Theo v. Werkhoven wrote: > Sun, 15 Jul 2007, by [EMAIL PROTECTED]: > > >> The Sunday 2007-07-15 at 01:24 +0200, Theo v. Werkhoven wrote: >> >> >>>> Received-SPF: none (Address does not pass the Sender Policy Framework) >>>> SPF=HELO; sender=lists4.suse.de; remoteip=::ffff:195.135.221.135; >>>> remotehost=lists4.suse.de; helo=lists4.suse.de; >>>> receiver=exa.billmerriam.com; >>>> >>>> >>>> I noticed the ipv6 address, and I was curious to check who it was: >>>> >>> That is not an IPv6 address. >>> IPv6 addresses are written with hex notation, e.g. >>> 2001:888:10:90f::2 i.e. 8193.2184.16.2319.0.0.0.2 when written in >>> decimal. What the meaning is of the '::ffff:' part I don't know, but >>> it has nothing to do with IPv6 afaik. >>> So your analysis has no meaning. >>> >> Wrong. >> >> Ipv6 addresses can be written in several different formats. The "::ffff" >> part is equivalent to :0:0:0:0:ffff. >> > > Right. But there is no valid (public) address range in IPv6 that starts with > ::ffff , so this address can never be resolved by an Internet DNS. > >
Actually there is, it's called an IPv4 mapped address. >From the IBM TCP/IP Tutorial and Technical Overview redbook" "IPv4-mapped address (::FFFF:<IPv4_address>): Addresses of this kind are used when an IPv6 host needs to communicate with an IPv4 host." -- Use OpenOffice.org <http://www.openoffice.org> -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
