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Full Discussion: how to monitor ports
Operating Systems Solaris how to monitor ports Post 302121045 by mhm4 on Monday 11th of June 2007 11:35:10 AM
Old 06-11-2007
how to monitor ports

I run into this issue occasionally and just looking for suggestions on how others solved it. I would like to monitor ports on a large number of systems and would like to determine which systems are listening on specific ports. I know there are heavy-weight apps that provide this such as HP ovo but I am looking for some light-weight open source options. I believe a syn scan will be sufficient for my purpose but I have not used any tools previously or not sure if their is a way to use default system tools or commands for this. Also for the those that have used syn scanning, does anyone run into issues due to simulating a syn attack in any of your networks?

Before you relpy, please do not recommend ping as it does not provide the functionality that I am looking for. Also, telnet will not provide this functionality because I do not what to have to script any break out or termination sequences for various connections (ie sendmail - port 25).
 

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MRTG-PING-PROBE(1)					      General Commands Manual						MRTG-PING-PROBE(1)

NAME
mrtg-ping-probe - ping probe module for Multi Router Traffic Grapher DESCRIPTION
mrtg-ping-probe is a ping probe module for MRTG 2.x. It is used to monitor the round trip time and packet loss to networked devices. MRTG uses the output of mrtg-ping-probe to generate graphs visualizing minimum and maximum round trip times or packet loss. mrtg-ping-probe is not run directly, but is called by MRTG as a helper when it needs to determine ping time to a host. Act responsibly: do not use mrtg-ping-probe to ping devices without the owner's permission. Just imagine if 10,000 people decided to ping your hosts! mrtg-ping-probe is meant to be used within your network to get round trip time performance figures for your network. OPTIONS
To use mrtg-ping-probe you need to configure MRTG to call it from within the definition of a target host. This is done in the MRTG config file, which is usually /etc/mrtg.conf. Here's an example snippet: change the target name and IP address to suit your needs. Target[your.target.ping]: `/usr/bin/mrtg-ping-probe 123.456.789.123` SetEnv[your.target.ping]: MRTG_INT_IP="123.456.789.123" MRTG_INT_DESCR="ping" MaxBytes[your.target.ping]: 100 AbsMax[your.target.ping]: 200 Options[your.target.ping]: gauge, growright YLegend[your.target.ping]: ping time (ms) ShortLegend[your.target.ping]: ms Legend1[your.target.ping]: Maximum Round Trip Time in ms Legend2[your.target.ping]: Minimum Round Trip Time in ms Legend3[your.target.ping]: Maximal 5 Minute Maximum Round Trip Time in ms Legend4[your.target.ping]: Maximal 5 Minute Minimum Round Trip Time in ms LegendI[your.target.ping]:  Max: LegendO[your.target.ping]:  Min: Pay close attention to the backticks in the first line which tell MRTG to execute the nominated external program. Note also that you need to use the "gauge" option, since the results of subsequent ping probes are independant values and not an incrementing counter. SEE ALSO
mrtg(1). The latest release of mrtg-ping-probe can be found on the web at http://pwo.de/projects/mrtg/ AUTHOR
This manual page was written by Jonathan Oxer <jon@debian.org>, for the Debian project (but may be used by others). April 14, 2003 MRTG-PING-PROBE(1)
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