Re: [Plugins-writers] Re: Nessus not scanning

From: Stuart Powell (SPowell@private)
Date: Fri Feb 06 2004 - 14:19:59 PST

  • Next message: Dennis Jackson: "[Plugins-writers] icmp_timestamp.nasl (10114)"

    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@private> 2/3/2004 4:52:27 AM >>>
    
    Renaud Deraison wrote:
    
    > On Fri, Jan 30, 2004 at 10:50:00AM -0500, JHORVAT1@private
    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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