Penetration Testing mailing list archives

RE: Does Debian drop customized fragmented packets?


From: <Derek_Chen () trend com tw>
Date: Fri, 23 Oct 2009 10:29:32 +0800

The value has already been 0. Is there other setting that may affect the behavior?

Regards,
Derek

-----Original Message-----
From: Huzeyfe ONAL(Gmail) [mailto:huzeyfe.onal () gmail com] 
Sent: Thursday, October 22, 2009 1:58 PM
To: Derek Chen (RD-TW)
Cc: pen-test () securityfocus com
Subject: Re: Does Debian drop customized fragmented packets?

Hi,

try after disabling spoof protection on the interface which you'r
trying to send frag. packets.

If you read readme.debian for fragroute package it says " ... Under
GNU/Linux, this behaviour is most likely controlled by the kernel.
You can set the specific interface by using:     echo "0" >
/proc/sys/net/ipv4/conf/INTERFACE/rp_filter



---
Huzeyfe ONAL
Ag Guvenligi Listesine uye oldunuz mu?
http://www.lifeoverip.net/netsec-listesi/

---


On Tue, Oct 20, 2009 at 1:17 PM, <Derek_Chen () trend com tw> wrote:

Hi,

I'm trying to customize an abnormal fragmented packet by setting the fragment offset to a large value. When I sent 
out the packet, I can sniffer it on the local machine but cannot find it on the LAN. I doubt this packet has never 
been sent out of the machine. Is there anyone having the same experience? The tool I use is Scapy.

Regards,
Derek

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Prove to peers and potential employers without a doubt that you can actually do a proper penetration test. IACRB CPT 
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