Nmap Development: Another potential solution to SuSe 9 IP checksum problem

[Fyodor <fyodor () insecure org>]

It appears from the message below that SuSe has fixed the kernel IP
checksum problem that was causing Nmap to fail.  Apparently upgrading
to their 2.4.21-199 kernel resolves the issue.

If upgrading kernels makes you nervous, you can alternatively still
set HAVE_IP_IP_SUM in nbase/nbase_config.h in the source tree to zero
after you run ./configure but before "make".  But this approach will
only fix the problem for Nmap and not other low-level packet tools.

-Fyodor

----- Forwarded message from "John S. Gaythorpe" <jsg () metrocast net> -----

Date: Tue, 23 Mar 2004 13:26:31 -0500
X-Mailer: Microsoft Office Outlook, Build 11.0.5510
From: "John S. Gaythorpe" <jsg () metrocast net>
To: <nessus () list nessus org>
Subject: RE: Nessus and Suse 9.0 again...

 Thank you for the idea!

I ran the update and the 2.4.21-199 kernel does fix the problem!



> ===== Original Message From "John S. Gaythorpe" <jsg () metrocast net> 
> ===== Well I know nessus and Suse 9.0 aren't playing well together. I 
> did get nmap
> 3.48 compiled and running with the recommended option (in NBASE:
> nbase_config.h define: HAVE_IP_IP_SUM 0)
>
> But nessus will not run (dead host thing.) Now I know it's a SUSE 
> problem, but is there a workaround (like for NMAP?)
 
I had the same problem on SuSE 9.0.  However, after upgrading the kernel to
"2.4.21-199smp4G," Nessus is happy again.
 
Note: I have an SMP machine, so that kernel may be compiled with different
options for a single processor box.
 
-C


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