How to find what process is using a port in AIX 5L and above. Post: 302422872

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Operating Systems AIX How to find what process is using a port in AIX 5L and above. Post 302422872 by troym72 on Wednesday 19th of May 2010 04:20:08 PM

05-19-2010

Registered User

How to find what process is using a port in AIX 5L and above.

There have been a lot of threads about how to find processes that are using a specific port on an AIX server. After long hours of research and reading countless "you can't do that" responses, I finally found the answer.

YES IT CAN BE DONE! YES ITS EASY. NO, I DON'T KNOW WHY NO ONE GETS THIS ANSWER WHEN THEY ASK.

So here it is:

Recently, we had an issue with a port conflict on our server. Something was LISTENING on port 14248. You can find whether a port is in use by using the netstat command and grepping for the port number in question.

Code:

 
/>netstat -an | grep 14248
tcp        0      0  *.14248                *.*                    LISTEN

However, this is not enough to tell you what process is using the port, only that its being used. You can, however, add the -A argument to the netstat command and then use that output as an argument to the rmsock command to find the PID of the process using the port.

Code:

# netstat -Aan |grep 14248
f10007000864ebb0 tcp        0      0  *.14248            *.*                LISTEN
 
# rmsock f10007000864ebb0 tcpcb
The socket 0x864e808 is being held by proccess 143640 (java).
 
 
# ps -ef |grep 143640
    root  143640  127270   0   May 15      -  3:06 /var/opt/tivoli/ep/_jvm/jre/bin/java

Walla!! We see that the Tivoli java process is using port 14248.

Enjoy your new found power to find what process is using a port on your AIX server!

Cheers,
Troy Morton
Senior Technical Analyst
Hospital Sisters Health Systems

Last edited by troym72; 05-19-2010 at 05:48 PM..

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LEARN ABOUT OPENDARWIN

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)

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