[Nagios-users] Checking remote servers & tunnels

[Brian J. Dent]

Nagios Users,   I’ve been using NAGIOS for several years to monitor my client’s networks and Windows servers.  Many of these clients have IPSec tunnels to their remote offices.  I’ve always been able to monitor the remote locations but never the status of the tunnel.  Since my NAGIOS server is remote to their location, it’s like coming in from the outside and making a left turn to check if the tunnel is up or down.    Reading through some code snippets gave me this idea using the NRPE_NT plug-in.  Obviously there are permutations but the basics work.   1) Duplicate the nrpe_nt_check_cmd in checkcommands.cfg and change the suffix to _remote.   2) Add this line to your nrpe.cfg file: command[nrpe_nt_check_remote]=c:\nrpe_nt\ping_remote.cmd 192.168.2.10 # where 192.168.2.10 is the remote server   3) Create a ping_remote.cmd file in the nrpe_nt folder: @ECHO OFF PING -n 1 %1 ¦ FIND "TTL=" > NUL   IF ERRORLEVEL 0 GOTO REMOTE_FOUND PING -n 1 -w 3000 %1 ¦ FIND "TTL=" > NUL   IF ERRORLEVEL 1 GOTO REMOTE_DOWN ECHO REMOTE CONNECTION TO %1 IS SLOW EXIT 1   :REMOTE_DOWN ECHO REMOTE CONNECTION TO %1 IS DOWN EXIT 2   :REMOTE_FOUND ECHO REMOTE CONNECTION TO %1 IS UP EXIT 0   REM OK = 0; REM WARNING = 1; REM CRITICAL = 2; REM UNKNOWN = 3;   Regards, bjd   ~Brian J. Dent