Setting up A Network Monitoring and Inventory System

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Revision as of 14:07, 9 September 2010 by Jbilyk (talk | contribs) (Progress Log: Added notes on what worked and didn't with auto-add scripts)
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This material is work-in-progress ...

Do not follow instructions here until this notice is removed.
(Last edited by Jbilyk on 9 Sep 2010.)

This guide will set up (list subject to change):

This guide will assume:

  • You have a knowledge of your network setup (at least know which subnets exist)
  • Your network allows ICMP ping packets to every device that you want discovered and automatically added to the system
  • Your firewalls (whether on your networking devices or end-user devices) allow traffic back to the server that is being set up, and if it is a Windows host, allows WMI queries in
  • If you are auditing a Windows domain, you have access to an account that has local administrator privileges on every computer (on Win XP a user with Power User privileges may be enough)


Basic concept is to combine the above apps/utilities to create an easy to set up and low upkeep monitoring system that also tracks inventory thanks to OpenAudit. Redundant entries in configs will be kept to a minimum (hopefully). New devices should be auto-added to monitoring systems, along with associated services (for example, a Windows server running MS Exchange might have basic services such as CPU load, HD free space, running services and Exchange queues monitored, whereas a router running on Alpine Linux would might need the routing table, throughput, and opennhrp monitored). Also, software licensing should be monitored so that Windows boxes do not exceed purchased licenses.

Progress Log

Set up Alpine server with Lighttpd 1.4.28-r0, PHP 5.3.3-r2 and MySQL 5.1.50-r0 with OpenAudit 09.12.23. Windows box can be audited with results returned to Alpine.
Set up test cacti system and made sure the basics work with the new aport.
SNMPTT receives snmp traps properly and sends them on to Nagios but they aren't parsed in any way yet.
Installed Nagiosql, need to investigate potential usage + OpenAudit integration.
Got nmap results into OpenAudit. Needed a change in admin_nmap_input.php line 48 ("Interesting ports on" -> "Nmap scan report for"), for which a bug report was filed upstream. Got pingable/resolvable hosts automatically added into OpenAudit:

  • When auto-adding using scripts below, Windows versions 2000 (Pro and Server), XP Pro, 2003 (inc R2)(Std/Ent)(x86/x64) were detected. Windows 7 Pro only detected when the local firewall was set to allow RPC traffic through
  • Some printers (HP LJ3300, LJ8100) were detected whereas other models weren't
  • No networking devices (switches/routers) were added

Operational Concept

Nmap -> OpenAudit

  1. Scheduled nmap ping sweep of subnets (one at a time)
  2. Check if hosts have been audited recently
  3. If not, trigger an nmap OS detection
  4. If Windows, trigger a remote audit
  5. If other device type, do ___ to audit

OpenAudit -> Nagios (or Cacti, or Smokeping)

  1. Schedule a query of Windows Servers from OpenAudit + installed software
  2. Check that nagiosql has each server in it
  3. If it doesn't, add host monitoring + base services
  4. For each MS software (such as Exchange, SQL, DPM), add services

For bonus points:

  1. Query LLDP to find out where device is and set up dependencies automatically
  2. SNMPTT integration to Nagios (setup based on device info in OpenAudit)

Random scripts

Since part of implementation runs on Windows, a set of scripts that can run on both Windows and Alpine Linux are being put together. a one-line linux command to replace all of the ping-sweep* and lookup* batch files. Ping-sweep*.bat: does an nmap ping sweep of each subnet in subnet.txt and writes all hosts that are up to a file lookup*.bat: does a A record DNS lookup for each host that's pingable and writes results to a file insert-hosts*: for each resolvable host, downloads the vbscript to insert the host information into openaudit (uses WMI to get hardware, OS and software info) (replaces all batch files below)

for IPADDRESS in `nmap -sP 10.14.8-39.0-255 | grep "Nmap scan report for" | awk -F ' ' '{print $NF}' | sed s/\(// | sed s/\)//`;do nslookup $IPADDRESS | grep "name =" | awk -F '=' '{print $2}';done


cd C:\Program Files\WAMP\www\openaudit\scripts\scans
for /F %%i in (subnets.txt) do ping-sweep-backend.bat %%i


@echo off
cd C:\Program Files\WAMP\www\openaudit\scripts\scans
del %1.ip.txt
nmap -sP %1 | "C:\program files\utilities\bin\grep" "Nmap scan report for" | "C:\Program Files\Utilities\bin\awk" -F " " "{print $NF}" | "C:\Program Files\Utilities\bin\awk" -F "(" "{print $NF}" | "C:\Program Files\Utilities\bin\awk" -F ")" "{print $1}" >> %1.ip.txt


cd C:\Program Files\WAMP\www\openaudit\scripts\scans
for /F %%i in (subnets.txt) do lookup-subnet.bat %%i


@echo off
cd C:\Program Files\WAMP\www\openaudit\scripts\scans
for /F %%i in (%1.ip.txt) do @lookup-backend.bat %%i >>


@nslookup %1 | "C:\program files\utilities\bin\grep" "Name:  " | "C:\program files\utilities\bin\awk" -F " " "{print $2}"


@echo off
cd C:\Program Files\WAMP\www\openaudit\scripts\scans
for /F %%i in (subnets.txt) do insert-hosts-subnet.bat %%i


@echo off
cd C:\Program Files\WAMP\www\openaudit\scripts\scans
for /F %%i in ( do @insert-hosts-parse.bat %%i


@echo off
cd C:\Program Files\WAMP\www\openaudit\scripts\scans
echo %1 | "C:\Program Files\Utilities\bin\awk.exe" -F "." "{print $1}" > temp-out-insert.txt
for /F %%A in (temp-out-insert.txt) do @insert-hosts-backend.bat %%A
del temp-out-insert.txt


cd C:\Program Files\WAMP\www\openaudit\scripts\scans
"C:\Program Files\Utilities\bin\wget.exe" "http://camgmt01/openaudit/launch_local_audit.php?" -O %1.vbs
cscript %1.vbs
del %1.vbs

subnet.txt (snippet)