NetXMS Support Forum

hi all,

I just wonder if there is any monitor on the trace route result! What I want to do is if the predefined traceroute result is different from the real time traceroute result, an alert should be sent out.

Thanks!

Pedro

hi All, after digging on the forum, I finally figured out how to do that. Basically, I use ExternalParameter to implement the traceroute checking function.  Here is what I did :-

1) Create a powershell script in a host, check_3hoptracert.ps1

2) In the nxagentd.conf, add this line

ExternalParameter = Check_3Hop(*): "c:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "D:\netxms-agent\bin\check_3hoptracert.ps1" $1 $2 $3 $4

3) In NetXMS console, add a DCI per the screen attached.

Please make sure the AgentCommandTimeout specified in server configuration and exectimeout specified in nxagentd.conf are large enough to execute the script.

I hope this can help someone in the future. Thanks!

check_3hoptracert.ps1
===============
# This script is to check whether the first 3 hops of a traceroute is the same as the specifed ip addresses
# Return "OK" if same; otherwise "Changed"
#
# Usage : check_3hoptracert hostname 1st-hop 2nd-hop 3rd-hop
#
# Written by Pedro on 29/5/2014


# Get arguments
$hostname = $args[0]
$ip1 = $args[1]
$ip2 = $args[2]
$ip3 = $args[3]


# Run traceroute
tracert -d $hostname > c:\temp\tracert.txt

# Get 1st hop
$hop1 = get-content c:\temp\tracert.txt | select-object -skip 3 | select-object -First 1 | % { $_.substring(32,9); }
#write-host $hop1  " " $ip1
if ( $hop1 -ne $ip1 ) {  write-host "Changed"; EXIT 0; }

# Get 2nd hop
$hop2 = get-content c:\temp\tracert.txt | select-object -skip 4 | select-object -First 1 | % { $_.substring(32,9); }
#write-host $hop2
if ( $hop2 -ne $ip2 ) {  write-host "Changed"; EXIT 0; }


# Get 3rd hop
$hop3 = get-content c:\temp\tracert.txt | select-object -skip 5 | select-object -First 1 | % { $_.substring(32,9); }
#write-host $hop3
if ( $hop3 -ne $ip3 ) {  write-host "Changed"; EXIT 0; }

# The traceroute result is the same as specified
write-host "OK"
del c:\temp\tracert.txt
EXIT 1