Remote port availability monitoring with notifications

I want to be able to watch a few remote systems for application availability and send a notification via SMTP if they bocome unavailable. I only need to see if the HTTPS port is listening say every minute and then send the notification.

I am sure I could do this with a script but would rather just use something already proven, open source and, even better, an RPM for FC4 or something that is straightforward to compile.

Anybody have any ideas?
LVL 4
ferg-oAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

LuxanaCommented:
Hi,

You can use lsof as the main core of your smalll IDS. Change "awk" to regex you prefer. This will check it every 10 secs.


#!/bin/bash
MAILTO="root"
HOSTNAME=`hostname`
getports() {
  lsof -i -n -P | awk '/LISTEN/ {print $1"/"$3"/"$8}' | sort -u
}

OLD="$(getports)"
echo -e "Services monitored:\n$OLD"
while sleep 10 ; do
  NEW="$(getports)"
  if test "$OLD" != "$NEW" ; then
    echo "Sending mail to administrator"
    mail -s "Warning: $HOSTNAME LISTEN-Status changed" $MAILTO <<EOF
#old status
$OLD

#new status
$NEW
EOF
  fi
  OLD="$NEW"
done


Hope this helps...
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
TintinCommented:
Nagios is what a lot of people use, but it maybe a little overkill if you're just monitoring a couple of servers.

http://nagios.org/
0
ferg-oAuthor Commented:
Hi thanks for these - the script option is beind me to customise and I would have trouble growing it out as I need to monitor more device.

Nagios is very configurable etc but definately too much for us at this stage - it would take me more time to configure it than I would save!

The only sorta easy things for dumb admins that I have found runs on Windows...
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Linux

From novice to tech pro — start learning today.