In this guide I just install configure SNMP daemon on Proxmox. SNMP is used to read out the state of the machine, this includes CPU, network (-traffic, -settings,…), memory, … I can suggest LibreNMS, for the monitor. Back to setting SNMP daemon up !


Install the service

apt-get install snmpd

Config the service

I like to backup the original configuration (for documentation) :

mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.ori

Then I create the config file : /etc/snmp/snmpd.conf

# this create a  SNMPv1/SNMPv2c community named "my_servers"
# and restricts access to LAN adresses 192.168.0.0/16 (last two 0's are ranges)
rocommunity my_servers 192.168.0.0/16

# setup info
syslocation  "rack 1, room 3, serverrroom"
syscontact  "Svenn"

# open up
agentAddress  udp:161

# run as
agentuser  root

# dont log connection from UDP:
dontLogTCPWrappersConnects yes

# fix for disks larger then 2TB
realStorageUnits 0

If needed add an exception to the firewall :

iptables -A INPUT -s 192.168.0.0/16 -p udp --dport 161 -j ACCEPT

And start the service :

# debian starts services on install
service snmpd restart

And enable by default :

update-rc.d snmpd enable

Test

after that its time to test if the connection works from the server that is going to listen to the snmpd :

snmpwalk -c my_server -v1 servername SNMPv2-MIB::sysDescr.0

This should return something like :

SNMPv2-MIB::sysDescr.0 = STRING: Linux  ...

That’s it, happy tracking !