Renaud Deraison wrote:
On Fri, Jan 30, 2004 at 10:50:00AM -0500, [EMAIL PROTECTED] 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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