attachment:smux_patch.diff.tgz This is the patch made against -current of today (3rd of August 2006) to add SMUX capabilities to bsnmpd.

If you are using bsnmpd to monitor your network and are frustated because you can't use it to monitor Zebra bgpd or Freeradius radiusd the you should try this patch.

It is designed as a bsnmpd loadable module - hence you can load/ unload it to/ from main SNMP agent at any time (but because the patch contains a bunch of changes for core BSNMPd code you have to rebuild - and restart - the bsnmpd agent).

In odrer to build it I would suggest to do it outside your main tree. Here it is the procedure in detail:

1. Create a work area - let's say ~/smuxtest

mkdir -p ~/smuxtest
cd ~/smuxtest

1. Checkout the bsnmpd code from Freebsd cvs:

cvs co -D 2006/08/03 src/contrib/bsnmp src/lib/libbegemot src/lib/libbsnmp src/usr.sbin/bsnmpd

1. Export 2 variables in your shell:

MK_ATM to no (i.e. export MK_ATM=no in a korn based shell) 
and
LPRSRC to /usr/src/usr.sbin/lpr/common_source (i.e. export LPRSRC=/usr/src/usr.sbin/lpr/common_source)

1. Build (and install) it

cd ~/smuxtest/src/usr.sbin
ln -s /usr/src/usr.sbin/Makefile.inc .
cd  ~/smuxtest/src/lib/libbsnmp/
make (and make install as root)
cd ~/smuxtest/src/usr.sbin/bsnmpd/
make -E LPRSRC (and make -E LPRSRC install as root)

How to use bsnmpd with Freeradius

Make sure that Freeradius is compiled with snmp. Choose a password for SMUX. This will be shared by SMUX module and radiusd. Let's suppose this password is “secret”

Find the radiusd snmp config file - this is named snmp.conf (by default it is here /usr/local/etc/raddb/snmp.conf) Set the password here:

#
# snmp.conf - snmp configuration directives
#
# This file is *NOT* included by default.  To enable it, you will need
# to modify the SNMP CONFIGURATION section of "radiusd.conf".
#
#######################################################################

#######################################################################
#
#  SNMP configuration
#
#  NOTE: This part is only working if your radiusd is compiled with SNMP
#  support.
#
#  smux_password: Password used for SMUX registration.
#
#....comments deleted
#
#  smux 1.3.6.1.4.1.3317.1.3.1 verysecret
#
#  The default password is an empty password.
#
smux_password = secret
#
#  snmp_write_access:
#
# ....comments deleted
#
# allowed values: {no, yes}
#
snmp_write_access = yes

Edit your bsnmpd config file, usually /etc/snmpd.config, and add these lines:

begemotSnmpdModulePath."smux" = "/usr/lib/snmp_smux.so"
%smux
begemotSmuxAddr = 127.0.0.1
#begemotSmuxPort = 191
begemotSmuxPeerPassword.1.3.6.1.4.1.3317.1.3.1 = "secret"
begemotSmuxPeerTimeout.1.3.6.1.4.1.3317.1.3.1 = 1
begemotSmuxPeerStatus.1.3.6.1.4.1.3317.1.3.1 = 1

Now (re)start bsnmpd and then radiusd.

You can snmp walk the radiusd SNMP tree starting with RADIUS-AUTH-SERVER-MIB::radiusMIB.

Enjoy and don't forget to provide feedback (soc-victor/at/freebsd/dot/org).

Thanks a lot.

[“CategorySNMP”]