Nmap Development mailing list archives
Re: OS X Lion and IPv6
From: Dario Ciccarone <dciccaro () cisco com>
Date: Sun, 11 Mar 2012 16:30:27 -0400
I noticed that my router (a Apple Time Capsule) is advertising it's link-local address as default gateway. Changing this manually on my OS X host to the global address fixes the problem with scanning global addresses as root. As far as I can tell from a few Google searches it seems as if Apple Airport and Time Capsule advertise their link-local address as the default gateway. To the best of my understanding this should be a valid configuration, as it seems to work for other applications ie. browsing the web etc ...
That's isn't a completely accurate description of how this works :)
From the beginning - RFC-4861, section 4.2 - "Router Advertisement
Message Format", IP Fields - "Source Address: MUST be the link-local address assigned to the interface from which this message is sent. Router Lifetime <snip>A lifetime of 0 indicates that the router is not a default router and SHOULD NOT appear on the default router list</snip> - there is more relevant text. And then on 6.3.4, Processing Received Router Advertisements - <snip>On receipt of a valid RA, a host extracts the source address of the packet and does the following: - If the address is not already present in the host's Default Router List, and the advertisement Router Lifetime is non-zero, . . . .</snip> So your default route(s) should indeed have as a next-hop the link-local address for the router(s) from which you got that information from. That's how it should be done - not that "should be a valid configuration", but that it is THE valid configuration :) _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://seclists.org/nmap-dev/
Current thread:
- OS X Lion and IPv6 Patrik Karlsson (Mar 11)
- Re: OS X Lion and IPv6 Patrik Karlsson (Mar 11)
- Re: OS X Lion and IPv6 Dario Ciccarone (Mar 11)
- Re: OS X Lion and IPv6 Patrik Karlsson (Mar 11)
- Re: OS X Lion and IPv6 Dario Ciccarone (Mar 11)
- Re: OS X Lion and IPv6 Dario Ciccarone (Mar 11)
- Re: OS X Lion and IPv6 Patrik Karlsson (Mar 11)
- Re: OS X Lion and IPv6 Patrik Karlsson (Mar 12)
- Re: OS X Lion and IPv6 David Fifield (Mar 26)
- Re: OS X Lion and IPv6 David Fifield (Mar 26)
- Re: OS X Lion and IPv6 Patrik Karlsson (Mar 26)
- Re: OS X Lion and IPv6 Patrik Karlsson (Mar 11)