topic Network Realted in Operating System - Linux

Network Realted

Chakravarthi — Thu, 24 Apr 2003 11:21:27 GMT

Hi,

I'm trying to run a client software on linux machine and the server s/w is on solaris, the server to clinet the connectivity is over VPN, I can ping the server, and telnet, but client will send data to the server on a specific port,when i try to establish the connection, the socket connection is getting established, both i dont know whether the data is going or not, on the server end i cant check.

IS there any toll which can tell me the data is passing between these two machines, and which path it is taking,,,

regards
chakri

Re: Network Realted

Jerome Henry — Thu, 24 Apr 2003 11:35:52 GMT

I see tcpdump port 'yoursendingport' which'll show you data going out (crypted if ina VPN), and you'll be able to see if quantity of data match...
You could do the same through your server if you could control it even from outiside, but if you have no way to see it, you can just control the data out...
HTH
J

Re: Network Realted

Chakravarthi — Thu, 24 Apr 2003 16:30:22 GMT

please give me command example,,,

Re: Network Realted

Balaji N — Fri, 25 Apr 2003 02:42:17 GMT

install ethereal.

rpm -qi ethereal
Name : ethereal Relocations: (not relocateable)
Version : 0.9.6 Vendor: Red Hat, Inc.
Release : 1 Build Date: Wed 21 Aug 2002 06:02:03 PM IST
Install date: Thu 27 Mar 2003 06:41:58 PM IST Build Host: stripples.devel.redhat.com
Group : Applications/Internet Source RPM: ethereal-0.9.6-1.src.rpm
Size : 7891046 License: GPL
Signature : DSA/SHA1, Wed 04 Sep 2002 02:43:19 AM IST, Key ID 219180cddb42a60e
Packager : Red Hat, Inc. <>
URL : http://www.ethereal.com/
Summary : Network traffic analyzer.
Description :
Ethereal is a network traffic analyzer for Unix-ish operating systems.

This package lays base for libpcap, a packet capture and filtering
library, contains command-line utilities, and contains plugins and
documentation for ethereal. A GTK+ based graphical user interface is
available in a separate package.

+++++++++++++

www.ethereal.com for more info.

hth
-balaji

Re: Network Realted

U.SivaKumar_2 — Fri, 25 Apr 2003 03:52:22 GMT

Hi,

For tcp connections run this in client

#tcpdump tcp and dst host xxx.xxx.xxx.xxx and tcp port xx > mydata

here xxx.xxx.xxx.xxx is your servers IP address and xx is the server's application port.

Now after some time break the command.

See the mydata file.

#more mydata

regards,
U.SivaKumar