From: chuck gelm <chuck@gelm.net>
To: Ray Olszewski <ray@comarre.com>
Cc: linux-newbie@vger.kernel.org
Subject: Re: Displaying 'ping' data with 'tcpdump' ?
Date: Fri, 13 Aug 2004 20:40:35 -0400 [thread overview]
Message-ID: <411D5F83.4030409@gelm.net> (raw)
In-Reply-To: <5.1.0.14.1.20040813130631.01f9fd58@celine>
Ray Olszewski wrote:
> At 03:46 PM 8/13/2004 -0400, chuck gelm wrote:
>
>> Hi, Everyone:
>>
>> I am having difficulty displaying the pattern data
>> inside a 'ping' packet using 'tcpdump'.
>>
>> I am sending a periodic 'broadcast' padded with 'data':
>> ping -f -i 3600 -p 204445204E43385120 #" DE NC8Q "
>>
>> I want to display this data on a console. I am using
>> 'tcpdump -i eth1 -v -X'
>> but this shows too much data/activity.
>>
>> 'tcpdump -i eth1 -v -X port 7' displays nothing.
>>
>> Perhaps something other than 'tcpdump' would be more suitable?
>>
>> 1. How can I display only the 'echo request' packets?
>
>
> tcpdump icmp[icmptype]=icmp-echo -v -X
>
>> 2. How can I display only the 'echo reply' packets?
>
>
> tcpdump icmp[icmptype]=icmp-echoreply -v -X
:-) Thanks, Ray.
Now I see it in the man page. :-|
I am 'playing' with some 802.11b (USA FCC Part 15) devices
and configuring them to use frequencies inside the USA Amateur
Radio assignment (USA FCC part 97).
Then I can legally use antennas other than the ones that came
with the device. I have some 24dbi gain dish antennas and I
want to try to use passive reflectors to overcome the
limitations of 'line of sight'.
This 'ping - tcpdump' will show that I am compling with the
'Station Identification' requirements.
Many thanks,
Chuck
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next prev parent reply other threads:[~2004-08-14 0:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-13 9:21 Gnome, KDE won't Open Peter
2004-08-13 17:07 ` Ray Olszewski
2004-08-13 19:46 ` Displaying 'ping' data with 'tcpdump' ? chuck gelm
2004-08-13 20:15 ` Ray Olszewski
2004-08-14 0:40 ` chuck gelm [this message]
2004-08-14 2:50 ` Gnome, KDE won't Open Peter
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