-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Sunday 2007-07-15 at 11:52 +0200, Theo v. Werkhoven wrote:
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.
cer@nimrodel:~> 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.
It is an IPv4 address converted to IPv6, so it must be resolvable. In fact, you can see in the header that they resolved it: ] 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; So, if they did, why can't I? That's the question. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFGmgzrtTMYHG2NR9URAn1nAJ4heuLH4eytvz7sdpv8G/XlVRXGVgCfeNt/ blhN8DuV5+/R49AnHpNSH0g= =1EFP -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org