That one works here, do you get an error message? Maybe your server doesn't run a daytime service on port 13. Mine doesn't, so I get "cannot connect to daytime port", but adapting it to use a port number for which there is a server allows it to work just fine; there is certainly nothing wrong with the code. Changing it to use port 22, for example, it will print the SSH banner from the SSH server (and then nothing, because it obviously doesn't speak that protocol -- that's why they chose daytime, because it uses such a mind-bogglingly stupid, er, I mean, easy-to-understand demo protocol.)
If you don't have previous experience with network protocols, play around with netcat for a while. Maybe it's actually all you will ever need.
Last edited by era; 05-12-2008 at 02:42 PM..
Reason: Ctrl-C to break out of netcat
Hi,
We have developed a server program using TCP/IP Communication to communicate with another client program. After running for some days we find the TCP/IP connection from the server program is getting slower.
What i mean to say is since the send() function in the server program (it is... (2 Replies)
Hi,
Users are connecting thru a KCML Client to UNIX machine, and I want to know which TCP/UDP port that client uses? How can I check the port of a user logged in?
Regards,
Tayyab (2 Replies)
Hi Experts,
need help about release or refresh TCP Connection:
i have the sample like below :
application log connection:
0500 ( 192.168.0.1:36053) 00919 2007/05/10 23:30:25 112 13 2007/05/10 23:30:25 1969/12/31 17:00:00
0500 ( 192.168.0.1:36054) 00920 2007/05/10 23:30:26 000 00... (3 Replies)
Hello. I would like to know how to close an existing tcp socket. I have read some stuff and learned how to create a socket and then close it but have not found anything about how to close an existing tcp socket created by another application. The situation is this: I have an ODBC server running and... (6 Replies)
Hello,
Actually there are some bugs in application which does not close the TCP connection to other server though CORBA.
We need to kill that ESTABLISHED connections as new connection are not happeneing as the allocated ports were used and showing as ESTABLISHED
Is there any... (4 Replies)
Dear experts,
I am seeing a lot of TCP failed connection attempts from "netstat -s" on one of our servers.
How can I pin point what connection failed and what are the ports involved?
Any tools/commands I can dig in deeper to diag. what went wrong on these "failed connection attempts"?
... (2 Replies)
Why this happens?
How to solve this?
$netstat -na |grep 9325
tcp 0 0 127.0.0.1:9325 127.0.0.1:9325 ESTABLISHED
When a client socket repeatedly tries to connect to an inactive(no server socket is listening on this port) local port,connect succeeds.
... (1 Reply)
Hi,
I use solaris Unix .
I find there is some problem in application and it generate many "close-wait" tcp connect and stay in the server . it is generate by process id 7740
root@XX # netstat -an | grep CLOSE_WAIT | wc -l
285
root@XX # netstat -an | grep CLOSE_WAIT
10.158.35.4.34805 ... (2 Replies)
Hi.
I am writing client - server application using TCP sockets.
I need some very basic functionality, namely: how to check if another "participant" of the connection is still present?
I want to handle situations, when client is gone, or server breaks down, etc. (25 Replies)
I am trying to send json messages to a port on a linux server from a remote server running a .net program. I have one implementation running with successful incoming messages to port 1514. I tried to replicate the same thing but just to another port but cannot get it to work as I get the following... (3 Replies)
Discussion started by: unienewbie
3 Replies
LEARN ABOUT DEBIAN
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)