SNMP Trap Server howto:
Brett Lee
=============================================================================



- Download, build, and install net-snmp-5.x.x

    tar xvf net*; cd net*; ./configure; make; make test; make install



- Verify the binaries exist:

    [root@linux build]# ls /usr/local/sbin
    snmpd  snmptrapd
    [root@linux local]# ls /usr/local/bin
    encode_keychange  snmpbulkget   snmpget      snmptable      snmpwalk
    fixproc           snmpbulkwalk  snmpgetnext  snmptest       tkmib
    ipf-mod.pl        snmpcheck     snmpinform   snmptranslate  traptoemail
    mib2c             snmpconf      snmpnetstat  snmptrap
    mib2c-update      snmpdelta     snmpset      snmpusm
    net-snmp-config   snmpdf        snmpstatus   snmpvacm
    [root@linux local]#



- Create the configuration files.  The configuration files can have a couple
  possible names and locations - mine were in /usr/local/share/snmp/.

  If this is the initial installation of system, you may want to use the
  nice tool to generate them.  The tool will generate files in `pwd`, but
  if you pass it a '-i' option it will copy them to /usr/local/share/snmp/. 

  ========================================================================
  Usage is easy (just lots of options):

  [root@linux local]# /usr/local/bin/snmpconf

  I can create the following types of configuration files for you.
  Select the file type you wish to create:
  (you can create more than one as you run this program)

     1:  snmp.conf
     2:  snmptrapd.conf
     3:  snmpd.conf

  Other options: quit

  Select File:
  ========================================================================



- To setup trapd, ensure that the following files exist:

  /usr/local/share/snmp/snmp.conf
    (example can be found in this web directory)

  /usr/local/share/snmp/snmptrapd.conf
    (example can be found in this web directory)


- Fire up the listener:

  /usr/local/sbin/snmptrapd -A -d


- If logging is configured, observe the log file:

    tail -f /var/log/snmptrapd.log


- Test it out:

    For each type of access you have configured, run the appropriate command:

     - No Authentication, No Privacy:
     snmpinform -u <user> -l noAuthNoPriv <trapdserver> 42 coldStart.0

     - Authentication, No Privacy:
     snmpinform -u <user> -l authNoPriv -a MD5 -A <password> <trapdserver>

     - Authentication And Privacy:
     snmpinform -u <user> -l authPriv -a MD5 -A <authpassword> \
         -x DES -X <encryptpassword> <host> 42 coldStart.0


- If all is successful, your trapd server is working.

- Now you can setup your clients.


- If not:

  1.  Modify the debugging settings in 'snmp.conf'.  The trapd server
      reads this file as well as 'snmptrapd.conf'.

  2.  Make sure you are reading your new config file:
         # pkill snmptrapd
         # /usr/local/sbin/snmptrapd -A -c /usr/local/share/snmp/snmptrapd.conf
         # tail -f /var/log/snmptrapd.log