-aes128.py
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SNMPv2-MIB::sysDescr.0 = SunOS zeus.snmplabs.com 4.1.3_U1 1 sun4m
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$
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$ python3 examples//hlapi/asyncore/sync/agent/ntforg/v3-inform.py
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SNMPv2-MIB::sysUpTime.0 = 0
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SNMPv2-MIB::snmpTrapOID.0 = SNMPv2-MIB::warmStart
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SNMPv2-MIB::sysName.0 = system name
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```
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Other than that, PySNMP is capable to automatically fetch and use required MIBs from HTTP, FTP sites
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or local directories. You could configure any MIB source available to you (including
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[this one](http://mibs.snmplabs.com/asn1/)) for that purpose.
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For more example scripts please refer to [examples section](http://snmplabs.com/pysnmp/examples/contents.html#high-level-snmp)
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at pysnmp web site.
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Documentation
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-------------
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Library documentation and examples can be found at the [pysnmp project site](http://snmplabs.com/pysnmp/).
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If something does not work as expected, please
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[open an issue](https://github.com/etingof/pysnmp/issues) at GitHub or
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post your question [on Stack Overflow](http://stackoverflow.com/questions/ask)
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or try browsing pysnmp
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[mailing list archives](https://sourceforge.net/p/pysnmp/mailman/pysnmp-users/).
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Bug reports and PRs are appreciated! ;-)
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Copyright (c) 2005-2018, [Ilya Etingof](mailto:etingof@gmail.com). All rights reserved.
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