Server dependencies Post: 302650503

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Top Forums UNIX for Dummies Questions & Answers Server dependencies Post 302650503 by frappa on Sunday 3rd of June 2012 09:12:37 AM

06-03-2012

Registered User

Hi,

not very clear what are you really looking for, but maybe this can help:
If you're trying to look for what network services the server is acting as a client (that is, applications running on the server that are acting as clients with regard to some network services):
1. netstat: look at external ports/services the server has in state ESTABLISHED or CLOSE_WAIT; run this command if you have a login account on the server. You could find services provided by the server itself (i.e. applications from the monitored server connecting to TCP/UDP sockets on the server itself).
2. a network traffic sniffing tool (i.e. tcpdump, wireshark, etc.) may also do the job, provided they are run for a sufficiently long time (many applications may have permanet traffic with external services while others may just connect once in a while). You don't have to run tcpdump or wireshark on the machine itself, as long as you have a machine in the same subnet as the server you are monitoring with a network interface capable of 'promiscuous mode'.

When you asked for nmap usage, remember that nmap is generally used to discover what network services are listening on the target server. Unless you run nmap on the target server itself, the results returned by nmap may be less comprehensive than the results returned by running netstat (this time, you would look to results with TCP/UDP sockets in state LISTENING), because a firewall may filter some sockets.

see ya
fra

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LEARN ABOUT OSF1

auscope

AUSCOPE(1)						      General Commands Manual							AUSCOPE(1)

NAME

       auscope - Network Audio System Protocol Filter

SYNOPSIS

       auscope [ option ] ...

DESCRIPTION

       auscope	is  an	audio  protocol  filter  that can be used to view the network packets being sent between an audio application and an audio
       server.

       auscope is written in Perl, so you must have Perl installed on your machine in order to run  auscope.   If  your  Perl  executable  is  not
       installed  as  /usr/local/bin/perl,  you should modify the first line of the auscope script to reflect the Perl executable's location.  Or,
       you can invoke auscope as

       perl auscope [ option ] ...

       assuming the Perl executable is in your path.

       To operate, auscope must know the port on which it should listen for audio clients, the name of the desktop  machine  on  which	the  audio
       server  is running and the port to use to connect to the audio server.  Both the output port (server) and input port (client) are automati-
       cally biased by 8000.  The output port defaults to 0 and the input port defaults to 1.

ARGUMENTS

       -i<input-port>
	       Specify the port that auscope will use to take requests from clients.

       -o<output-port>
	       Determines the port that auscope will use to connect to the audio server.

       -h<audio server name>
	       Determines the desktop machine name that auscope will use to find the audio server.

       -v<print-level>
	       Determines the level of printing which auscope will provide.  The print-level can be 0 or 1.  The larger  numbers  provide  greater
	       output detail.

EXAMPLES

       In  the	following  example,  mcxterm is the name of the desktop machine running the audio server, which is connected to the TCP/IP network
       host tcphost.  auscope uses the desktop machine with the -h command line option, will listen for client requests on port 8001  and  connect
       to the audio server on port 8000.

       Ports  (file  descriptors)  on the network host are used to read and write the audio protocol.  The audio client auplay will connect to the
       audio server via the TCP/IP network host tcphost and port 8001:

	      auscope -i1 -o0 -hmcxterm

	      auplay -audio tcp/tcphost:8001 dial.snd

       In the following example, the auscope verbosity is increased to 1, and the audio client autool will connect to the  audio  server  via  the
       network host tcphost, while displaying its graphical interface on another server labmcx:

	      auscope -i1 -o0 -hmcxterm -v1

	      autool -audio tcp/tcphost:8001 -display labmcx:0.0

SEE ALSO

       nas(1), perl(1)

COPYRIGHT

       Copyright 1994 Network Computing Devices, Inc.

AUTHOR

       Greg Renda, Network Computing Devices, Inc.

								       1.9.3								AUSCOPE(1)