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. > [EMAIL PROTECTED]:~> host ::ffff:195.135.221.135 > Host > 7.8.d.d.7.8.3.c.f.f.f.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa not > found: 3(NXDOMAIN) > > > See? The host command knows how to read and interpret it, so it is > standard notation. You were right there, but not by trying to reverse resolve it, that's just wrong. Theo -- Theo v. Werkhoven Registered Linux user# 99872 http://counter.li.org ICBM 52 13 26N , 4 29 47E. + ICQ: 277217131 SUSE 10.2 + Jabber: [EMAIL PROTECTED] Kernel 2.6.20 + See headers for PGP/GPG info. Claimer: any email I receive will become my property. Disclaimers do not apply. -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
