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Full Discussion: Test Connection to hosts
Top Forums UNIX for Dummies Questions & Answers Test Connection to hosts Post 302711521 by SkySmart on Saturday 6th of October 2012 05:46:15 PM
Old 10-06-2012
Test Connection to hosts

i have about 3500 hosts/devices which i monitor.

i monitor them from one host. we'll call this one host HOSTA. HOSTA has connectivity to all 3500 hosts/devices.

now, i have to create a backup for HOSTA. and the back up is in another state.

how do i get a list of all open ports on HOSTA so I can have them replicated on HOSTB?

please keep in mind, i wont be the one making the actual change. i just need to have the information ready to give to the necessary personnel that will be setting it up.

so the options i have in mind are:

Code:
nmap OR
netcat (nc)

how can i use either of these two commands to get all open ports that HOSTA can connect to on all 3500 hosts/devices?

for example:

lets say one of the 3500 hosts/devices i monitor is called merchant-01.skysmart.net

i'm hoping there will be a command similar to this:

Code:
nmap HOSTA merchant-01.skysmart.net

what i'll be expecting the aforementioned command to do is get me a list of ALL OPEN ports that HOSTA can connect to on merchant-01.skysmart.net. when i say all, i mean all. udp, tcp, whichever.

any ideas?

os: Linux Red Hat/SunOS
 

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gkrellmd(1)							   User's Manual						       gkrellmd(1)

NAME
gkrellmd - The GNU Krell Monitors Server SYNOPSIS
gkrellmd [ --help ] [ --verbose ] [ -u | --update-hz N ] [ -m | --max-clients N ] [ -P | --port N ] [ -a | --allow-host hostname ] DESCRIPTION
gkrellmd Listens for connections from gkrellm clients. When a gkrellm client connects to a gkrellmd server all builtin monitors collect their data from the server. However, the gkrellm process is running on the local machine, so any enabled plugins will run in the local context (Flynn is an example exception to this since it derives its data from the builtin CPU monitor). Also, any command launching will run commands on the local machine. There is no support for file system mounting and local mailbox checking on the machine where the gkrellmd server is running. OPTIONS
-h --help Displays usage information and exits. -v --version Prints gkrellmd version and exits. -V --verbose Prints connection progress. -u, --update-hz f Sets the data update frequency in samples per second for the server. This is independent of and should be less than the gkrellm client update rate. The rate can be from 1 to 10 and should be lower to minimize network traffic. A value of not much more than 1/2 the client update rate is best where it is not important to minimize network traffic. -m, --max-clients N Sets the maximum number of simultaneous clients allowed to connect to the server. -P, --port server_port Use server_port for the network connection. -a, --allow-host hostname Specify hosts which are allowed to connect. Multiple allow-host arguments may be given. If no hosts are specified on the command line or in a gkrellmd.conf file, then all hosts are allowed to connect. Also, if hostname is the keyword ALL then all hosts are allowed. This option is additive and specified hosts will be added to the hostnames listed in gkrellmd.conf files unless the --clear-hosts option is given first. -c, --clear-hosts Clears the current list of allowed hosts. Use this before any --allow-host arguments if you want command line allowed hosts to override and not be additive to those specified in gkrellmd.conf files. FILES
/etc/gkrellmd.conf System server config which is read first. The config file may contain lines similar to the command line args. For example: allow-host localhost allow-host 127.0.0.1 port 19150 max-clients 2 update-hz 2 /usr/local/etc/gkrellmd.conf Local server config file which is read second. ~/.gkrellmd.conf User server config file which is read last. With the exception of --allow-hosts, command line args will override options in gkrellmd.conf files. AUTHOR
Bill Wilson <bill@gkrellm.net>. http://www.gkrellm.net/ GNU
/Linux July 24, 2002 gkrellmd(1)
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