README.snmpv3
上传用户:wxp200602
上传日期:2007-10-30
资源大小:4028k
文件大小:4k
- README.snmpv3
- -------------
- How to setup SNMPv3, a very brief document for Dave to elaborate and
- do a better job on since I suck at writing documentation and he
- doesn't ;-) --Wes:
- Note: SHA authentication and DES encryption support is only available
- if you have OpenSSL installed.
- Note: encryption support isn't enabled in the binary releases downloadable
- from the net-snmp web site.
- Note: this description assumes you're using the software compiled from
- source, and so installed using the default prefix location (/usr/local).
- If you're working with a vendor-provided system, or have configured
- things with a different prefix, you'll need to adjust locations accordingly.
- CREATING THE FIRST USER:
- ------------------------
- First, you need to create a new snmpv3 user and give them rights to
- do things:
- net-snmp-config --create-snmpv3-user -a "my_password" myuser
- WARNING: SNMPv3 pass phrases must be at least 8 characters long!
- The above line creates the user "myuser" with a password of
- "my_password" (and uses MD5 and DES for protection). (Note that
- encryption support isn't enabled in the binary releases downloadable
- from the net-snmp web site.) net-snmp-config will also add a line
- to your snmpd.conf file to let that user have read/write access to
- your agent. You may want to change this in your snmpd.conf file
- (see the snmpd.conf manual page). Run net-snmp-config --help for
- more information about it.
- Start the agent and test your setup:
- /usr/local/sbin/snmpd
- [...wait a few seconds... It will run in the background and
- return you to your shell immediately.]
- snmpget -v 3 -u myuser -l authNoPriv -a MD5 -A my_password localhost sysUpTime.0
- [ this should return information about how long your agent has been up]
-
- snmpget -v 3 -u myuser -l authPriv -a MD5 -A my_password
- -x DES -X my_password localhost sysUpTime.0
- [ this should return similar information, but encrypts the transmission ]
- CREATING A SECOND USER:
- -----------------------
- Start the agent (if you didn't do so above).
- You can create as many users as you like using the above method, but
- this details another way of doing it while the agent is running by
- modifying the user database using the snmp protocol itself:
- Now, lets create a second user using the first user (just for fun)
- for both authentication purposes and as a template (or "cloning
- source"):
- snmpusm -v 3 -u myuser -l authNoPriv -a MD5 -A my_password localhost create wes myuser
- The above should have created the user "wes" with the same password as
- the "myuser" user. So then, you need to change his password using:
- snmpusm -v 3 -u wes -l authNoPriv -a MD5 -A my_password localhost passwd my_password new_passphrase
- See, wasn't that easy? You can now create users. Wheeee....
- But, you'll have to add a configuration line that allows them access
- to do things. Do this with another "rwuser" line in your
- /usr/local/share/snmp/snmpd.conf file (you'll need to stop and start
- the agent again, or send the agent a SIGHUP signal):
- rwuser wes
- Or, optional use the "rouser" token instead of the "rwuser" token to
- only grant them read-only access.
- Now, test your new user:
- snmpget -v 3 -u wes -l authNoPriv -a MD5 -A new_passphrase localhost sysUpTime.0
- FURTHER STUDIES:
- ---------------
- Tired of all those command line authentication options?
- ----------------------------------------
- put something like this in your $HOME/.snmp/snmp.conf file (make it
- readable only by you!!!):
- defSecurityName wes
- defContext ""
- defAuthType MD5
- defSecurityLevel authNoPriv
- defAuthPassphrase new_passphrase
- defVersion 3
- And this is in place the last of the above example lines boils down to:
- snmpget localhost sysUpTime.0
- Which is about as simple as I can make it for ya ;-)