[Plugins-writers] Re: Nessus not scanning

[Stuart Powell]

Hello, Richard.

Care to explain how one would be able to do what you said below ?  SuSE
have put out a patch for nmap, but it still doesn't work.  I need to
have this working for Monday, and would appreciate some pointers.

Thanks,
Stuart.

>>> Richard Moore <rich at westpoint.ltd.uk> 2/3/2004 4:52:27 AM >>>

Renaud Deraison wrote:

> On Fri, Jan 30, 2004 at 10:50:00AM -0500, JHORVAT1 at steelcase.com
wrote:
> 
>>I am having issues somewhat similar to what Ravi was seeing.  I want
to enable
>>the "Ping the remost host" option to do an ICMP ping because I'm
scanning
>>large subnets and want to move on quickly if something doesn't appear
to be
>>up.  The "Ping the remote host" option calls ping_host.nasl, and
using
>>Ethereal I found what seems to be the problem.  Nessus sends out an
ICMP echo
>>request, but hosts never reply, apparently because the IP header
checksum in
>>the ICMP packet is 0!  The relevant part of ping_host.nasl is below
(sorry if
>>the formatting is goofy):

Is this by any chance on a SuSE 9.0 box? There is a bug in the kernel
on 
9.0 which breaks nmap etc in just this way. The work around is to let 
the kernel compute the header checksum for you.

Cheers

Rich.


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