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IPv6 Enabled Services

The following services in Mac OS X Server support IPv6 in addressing:

DNS (BIND)

IP Firewall

Mail (POP/IMAP/SMTP)

SMB

Web (Apache 2)

Additionally, there are a number of command-line tools installed with Mac OS X Server that support IPv6 (for example, ping6, and traceroute6).

IPv6 Addresses in the Server Admin

The services above don’t support IPv6 addresses in the user interface. They can be configured with command-line tools to add IPv6 addresses, but those same addresses will fail if entered into address fields in Server Admin.

IPv6 Addresses

IPv6 addresses are different than IPv4 addresses. In changing addresses, there are changes in address notation, reserved addresses, the address model, and address types.

Notation

While IPv4 addresses are 4 bytes long and expressed in decimals, IPv6 addresses are 16 bytes long and can be expressed a number of ways.

IPv6 addresses are generally written in the following form:

xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx

Pairs of IPv6 bytes are separated by a colon and each byte is represented as a pair of hexadecimal number, as in the following example:

E3C5:0000:0000:0000:0000:4AC8:C0A8:6420

or

E3C5:0:0:0:0:4AC8:C0A8:6420

IPv6 addresses often contain many bytes with a zero value, so a shorthand notation is available. The shorthand notation removes the zero values from the text representation and puts the colons next to each other, as follows:

E3C5::4AC8:C0A8:6420

Chapter 7 IPv6 Support

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Apple 034-2351_Cvr manual IPv6 Enabled Services, IPv6 Addresses in the Server Admin, Notation

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