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Re: EXPERT IPv6 network scaning
From: David Fifield <david () bamsoftware com>
Date: Wed, 11 Apr 2012 23:49:47 -0700

On Thu, Apr 12, 2012 at 10:58:39AM +0530, niteesh kumar wrote:
On Wed, Apr 11, 2012 at 7:46 AM, David Fifield <david () bamsoftware com>wrote:

On Wed, Apr 11, 2012 at 01:19:08AM +0530, niteesh kumar wrote:
I observed one more thing, target-ipv6-multicast-slaac.nse do scan a lot
of
ips which MLD script doesnot but those ip which are not scanned my MLD
are
also not responding to Ping msgs <ECHO>. this may be attributed to
machines
who actually take part in address configuration but do not communicate in
IPv6 network or may be due to some firewall not responding to ICMP
packets.
May be a possibility that the slaac script is not checking the
reachability  of scanned nodes.

This is common to all targets scripts. I have seen phantom addresses
come from the slaac script on Windows too. Scripts should not verify
addresses themselves. Nmap will do its own more reliable ND verification
of the added addresses. ICMPv6 echo is less reliable than ND.

IN case of dual stack <ipv4 and ipv6 togather> nmap can be used to scan
ipv4 addresses in the network, and henceforth use icmpv6 node Info
messages<type 139> to get their respective ipv6 addresses.

The ipv6-node-info script does this. (Actually it gives you IPv4
addresses when you know the IPv4 address; is it possible to go the other
way?)

David Fifield
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