Search Exchange
Search All Sites
Nagios Live Webinars
Let our experts show you how Nagios can help your organization.Login
New ListingsDirectory Tree
Check Number Of Connections
Meet The New Nagios Core Services Platform
Built on over 25 years of monitoring experience, the Nagios Core Services Platform provides insightful monitoring dashboards, time-saving monitoring wizards, and unmatched ease of use. Use it for free indefinitely.
Monitoring Made Magically Better
- Nagios Core on Overdrive
- Powerful Monitoring Dashboards
- Time-Saving Configuration Wizards
- Open Source Powered Monitoring On Steroids
- And So Much More!
You can check the number of established network connections of a specific user or the number of network connections of a given command. Those two options can be combined.
Note: This script uses lsof with sudo.
Make sure your /etc/sudoers is properly configured.
For example put the following line into /etc/sudoers
nagios ALL=NOPASSWD: /usr/sbin/lsof
Please refer to the manpages for further options.
Examples of usage:
/usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -C httpd
Will check the number of network connections for any command containig httpd. If the number of established connections is equal to or exceeds 200 a warning is reported, if it's more or equal to 250 the an error.
/usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -u apache
Same as above except not commands containing httpd will be checked but any commands owned by user apache. You can also use uids instead of login names.
/usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -u apache -C httpd
This checks only commands containing httpd owned by user apache.
Released under the LGPL, visit http://www.gnu.org/licenses/lgpl.html for details.
Tested on:
- Redhat Linux 7.3 (x86)
- Fedora Core 4 (x86)
- Gentoo Linux 2006.1 (x86)
- Solaris 10 (sparc)
Note: This script uses lsof with sudo.
Make sure your /etc/sudoers is properly configured.
For example put the following line into /etc/sudoers
nagios ALL=NOPASSWD: /usr/sbin/lsof
Please refer to the manpages for further options.
Examples of usage:
/usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -C httpd
Will check the number of network connections for any command containig httpd. If the number of established connections is equal to or exceeds 200 a warning is reported, if it's more or equal to 250 the an error.
/usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -u apache
Same as above except not commands containing httpd will be checked but any commands owned by user apache. You can also use uids instead of login names.
/usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -u apache -C httpd
This checks only commands containing httpd owned by user apache.
Released under the LGPL, visit http://www.gnu.org/licenses/lgpl.html for details.
Tested on:
- Redhat Linux 7.3 (x86)
- Fedora Core 4 (x86)
- Gentoo Linux 2006.1 (x86)
- Solaris 10 (sparc)
Reviews (1)
bysardar, January 15, 2015
It works perfectly fine but facing problem by using check_connection.pl script with NRPE. It returns zero connection count.
./check_nrpe -H host-name -c command-name
gives...
OK - Established connections: 0
help would be appreciated, THANKS
./check_nrpe -H host-name -c command-name
gives...
OK - Established connections: 0
help would be appreciated, THANKS
