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TCPDUMP question

Posted on 2004-09-08
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Last Modified: 2010-04-22
Is there any advantage in displaying hex output? ( -x switch)?
Currently I use tcpdump with the -n -e -s 1514 switches.  Does viewing hex have any advantages? Are you viewing the actual encapsulated data when you do this?
Thanks
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Question by:dissolved
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by:ahoffmann
ahoffmann earned 50 total points
ID: 12008271
-x will show you non-printables too

> Are you viewing the actual encapsulated data when you do this?
if you mean encapsulated in IP or TCP or UDP or ARP, yes
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net_sec_guru earned 450 total points
ID: 12009330
tcpdump –x looks at packages in hex format

tcpdump –X looks at packages in hex and Ascii format

I use the -X option myself... so yes, there is an advantage to using at as I get to see hex & ascii characters...
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by:dissolved
ID: 12009417
Thank you. What is the point of viewing the hex and ascii?  Does it give any pertinent information?  
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by:ahoffmann
ID: 12010272
> Does it give any pertinent information?
depends on your definition of that ;-)
simply testit it out
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