configuring snmpd when setting up jailed environment

Don Munyak don.munyak at
Fri Apr 6 12:51:49 UTC 2007

I am trying to make snmpd listen on a specific address for the JAIL
HOST(aka physical server) and each jailed environment (aka JAIL).

The server is server configured using the ezjail framework.

As I read "man (8) snmpd", I should be able to do this.

I am trying to make the JAIL HOST listen on udp:161
and a JAIL to listen on udp:161

obviously, each JAIL alias IP would be distinct for each jailed environment.

I have edited JAIL HOST /usr/local/etc/snmp/snmpd.conf to include
    "agentaddress udp:161 192.168.2222.90"

Where do I profile this?
How do I make this work?
What am I doing wrong?

I am humbly asking for assistance :)

Section: Net-SNMP (8)


    Listens for AgentX connections on the specified address rather
than the default "/var/agentx/master". The address can either be a
Unix domain socket path, or the address of a network interface. The
format is the same as the format of listening addresses described

==== some of my notes ===

JAIL Host hier, separate partition for jails

basejail & newjail

I did not modify the ezjail.conf file

# mount_procfs proc  /usr/jails/web/proc

>From within the JAIL
I installed /usr/ports/net-mgmt/net-snmp
# make
# make install clean

mkdir /snmp in /usr/local/etc
create snmpd.conf file
# cp /usr/local/share/snmp/snmpd.conf.example /usr/local/etc/snmp/snmpd.conf

Made minial changes to snmpd.conf in JAIL Host and JAIL.
#  source          community
# com2sec   local      localhost       public
com2sec     local public
com2sec     mynetwork      public

Added to JAIL rc.conf and JAIL HOST rc.conf
# vi /usr/jails/web/etc/rc.conf

restart the JAIL

>From JAIL
#  snmpwalk -c public -u com2sec -v 1 web system
This does output allot of expected snmp data EXCEPT that it is listing
the data for the JAIL HOST, not the JAIL.

#  less /var/log/snmpd.log
init_kmem: kvm_openfiles failed: /dev/mem: No such file or directory

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