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RE: AS400 telnet traffic
From: "Art Cooper" <acooper () pop innerwall com>
Date: Fri, 21 Apr 2006 08:56:40 -0600

Yeah, That's what I thought.  Gam, in order to look at the EBCDIC, there are 
choices to view it correctly on Ethereal and most other packet capture 

On Fri, 21 Apr 2006 09:49:11 -0400, McLean, Michael R wrote
The AS400 does use EBCDIC.

-----Original Message-----
From: Art Cooper [mailto:acooper () pop innerwall com]
Sent: Thursday, April 20, 2006 7:12 PM
To: gamgamus () yahoo com; pen-test () securityfocus com
Subject: Re: AS400 telnet traffic

If I remember correctly - the AS400 may be encoding EBCDIC and 
that's why it 
 looks like gobbedly-gook.. I could be wrong, but I 
think that's it...

On 20 Apr 2006 16:37:33 -0000, gamgamus wrote

I have captured some AS400 telnet traffic with tcpdump on port tcp 23.

It seems to be encoded in some way, because I only can see a few 
initial cleartext words, like: IBMRSEED, KBDTYPE, CODEPAGE, IBM-
3477. The following stream of words are unreadable with encoding or 

When I see the dump with Ethereal, the decoded data are like:

\000\r\022\240\000\000\004 and goes on...

Does anyone known how to decode this capture to get the cleartext form?

Thanks in advance,


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